Academic literature on the topic 'Herbicide strategies'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Herbicide strategies.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Herbicide strategies"
1
Swanson, Bert T., and James B. Calkins. "Weed Control Strategies for Field- and Container-grown Herbaceous Perennials." HortScience 30, no. 4 (July 1995): 894E—894. http://dx.doi.org/10.21273/hortsci.30.4.894e.
Full textAbstract:
Fourteen herbicides or herbicide combinations, a wood chip mulch, a chipped rubber tire mulch, and a newspaper mulch were evaluated for weed control efficacy and potential phytotoxicity using 12 species of herbaceous perennials under field-growing conditions. Nineteen herbicides or herbicide combinations were similarly evaluated under container-growing conditions using 11 species of herbaceous perennials. The effect of herbicide application time also was monitored through application of herbicides to dormant and actively growing plants. Herbicides and mulch treatments were compared to weeded and nonweeded controls. Herbicide phytotoxicity effects were dependent on the age and species of the herbaceous perennial and herbicide application timing. Herbicide injury was generally greater for newly established plants compared to established plants. Although injury was usually reduced when herbicides were applied to dormant plants, injury was sometimes greater when herbicides were applied in early spring compared to applications made in late spring after complete herbaceous perennial emergence. This effect resulted in injury to young shoots that had emerged before the earliest possible time that herbicides could be applied in early spring. A wood chip mulch provided the most effective weed control and highest quality plants under field growing conditions. Several of the herbicides evaluated demonstrated potential for weed control in both field and container herbaceous perennial production systems and landscape plantings.
2
Kao-Kniffin, Jenny, Sarah M. Carver, and Antonio DiTommaso. "Advancing Weed Management Strategies Using Metagenomic Techniques." Weed Science 61, no. 2 (June 2013): 171–84. http://dx.doi.org/10.1614/ws-d-12-00114.1.
Full textAbstract:
Global occurrences of herbicide resistant weed populations have increased the demand for development of new herbicides targeting novel mechanisms of action. Metagenomic approaches to natural drug discovery offer potential for isolating weed suppressive compounds from microorganisms. In past research, traditional techniques entailed isolating compounds from living organisms, whereas metagenomic approaches involve extracting fragments of DNA from soil and exploring for compounds of interest produced by the transformed hosts. Several herbicidal compounds have been isolated from soil bacteria through culturing methods and have led to the development of popular herbicides, such as glufosinate. In this review, we discuss the emergence of metagenomic approaches for weed management in the context of natural product discovery using traditional culture-dependent isolation and the more recent culture-independent methods. The same techniques can be used to isolate herbicide resistance genes. Adoption of metagenomic approaches in pest management research can lead to novel control strategies in cropping and landscape systems.
3
Calkins, James B., Bert T. Swanson, and Debra L. Newman. "Weed Control Strategies for Field Grown Herbaceous Perennials." Journal of Environmental Horticulture 14, no. 4 (December 1, 1996): 221–27. http://dx.doi.org/10.24266/0738-2898-14.4.221.
Full textAbstract:
Abstract Fourteen herbicides or herbicide combinations, wood chip mulch, chipped rubber tire mulch, and newspaper mulch were evaluated for weed control efficacy and phytotoxicity using 12 species of herbaceous perennials under field growing conditions. The effect of herbicide application time was monitored by applying herbicides to dormant and actively growing plants. Herbicide and mulch treatments were compared to weeded and non-weeded controls. Herbicide phytotoxicity was dependent on age and species of herbaceous perennial and time of herbicide application. Herbicide injury was generally greater for young plants compared to established plants and phytotoxicity was usually reduced when herbicides were applied to dormant rather than actively growing plants. Injury was sometimes greater when herbicides were applied in early spring compared to applications made after complete herbaceous perennial emergence. Injury to young shoots that had emerged prior to the earliest possible time that herbicides could be applied in the spring was probably involved. Applying herbicides in the fall may avoid such injury. Mulching field grown perennials with wood chips provided the most effective weed control and often the best quality plants. With the exceptions of Hemerocallis ‘After Dark’ and Phlox maculata ‘Omega’, the herbaceous perennials evaluated were tolerant of most of the herbicides applied. Several herbicides, including Balan 2.5G at 3.36 kg ai/ha (3.0 lb ai/A), Snapshot 80DF at 4.48 kg ai/ha (4.0 lb ai/A), and Stomp 60WDG at 4.48 kg ai/ha (4.0 lb ai/A), demonstrated potential for weed control in herbaceous perennial production systems and landscape plantings. Goal 1.6EC at 1.68 kg ai/ha (1.5 lb ai/A) and Ronstar 50WP at 3.92 kg ai/ha (3.5 lb ai/A) were often phytotoxic when applied to herbaceous perennials.
4
Kahn, Brian A., Raymond Joe Schatzer, and Wendy A. Nelson. "COMPARISON OF CHEMICAL AND MECHANICAL WEED CONTROL STRATEGIES FOR COWPEA." HortScience 25, no. 9 (September 1990): 1097f—1097. http://dx.doi.org/10.21273/hortsci.25.9.1097f.
Full textAbstract:
The herbicides trifluralin, metolachlor, and paraquat were compared for efficacy of weed control in cowpea with and without cultivation as a supplemental strategy for two years. Herbicides also were compared against a no-herbicide control (with and without cultivation). Cultivation had no significant effect on seed yield, biological yield, or harvest index of cowpea. Paraquat, used in a “stale seedbed” system, was ineffective for weed control and did not change cowpea yield from that of the no-herbicide control. Trifluralin and metolachlor more then tripled cowpea seed yield compared to that of the no-herbicide control in 1988, when potential weed pressure was 886 g m-2 (dry wt.). Trifluralin and metolachlor did not significantly increase cowpea seed yield compared to that of the no-herbicide control in 1989, when potential weed pressure was 319 g m-2 (dry wt.). However, in 1989, these two herbicides each still increased net farm income by $206 per hectare compared to the income obtained without an herbicide.
5
Deng, Xile. "Current Advances in the Action Mechanisms of Safeners." Agronomy 12, no. 11 (November 11, 2022): 2824. http://dx.doi.org/10.3390/agronomy12112824.
Full textAbstract:
Herbicide safeners are a series of agrochemicals that can selectively protect crop plants from herbicide injury without affecting herbicidal efficacy. Understanding mechanisms by which safeners act is significant for discovery of novel types. Safeners primarily alleviate herbicide phytotoxicity to crop plants via several actions: (i) enhancing metabolism of herbicides in crops; (ii) affecting absorption and transportation of herbicides in crops; (iii) competitively binding to herbicide target sites; and (iv) affecting activity of target enzymes. This review describes recent advances in the action mechanisms of safeners, analyzes existing problems, anticipates the future direction of studies of modes of action of safeners, and prospects potential strategies to design safeners related to their reported mechanisms. The aim of this paper is to provide insight into mechanisms of safeners and give tips for development of new safeners.
6
Wang, Pei, Hui Li, Weidong Jia, Yin Chen, and Roland Gerhards. "A Fluorescence Sensor Capable of Real-Time Herbicide Effect Monitoring in Greenhouses and the Field." Sensors 18, no. 11 (November 5, 2018): 3771. http://dx.doi.org/10.3390/s18113771.
Full textAbstract:
Herbicide resistant weeds need to be identified early so that yield loss can be avoided by applying proper field management strategies. A novel chlorophyll-fluorescence-imaging sensor has been developed to conduct real-time herbicide effect evaluation. In this research, greenhouse and field experiments were conducted to calibrate the capability of the sensor in monitoring herbicide effects on different biotypes of two grass weeds (Alopecurus myosuroides, Apera spica-venti) in southwestern Germany. Herbicides with different modes of action were applied for the effect monitoring. Chlorophyll fluorescence yield of the plants was measured 3–15 days after treatment (DAT) using the new fluorescence sensor. Visual assessment of the weeds was carried out on 21 DAT. The results showed that the maximal PS II quantum yield (Fv/Fm) of herbicide sensitive weeds was significantly lower than the values of resistant populations in 5 DAT. The new technology was capable of quickly identifying the herbicide’s effect on plants. It can be used to optimize management strategies to control herbicide resistant weeds.
7
Basu, Sayantani, and Y. Vasudeva Rao. "Environmental Effects and Management Strategies of the Herbicides." International Journal of Bio-resource and Stress Management 11, no. 6 (December 31, 2020): 518–35. http://dx.doi.org/10.23910/1.2020.2069d.
Full textAbstract:
India has wide range of agro-climates and soil types and highly diverse agriculture farming systems with different types of weed problems. So, herbicides are the integrated part of the general cropping systems. In general, herbicides are formulated in such a way that they degrade from the environment after completion of their intended work, but a few of them persist in the environment and cause a serious hazard to the succeeding crop and also to the surrounding environments. Hence, a proper knowledge of herbicides is important to understand the management procedure, organization and hierarchy of the herbicides. It also provides an imminent idea to herbicide resistance, which continues to be a problem in sustainable agricultural management. In this review, the herbicides used in India, negative impact of herbicides on the environment, persistency of herbicides, their dissipation methods and different management practices to avoid/minimize herbicide carry-over effects were discussed. The combine effects of bioaugmentation and biostimulation along with organic matter addition might be a promising technology to accelerate the biodegradation. Apart from these, extensive field evaluation studies with other tools like crop rotation and increment of the organic matter content is definitely a promising technique for managing the herbicide persistence. Bioherbicides, a biological control agent for weeds, and transgenic approaches can be a good alternative for chemical herbicides in future. They provide high degree of specificity of target weed and have no effect on non-target, beneficial plants or man and do not form any residues in the environment.
8
Retzinger, E. James, and Carol Mallory-Smith. "Classification of Herbicides by Site of Action for Weed Resistance Management Strategies." Weed Technology 11, no. 2 (June 1997): 384–93. http://dx.doi.org/10.1017/s0890037x00043116.
Full textAbstract:
A classification of herbicides according to their sites of action was developed to help maintain the usefulness of herbicides as a tool in crop production to delay the selection of herbicide-resistant weeds. The classification includes a numbering system for the site of action, the chemical family, and the common name of the herbicide. The United States of America trade name and package mixes also are included.
9
Lybecker, Donald W., Edward E. Schweizer, and Robert P. King. "Weed Management Decisions in Corn Based on Bioeconomic Modeling." Weed Science 39, no. 1 (March 1991): 124–29. http://dx.doi.org/10.1017/s0043174500057982.
Full textAbstract:
A fixed (conventional) weed management strategy in corn was compared to three other strategies (two mixed and one flexible) in terms of weed control, grain yield, gross margin (gross income minus herbicide treatment costs), and herbicide use under furrow irrigation for four consecutive years. The fixed strategy prespecified preplanting, preemergence, postemergence, and layby herbicides. The flexible strategy herbicide treatments were specified by a computer bioeconomic model. Model decisions were based on weed seed in soil before planting, weed densities after corn emergence, herbicide costs, expected corn grain yield and selling price, and other parameters. The two mixed strategies were a combination of fixed and flexible strategies and designated either specified soil-applied herbicides (mixed/soil), or no soil-applied herbicide (mixed/no soil); postemergence treatments were determined by the model. Average corn grain yield was 10 280 kg ha–1and gross income was 920 $ ha–1and neither differed among strategies. Total weed density and gross margin were significantly higher for the mixed/no soil and flexible strategies compared to the mixed/soil and fixed strategies. Total weed density averaged 28 720, 28 100, 10 910, and 680 plants ha–1for the mixed/no soil, flexible, mixed/soil, and fixed strategies, respectively. Annual gross margins for the four strategies averaged 885, 875, 845, and 810 $ ha–1, respectively. Herbicide use over the 4-yr period for these four strategies averaged 3.8, 5.3, 20.5, and 26.9 kg ha–1, respectively, and each value differed from the other. Thus, weeds can be managed in corn, gross margins increased, and herbicide use decreased by employing a bioeconomic weed-corn model to make weed management decisions.
10
Thill, D. C., J. T. O’Donovan, and C. A. Mallory-Smith. "Integrated weed management strategies for delaying herbicide resistance in wild oats." Comptes rendus 75, no. 4 (April 12, 2005): 61–70. http://dx.doi.org/10.7202/706072ar.
Full textAbstract:
Herbicide-resistant biotypes of wild oats (Avena fatua) infest most major cereal producing regions in the western United States and Canada. This paper reviews potential integrated weed management strategies that can be used to prevent or delay selection of herbicide-resistant wild oats plants. An integrated wild oats management strategy to delay or prevent the development of herbicide resistance should be based on preventing the movement of wild oats seed into the soil. Two ways to achieve this are by preventing the immigration of seed into the field from external sources, and by reducing or eliminating seed production by wild oats already in the field. It is becoming increasingly clear that reliance on continuous herbicide useas the sole means of weed control will fail to eliminate wild oats and other weed seed from the soil seedbank. On the contrary, evidence is mounting that this practice will select for biotypes that are resistant to the herbicides used, especially where herbicides of the same mode of action are used continuously. It is essential, therefore, that herbicides be considered as just one component of an overall integrated System together with cultural control and other management strategies, and that agronomic principles be considered when developing this System.
Dissertations / Theses on the topic "Herbicide strategies"
1
Welgama, Amali. "Herbicide application strategies for wild radish management in Imidazolinone tolerant faba bean." Thesis, Federation University Australia, 2020. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/176148.
Full textAbstract:
The extensive and continual use of herbicides in cropping situations has inevitably led to the phenomenon of "herbicide-resistance" in weeds and this has become one of the most challenging issues in modern agriculture. Herbicide-tolerant crops (HTC) were introduced to diversify weed management practices, but the lack of integrated weed management strategies, along with the continuous use of the same herbicide mode of action (MOA) demanded by the HTC has continued to impose selection pressure on weeds to evolve with herbicide resistance. Consequently, this thesis has been focused on the introduction of herbicide MOA combinations into HTC systems in an attempt to reduce the rate of herbicide resistance evolution in weeds. Raphanus raphanistrum is the number one broadleaf weed in Australia, and for this case study, the newly released ALS-inhibiting imidazolinone tolerant faba bean cultivar PBA Bendoc with its conventional cultivar, PBA Samira, were selected as the study species. ALS-inhibiting (imazamox + imazapyr and imazethapyr) and PSII-inhibiting (metribuzin) herbicides were used as the two herbicide MOAs. The herbicide sensitivity of R. raphanistrum was initially evaluated at different growth stages, in glasshouse studies using herbicide-resistant and susceptible biotypes to ALS-inhibiting herbicides. The highest susceptibility was observed at the earliest growth stage regardless of the biotype and Imazamox + imazapyr proved to be more effective in controlling both biotypes compared to imazethapyr. The same two herbicides were tested on faba bean cultivars at different growth stages to assess crop tolerance and identify the herbicide application window. The field trials conducted in 2018 and 2019 showed increased ALS-inhibiting herbicide tolerance in PBA Bendoc compared to PBA Samira even at the most advanced growth stage. Both faba bean cultivars were then evaluated for their tolerance to metribuzin in-crop application at different herbicide rates. Both cultivars responded similarly, showing progressive herbicide damage with increasing application rates. However, the reduced pod number, even at the lowest rate used, flagged the possible yield penalties that may result in using in-crop metribuzin applications. It is thus suggested that metribuzin must be used post sowing pre-emergent (PSPE) respecting the label recommendations. The potential herbicide combinations were then tested on herbicide-resistant R. raphanistrum and PBA Bendoc to evaluate their efficacies. Metribuzin was initially used as PSPE in all combinations, and was to be followed by imazamox + imazapyr applications at the same growth stages of the weed and the crop as in previous experiments. However, 100% control of R. raphanistrum was achieved using metribuzin alone, and thus no second herbicide was required. All the assessed herbicide combinations were tolerated by PBA Bendoc, proving the suitability of these herbicide combinations for incorporation into the PBA Bendoc cropping system. These results led to two potential herbicide combination strategies: (i) herbicide rotations, with metribuzin as PSPE in one year along with another potential herbicide MOA in the following year, (ii) herbicide sequential application, with metribuzin applied at PSPE and imazamox + imazapyr applied at the 2-4 leaf stage if R. raphanistrum plants survived the metribuzin treatment. A seed germination study was conducted under different temperature/photoperiods, pH levels, osmotic potentials, salinity and burial depths to identify the optimal germination conditions for R. raphanistrum. The optimum germination conditions for both herbicide-resistant and susceptible biotypes of R. raphanistrum were found to be 25ºC/15ºC temperature range under 24 hours complete dark. However, the significant interaction between photoperiod and temperature indicated that the seed germination under higher temperatures is less favoured by 24 hours dark conditions regardless of the biotype. An increased moisture stress tolerance in herbicide-resistant seeds was observed, whilst both biotypes reacted similarly to different pH levels and burial depths. In summary, this thesis has elucidated the effectiveness of two herbicide MOAs in controlling R. raphanistrum while addressing the crop tolerance to these herbicide MOA combinations. These findings will help in setting up stewardship guidelines to be used with the PBA Bendoc faba bean cultivar to mitigate the misuse of herbicides, thus ensuring their sustainable application. In addition, the demonstration of differential seed germination requirements of resistant and susceptible R. raphanistrum seeds has provided further information to help with its systematic management. Overall, this study can be used as a case study to investigate herbicide options that can be used in different HT crop cultivars to control a range of weed species.Doctor of Philosophy
2
Nietschke, Brett Steven. "Integrated strategies for wild oat (Avena spp.) management in southern Australian farming systems." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phn677.pdf.
Full textAbstract:
Bibliography: leaves 128-146. Study was undertaken to determine the occurence and species incidence of wild oats in a major cropping region of southern Australia. Population dynamic studies were undertaken at two sites to define the seed bank decline and emergence pattern of several wild oat populations over a three year period. Management studies were conducted to determine appropriate strategies for the control of wild oats in southern Australian farming systems.
3
Rey, Caballero Jordi. "Unravelling herbicide resistance in corn poppy (Papaver rhoeas L.) to improve integrated weed management strategies." Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/382633.
Full textAbstract:
La presencia de biotipos de amapola (Papaver rhoeas L.) resistentes a herbicidas constituye uno de los principales problemas de muchas áreas cerealistas de secano. La solución del mismo pasa por una correcta caracterización de la resistencia y por el establecimiento de una adecuada estrategia de manejo integrado. El presente trabajo se ha planteado precisamente con este fin. Para ello a) se han seleccionado biotipos con resistencia múltiple (a inhibidores de la acetolactato sintasa -ALS- y a herbicidas auxínicos) y biotipos únicamente resistentes a 2,4-D originarios de las zonas cerealistas del noreste peninsular de los que se han estudiado las bases moleculares y fisiológicas de estas resistencias; b) se ha querido discernir bajo condiciones controladas (invernadero), si los fallos de control observados en campo, mediante herbicidas inhibidores del fotosistema II (bromoxinil), son debidos al estadio fenológico de la mala hierba en el momento de aplicación o a la presencia de una posible resistencia incipiente y c) se han establecido diferentes estrategias de manejo integrado de amapola en campos comerciales de cereales de secano del noreste peninsular.La presència de biotips de rosella (Papaver rhoeas L.) resistents a herbicides constitueix un dels principals problemes de moltes àrees cerealistes de secà. La solució del mateix passa per una correcta caracterització de la resistència així com en l'establiment d'una adequada estratègia de maneig integrat. El present treball s'ha plantejat precisament amb aquesta finalitat. Per això a) s'han seleccionat biotips amb resistència múltiple (a inhibidors de la acetolactato sintasa -ALS- i a herbicides auxínics) i biotips únicament resistents a 2,4-D originaris de les zones cerealistes del nord-est peninsular i s’han estudiat les bases moleculars i fisiològiques d'aquestes resistències; b) s'ha volgut discernir sota condicions controlades (hivernacle), si la manca de control observada en camp, mitjançant herbicides inhibidors del fotosistema II (bromoxinil), és deguda a l'estadi fenològic de la mala herba en el moment de l’aplicació o a la presència d' una possible resistència incipient i c) s'han establert diferents estratègies de maneig integrat de rosella en camps comercials de cereals de secà del nord-est peninsular.
The persistence of resistant corn poppy (Papaver rhoeas L.) biotypes is one of the most pressing problems in rainfed Spanish cereal crops. Resolution to this problem begins with the proper characterization of the resistant profile, followed by the establishment of an appropriate integrated management system. The study herein has been conducted precisely towards this end, while maintaining the following bases as a general framework: a) corn poppy biotypes with multiple resistance (acetolactate synthase -ALS- inhibiting herbicides and auxinic herbicides) and only 2,4-D resistance from north-eastern Spain were selected for analysis of molecular and physiological resistance matrices; b) we have tried to investigate under controlled conditions, if failures observed in the field, by photosystem II inhibiting herbicides (bromoxynil), could be directly attributed to the phenological stage of the weed at application time or inherent resistance and c) the creation of integrated management strategies for corn poppy and rainfed cereal fields in North-Eastern Spain.
4
Ferebee, James Harrison IV. "New Herbicide Strategies for Weed Management in Pumpkin and Soybean and Potato Vine Desiccation." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/86611.
Full textAbstract:
Weed control and desiccation are routinely executed with herbicides. Potato vine desiccation facilitates harvest, improves skin set, and regulates tuber size. Saflufenacil, glufosinate, saflufenacil plus glufosinate, and carfentrazone plus glufosinate were compared to diquat applied at 43, 31, and 17% B potatoes; similar vine desiccation (14 days after treatment), skin set, and yield were noted amongst treatments. Residual herbicides are routinely used for weed control in pumpkin. Fluridone and acetochlor formulations applied preemergence were evaluated in direct-seeded pumpkin compared to other labeled herbicides. Fluridone resulted in total crop loss following heavy rainfall immediately after planting; less rainfall resulted in transient injury. Acetochlor formulations resulted in significant pumpkin injury (34 to 39%) 14 days after planting. S-metolachlor controlled weeds similar to acetochlor without significant injury. Palmer amaranth has developed resistance to six different herbicide modes of action. The weed grows rapidly and is best controlled <10 cm in height. To control glyphosate and ALS- resistant biotypes, fomesafen plus dicamba were applied at first postemergence (POST) to small Palmer amaranth (<5 cm, 0 d) and at simulated delays of 7, 14, 21, and 28 d. All plots received lactofen plus dicamba 14 days after first POST. Palmer amaranth control 14 days after first POST was 100% when delayed 0 or 7 d and 62% at the 28 day delay; control increased to 88% following lactofen plus dicamba applied second POST. Yield was significantly reduced when first POST was delayed 28 days at one location.Master of Science in Life Sciences
Herbicides effectively control weeds by either applying them to the soil prior to emergence or applying them to foliage. Herbicides are used for desiccation of potato vines to facilitate harvest, improve skin set, and regulate tuber size. Potatoes with tougher skin have a longer shelf life and are more resistant to disease. Potato grade classifications include size chef, A, and B potatoes. Size B potatoes hold the greatest value for redskinned potatoes. Experiments were conducted in Virginia to evaluate saflufenacil, glufosinate, saflufenacil plus glufosinate, and carfentrazone plus glufosinate as desiccants compared to diquat applied at 43, 31, and 17% B potatoes. All desiccants resulted in similar vine desiccation 14 days after treatment, skin set, and yield. This research demonstrates that glufosinate and saflufenacil are effective alternatives to diquat for potato vine desiccation; however, further research is needed to evaluate the safety of saflufenacil applied to potatoes prior to harvest. Soil applied herbicides are commonly used in pumpkin production. Fluridone and two acetochlor formulations, herbicides that effectively control troublesome weeds in other crops, were evaluated for pumpkin production in addition to fomesafen, ethalfluralin, clomazone, halosulfuron, and S-metolachlor. Fluridone and acetochlor formulations resulted in significant pumpkin injury early in the growing season and total crop loss was observed by fluridone in 2018. Fomesafen significantly reduced pumpkin iv stand and yield. S-metolachlor, a member of the same chemical family as acetochlor, provided similar weed control without significant pumpkin injury. This research demonstrates that fluridone and acetochlor formulations are poor candidates for pumpkin production. Palmer amaranth is a troublesome weed in soybean that grows rapidly and is resistant to many herbicides. Palmer amaranth is best controlled at a height of 10 cm or less, but timely applications are not always feasible. Fomesafen plus dicamba were applied to small Palmer amaranth (<5 cm, 0 day) and at simulated delays of 7, 14, 21, and 28 days. All treatments received lactofen plus dicamba 14 days after the initial postemergence. Palmer amaranth control 14 days after first postemergence was 100% when application was delayed 0 or 7 day whereas Palmer amaranth control was 62% when first postemergence was delayed 28 days. Lactofen plus dicamba applied second postemergence increased control to 88% when the first postemergence was delayed 28 days. Compared to nontreated plots, Palmer amaranth biomass was reduced 99% by all treatments. This research demonstrates that fomesafen plus dicamba followed by lacofen plus dicamba can be effective for rescue control of Palmer amaranth.
5
McCloskey, William B. "Preliminary Study of Cotton Weed Control Strategies Using Over-The-Top Herbicides." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/210357.
Full textAbstract:
A study was conducted at the Maricopa Agricultural Center to compare various cotton weed control programs that combined the use of the over-the-top herbicides Buctril, Roundup Ultra and Staple with reduced or eliminated preemergence herbicide applications in dry planted cotton. Roundup Utra provide superior large seedling Palmer amaranth control compared to Buctril or Staple. The yield and end of the season weed control data showed that BXNBuctril and Staple weed control strategies require the application of a dinitroaniline herbicide prior to planting. The data also suggest that a band application of Prowl in combination with timely postemergence Buctril or Staple applications would be just as effective as preplant incorporated application of Prowl. In contrast to the Buctril and Staple herbicide treatments, the end of the season weed control ratings and seed cotton yield were the same for all of the Roundup Ready cotton treatments suggesting that Roundup Ready cotton weed control strategies do not necessarily require a dinitroaniline herbicide (Prowl or Trejlan) application prior to planting.
6
Bradley, Kevin Wayne. "Characterization of the Mechanism of Resistance of a Johnsongrass (Sorghum halepense) Biotype to Selected Graminicides in Virginia and Response of Mugwort (Artemisia vulgaris) to Specific Herbicidal and Cultural Control Strategies." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/27343.
Full textAbstract:
Johnsongrass [Sorghum halepense (L.) Pers.] and mugwort (Artemisia vulgaris L.) are both rhizomatous perennial weeds that are capable of rapidly colonizing a variety of different environments. Separate experiments were conducted throughout Virginia from 1996 to 1999 to determine more effective methods for reducing infestations of these perennial weeds in the future. Field and greenhouse experiments conducted on a resistant johnsongrass population discovered in New Kent County, Virginia revealed that this biotype exhibits low levels of resistance to the aryloxyphenoxypropionate (APP) herbicides quizalofop-P and fluazifop-P and the cyclohexanedione (CHD) herbicide sethoxydim. Additional laboratory experiments revealed that resistance is not due to differential absorption, translocation, or metabolism of the APP and CHD herbicides in the resistant vs. the susceptible biotype. However, acetyl-coenzyme A carboxylase (ACCase) assays revealed that resistance to the APP and CHD herbicides is conferred by an overproduction of the ACCase enzyme in the resistant compared to the susceptible johnsongrass biotype. In field experiments conducted on mugwort infestations discovered in several counties throughout Virginia, 100% mugwort control was achieved with standard application rates of picloram at 4 months after treatment (MAT), and also greater than 70% mugwort control was achieved with the higher application rates of clopyralid, glyphosate, and dicamba at 4 MAT. However, all other herbicides evaluated in these experiments provided less than 65% mugwort control at 4 MAT, even at exceptionally high use rates. Additionally, the results from these trials revealed that sequential herbicide applications and sequential mowings prior to herbicide application are both effective mugwort control strategies.Ph. D.
7
Ulber, Lena. "Weed species diversity in cropping systems: Management and conservation strategies." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-B052-0.
Full textBooks on the topic "Herbicide strategies"
1
Maxwell, Darrell C. Strategies with herbicides in summer fallow. [Corvallis, Or.]: Oregon State University Extension Service, 1985.
Find full text
2
National Summit on Strategies to Manage Herbicide-Resistant Weeds. Washington, D.C.: National Academies Press, 2012. http://dx.doi.org/10.17226/13518.
Full text
3
National Summit on Strategies to Manage Herbicide-Resistant Weeds: Proceedings of a Symposium. National Academies Press, 2012.
Find full text
4
R, Rainbolt Curtis, and University of Idaho. Cooperative Extension System., eds. Management strategies for preventing herbicide-resistant grass weeds in clearfield wheat systems. [Moscow, Idaho]: University of Idaho Cooperative Extension System, 2004.
Find full text
5
Planning Committee for a National Summit on Strategies to Manage Herbicide-Resistant Weeds, Board on Agriculture and Natural Resources, Division on Earth and Life Studies, and National Research Council. National Summit on Strategies to Manage Herbicide-Resistant Weeds: Proceedings of a Workshop. National Academies Press, 2012.
Find full text
6
Planning Committee for a National Summit on Strategies to Manage Herbicide-Resistant Weeds, Board on Agriculture and Natural Resources, Division on Earth and Life Studies, and National Research Council. National Summit on Strategies to Manage Herbicide-Resistant Weeds: Proceedings of a Symposium. National Academies Press, 2012.
Find full text
7
Planning Committee for a National Summit on Strategies to Manage Herbicide-Resistant Weeds, Board on Agriculture and Natural Resources, Division on Earth and Life Studies, and National Research Council. National Summit on Strategies to Manage Herbicide-Resistant Weeds: Proceedings of a Workshop. National Academies Press, 2012.
Find full text
8
Moritz Jasper Wendt, Christine Kenter, Martin Wegener, and Bernward Märländer. Efficacy of different strategies using an ALS-inhibitor herbicide for weed control in sugar beet (Beta vulgaris L.). Verlag Eugen Ulmer, 2016. http://dx.doi.org/10.1399/jfk.2016.11.03.
Full textBook chapters on the topic "Herbicide strategies"
1
Chandran, Rakesh S. "Strategies for Reduced Herbicide Use in Integrated Pest Management." In Integrated Pest Management, 303–29. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7796-5_13.
Full text
2
Altman, Jack, Stephen Neate, and Albert D. Rovira. "Herbicide—Pathogen Interactions and Mycoherbicides as Alternative Strategies for Weed Control." In ACS Symposium Series, 240–59. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0439.ch013.
Full text
3
Moss, S. "Strategies for the Prevention and Control of Herbicide Resistance in Annual Grass Weeds." In Weed and Crop Resistance to Herbicides, 283–90. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5538-0_31.
Full text
4
Kaur, Simerjeet, Khawar Jabran, Singarayer Florentine, and Bhagirath S. Chauhan. "Assuring Crop Protection in the Face of Climate Change Through an Understanding of Herbicide Metabolisms and Enhanced Weed Control Strategies." In Crop Protection Under Changing Climate, 17–56. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46111-9_2.
Full text
5
Gressel, J. "Burgeoning Resistance Requires New Strategies." In Weed and Crop Resistance to Herbicides, 3–14. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5538-0_1.
Full text
6
Palanivel, Hemalatha, Gebiyaw Tilaye, Sathish Kumar Belliathan, Solomon Benor, Solomon Abera, and M. Kamaraj. "Allelochemicals as Natural Herbicides for Sustainable Agriculture to Promote a Cleaner Environment." In Strategies and Tools for Pollutant Mitigation, 93–116. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63575-6_5.
Full text
7
Feng, Paul C. C., and Thomas G. Ruff. "A Review of Strategies to Engineer Plant Tolerance to the Pyridine Herbicides." In ACS Symposium Series, 129–44. Washington, DC: American Chemical Society, 2000. http://dx.doi.org/10.1021/bk-2001-0777.ch007.
Full text
8
Banerjee, Samrat, Mehali Mitra, Pinaki Roy, Sreyashi Nandi, and Sujit Roy. "Multiple Adaptation Strategies of Plants to Mitigate the Phytotoxic Effects of Diverse Pesticides and Herbicides." In Emerging Contaminants and Associated Treatment Technologies, 309–31. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-22269-6_12.
Full text
9
Kruger, Erna, Hendrik Smith, Phumzile Ngcobo, Mazwi Dlamini, and Temakholo Mathebula. "Conservation agriculture innovation systems build climate resilience for smallholder farmers in South Africa." In Conservation agriculture in Africa: climate smart agricultural development, 345–60. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781789245745.0021.
Full textAbstract:
Abstract Introduction of Conservation Agriculture (CA) and associated climate-resilient agriculture practices within an innovation system approach, and using farmer-level experimentation and learning groups as the primary learning and social empowerment processes, has created a sustainable and expanding farming alternative for smallholders that is improving their resilience to climate change substantially. Through a knowledge co-creation process, smallholder farmers in the programme have adapted and incorporated a wide range of practices into their farming system, including minimum soil disturbance, close spacing, improved varieties, judicious use of fertilizer, pesticides and herbicides, crop diversification, intercropping and crop rotation as well as fodder production and livestock integration. They have organized themselves into learning groups, local savings and loan associations, water committees, farmer centres and cooperatives and in so doing have created innovation platforms for local value chain development. They have built ongoing relationships with other smallholders, NGOs, academic institutions, government extension services and agribusiness suppliers, and have promoted CA tirelessly within their local communities and social networks. To date, this is the most successful model for implementation of CA in smallholder farming in South Africa and, through networking and upscaling activities, is being promoted nationally as a strategic approach to smallholder adaptation and mitigation programming, in line with the Africa climate smart agriculture (CSA) Vision 25×25 (NEPAD, Malabo, June 2014).
10
Elmore, Matthew T., Aaron J. Patton, Travis W. Gannon, and James T. Brosnan. "Advances in turfgrass weed management." In Achieving sustainable turfgrass management, 339–88. Burleigh Dodds Science Publishing, 2023. http://dx.doi.org/10.19103/as.2022.0110.11.
Full textAbstract:
Weeds are a major pest that reduce aesthetics and functionality of turfgrass systems. Knowledge required for effective weed management has evolved in recent years as weeds develop resistance to herbicides, government restriction of broad-spectrum herbicides has increased, and registration of new herbicide active ingredients has slowed. This chapter discusses relevant and recent developments in synthetic herbicides, alternatives to synthetic herbicides, and non-chemical strategies for weed management including cultural, physical, and genetic approaches. Advances in integrated weed management strategies and barriers preventing adoption of integrated weed management strategies are also discussed. Opportunities for research and development to improve integrated weed management are presented throughout.
Reports on the topic "Herbicide strategies"
1
Pokrzywinski, Kaytee, West Bishop, Christopher Grasso, Kaitlin Volk, and Kurt Getsinger. Chemical management strategies for starry stonewort : a mesocosm study. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42040.
Full textAbstract:
US Environmental Protection Agency (USEPA) approved algaecides and herbicides are frequently utilized to manage nuisance algae and aquatic macrophytes. However, there is limited information available on the effectiveness of these products for the management of starry stonewort. Thus, the goal of this research was to discern effective chemical control products for later growth stages of starry stonewort using mesocosm studies. Eleven treatments were evaluated using various combinations of four copper-based products, endothall, diquat, and carfentrazone – all with USEPA registrations for use in aquatic sites. To assess treatment efficacy, water quality, photophysiology, biomass changes, and bulbil viability were evaluated. Nine of the eleven treatments yielded lower dissolved oxygen concentrations and higher specific conductance when compared to the control. Photophysiological response varied by condition, but seven of eleven treatments resulted in significantly lower fluorescent and maximum fluorescent yield. Five of these also exhibited significantly lower average photosynthetic yields, with combination treatments resulting in more drastic decreases. Ten of the eleven treatments had significantly less biomass compared to the control when measured via wet weight; however, only four treatments were significant when measured via dry weight. Lastly, all conditions utilizing copper-based products significantly reduced bulbil viability while non-copper products had no impact.
2
Wright, Kirsten. Collecting Plant Phenology Data In Imperiled Oregon White Oak Ecosystems: Analysis and Recommendations for Metro. Portland State University, March 2020. http://dx.doi.org/10.15760/mem.64.
Full textAbstract:
Highly imperiled Oregon white oak ecosystems are a regional conservation priority of numerous organizations, including Oregon Metro, a regional government serving over one million people in the Portland area. Previously dominant systems in the Pacific Northwest, upland prairie and oak woodlands are now experiencing significant threat, with only 2% remaining in the Willamette Valley in small fragments (Hulse et al. 2002). These fragments are of high conservation value because of the rich biodiversity they support, including rare and endemic species, such as Delphinium leucophaeum (Oregon Department of Agriculture, 2020). Since 2010, Metro scientists and volunteers have collected phenology data on approximately 140 species of forbs and graminoids in regional oak prairie and woodlands. Phenology is the study of life-stage events in plants and animals, such as budbreak and senescence in flowering plants, and widely acknowledged as a sensitive indicator of environmental change (Parmesan 2007). Indeed, shifts in plant phenology have been observed over the last few decades as a result of climate change (Parmesan 2006). In oak systems, these changes have profound implications for plant community composition and diversity, as well as trophic interactions and general ecosystem function (Willis 2008). While the original intent of Metro’s phenology data-collection was to track long-term phenology trends, limitations in data collection methods have made such analysis difficult. Rather, these data are currently used to inform seasonal management decisions on Metro properties, such as when to collect seed for propagation and when to spray herbicide to control invasive species. Metro is now interested in fine-tuning their data-collection methods to better capture long-term phenology trends to guide future conservation strategies. Addressing the regional and global conservation issues of our time will require unprecedented collaboration. Phenology data collected on Metro properties is not only an important asset for Metro’s conservation plan, but holds potential to support broader research on a larger scale. As a leader in urban conservation, Metro is poised to make a meaningful scientific contribution by sharing phenology data with regional and national organizations. Data-sharing will benefit the common goal of conservation and create avenues for collaboration with other scientists and conservation practitioners (Rosemartin 2013). In order to support Metro’s ongoing conservation efforts in Oregon white oak systems, I have implemented a three-part master’s project. Part one of the project examines Metro’s previously collected phenology data, providing descriptive statistics and assessing the strengths and weaknesses of the methods by which the data were collected. Part two makes recommendations for improving future phenology data-collection methods, and includes recommendations for datasharing with regional and national organizations. Part three is a collection of scientific vouchers documenting key plant species in varying phases of phenology for Metro’s teaching herbarium. The purpose of these vouchers is to provide a visual tool for Metro staff and volunteers who rely on plant identification to carry out aspects of their job in plant conservation. Each component of this project addresses specific aspects of Metro’s conservation program, from day-to-day management concerns to long-term scientific inquiry.
3
Aly, Radi, James H. Westwood, and Carole L. Cramer. Novel Approach to Parasitic Weed Control Based on Inducible Expression of Cecropin in Transgenic Plants. United States Department of Agriculture, May 2003. http://dx.doi.org/10.32747/2003.7586467.bard.
Full textAbstract:
Our overall goal was to engineer crop plants with enhanced resistance to Orobanche (broomrape) based on the inducible expression of sarcotoxin-like peptide (SLP). A secondary objective was to localize small proteins such as SLP in the host-parasite union in order to begin characterizing the mechanism of SLP toxicity to Orobanche. We have successfully accomplished both of these objectives and have demonstrated that transgenic tobacco plants expressing SLP under control of the HMG2 promoter show enhanced resistance to O. aegyptiaca and O. ramosa . Furthermore, we have shown that proteins much larger than the SLP move into Orobanche tubercles from the host root via either symplastic or apoplastic routes. This project was initiated with the finding that enhanced resistance to Orobanche could be conferred on tobacco, potato, and tomato by expression of SLP (Sarcotoxin IA is a 40-residue peptide produced as an antibiotic by the flesh fly, Sarcophaga peregrina ) under the control of a low-level, root-specific promoter. To improve the level of resistance, we linked the SLP gene to the promoter from HMG2, which is strongly inducible by Orobanche as it parasitizes the host. The resulting transgenic plants express SLP and show increased resistance to Orobanche. Resistance in this case is manifested by increased growth and yield of the host in the presence of the parasite as compared to non-transgenic plants, and decreased parasite growth. The mechanism of resistance appears to operate post-attachment as the parasite tubercles attached to the transgenic root plants turned necrotic and failed to develop normally. Studies examining the movement of GFP (approximately 6X the size of SLP) produced in tobacco roots showed accumulation of green fluorescence in tubercles growing on transformed plants but not in those growing on wild-type plants. This accumulation occurs regardless of whether the GFP is targeted to the cytoplasm (translocated symplastically) or the apoplastic space (translocated in xylem). Plants expressing SLP appear normal as compared to non-transgenic plants in the absence of Orobanche, so there is no obvious unintended impact on the host plant from SLP expression. This project required the creation of several gene constructs and generation of many transformed plant lines in order to address the research questions. The specific objectives of the project were to: 1. Make gene constructs fusing Orobanche-inducible promoter sequences to either the sarcotoxin-like peptide (SLP) gene or the GFP reporter gene. 2. Create transgenic plants containing gene constructs. 3. Characterize patterns of transgene expression and host-to-parasite movement of gene products in tobacco ( Nicotiana tabacum L.) and Arabidopsis thaliana (L.). 4. Characterize response of transgenic potato ( Solanum tuberosum L.) and tomato ( Lycopersicon esculentum Mill .) to Orobanche in lab, greenhouse, and field. Objectives 1 and 2 were largely accomplished during the first year during Dr. Aly's sabbatical visit to Virginia Tech. Transforming and analyzing plants with all the constructs has taken longer than expected, so efforts have concentrated on the most important constructs. Work on objective 4 has been delayed pending the final results of analysis on tobacco and Arabidopsis transgenic plants. The implications of this work are profound, because the Orobanche spp. is an extremely destructive weed that is not controlled effectively by traditional cultural or herbicidal weed control strategies. This is the first example of engineering resistance to parasitic weeds and represents a unique mode of action for selective control of these weeds. This research highlights the possibility of using this technique for resistance to other parasitic species and demonstrates the feasibility of developing other novel strategies for engineering resistance to parasitic weeds.