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Journal articles on the topic 'Effect of light on weeds'

Author: Grafiati

Published: 4 June 2021

Last updated: 21 February 2023

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1

Maynard, Elizabeth T. "Effect of Light during Cultivation on Weed Emergence." HortScience 32, no. 3 (June 1997): 428F—429. http://dx.doi.org/10.21273/hortsci.32.3.428f.

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This experiment was conducted to determine whether light conditions during cultivation affect the number or species composition of emerging weeds. Plots were cultivated on 31 May 1996 under the following light conditions: 1) Ambient nighttime light (full moon) plus tractor headlights, 2) ambient nighttime light plus tractor headlights covered by transparent green film (green tractor lights), 3) ambient nighttime light with no tractor headlights, 4) ambient mid-day light. A fifth treatment was not cultivated at all, but was treated with glyphosate on 31 May to kill emerged plants. Results discu

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2

Yasin, Muhammad, Eva Rosenqvist, and Christian Andreasen. "The Effect of Reduced Light Intensity on Grass Weeds." Weed Science 65, no. 5 (August 14, 2017): 603–13. http://dx.doi.org/10.1017/wsc.2017.17.

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The effect of reduced light intensity on the growth and development of three common grass weeds, blackgrass, silky windgrass, and annual bluegrass, was studied. Two identical greenhouse experiments displaced in time were performed with six light levels aiming at 0%, 20%, 50%, 80%, 90%, and 95% shade corresponding to a mean daily light integral (DLI) of 12.4, 9.63, 7.13, 2.74, 0.95, and 0.69 mol m−2d−1in experiment 1 and 21.2, 18.0, 10.7, 3.71, 1.64, 1.20 mol m−2d−1in experiment 2. Climate screens of acrylic fabric were used to create the light levels. A DLI of 0.69 to 3.71 mol m−2d−1substantia

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3

MONDANI, Farzad, Farid GOLZARDI, Godarz AHMADVAND, Reza GHORBANI, and Rooholla MORADI. "Influence of Weed Competition on Potato Growth, Production and Radiation Use Efficiency." Notulae Scientia Biologicae 3, no. 3 (August 25, 2011): 42–52. http://dx.doi.org/10.15835/nsb336125.

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Weed management in potato production is one of the main cost and time consuming practices. Understanding the most effective time of weed control could reduce the costs and increase potato yield. Field study was conducted in the west region of Iran during 2006 to evaluate the effect of weeds damage in potato fields. Twelve treatments used consisted of six initial weed-free periods in which plots were kept free of weeds for 0, 10, 20, 30, 40 and 50 days after crop emergence (DAE), and then weeds were allowed to grow until harvest, and six initial weed-infested periods in which, weeds were allowe

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4

Nordby, Dawn E., Dustin L. Alderks, and Emerson D. Nafziger. "Competitiveness with Weeds of Soybean Cultivars with Different Maturity and Canopy Width Characteristics." Weed Technology 21, no. 4 (December 2007): 1082–88. http://dx.doi.org/10.1614/wt-06-190.1.

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Field studies were conducted in 2005 at five locations throughout Illinois to determine the effect of maturity date and canopy width characteristics of selected glyphosate-resistant soybean cultivars on competitive ability against weeds. Natural weed populations at all sites were allowed to compete with the soybean cultivars until the V1, V3, V5, or V7 growth stage and then removed with an application of glyphosate. Light-interception readings, weed control ratings, and soybean yield were all measured to compare cultivars. Cultivars of later maturities tended to withstand early season weed com

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5

Lotz, L. A. P., M. J. Kropff, and M. W. Groeneveld. "Modelling weed competition and yield losses to study the effect of omission of herbicides in winter wheat." Netherlands Journal of Agricultural Science 38, no. 4 (December 1, 1990): 711–18. http://dx.doi.org/10.18174/njas.v38i4.16559.

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Omission of application of various herbicides to winter wheat cv. Arminda, cv. Citadel, cv. Okapi, cv. Granada, cv. Sarino and cv. Tombola on clay and sandy soil in 1982-86 caused a significantly lower crop yield only when the densities of certain weed species were extremely high in spring. A dynamic model simulating the competition for light and water between broadleaved weeds and winter wheat was used to assess the observed small effects of weeds on yield in terms of the relative emergence time, physiological and morphological characteristics of weeds. Like the experiments, the simulations i

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6

Gallagher, Robert S., and John Cardina. "The effect of light environment during tillage on the recruitment of various summer annuals." Weed Science 46, no. 2 (April 1998): 214–16. http://dx.doi.org/10.1017/s0043174500090445.

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Weed seeds can require an exposure to light for induction of germination. Conducting tillage operations at night and thus preventing the photoinduction of germination has been proposed as a means to reduce weed emergence in agricultural systems. This research was conducted to evaluate night tillage as a weed management option and to determine which tillage operations have the greatest effect on light-mediated recruitment. Weed emergence was evaluated after conducting factorial combinations of day and night moldboard plowing and disking in the springtime from 1992 through 1995. The light enviro

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7

Buhler, Douglas D. "Effects of Tillage and Light Environment on Emergence of 13 Annual Weeds." Weed Technology 11, no. 3 (September 1997): 496–501. http://dx.doi.org/10.1017/s0890037x00045310.

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Seeds of many plant species require a brief exposure to light to induce germination. Modifying the light environment during soil tillage may alter weed emergence in agricultural systems. The objective of this research was to evaluate the effect of secondary tillage conducted during daylight and at night on the emergence of 13 summer annual weed species under the same soil and environmental conditions. Annual grass and large-seeded broadleaf species showed little response to light environment during tillage. However, emergence was often less when no tillage was conducted than with any tillage b

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8

Chen, Zhengqiang, and Zhaomin Ma. "A Review: The Survey of the Effects of Light on Weed Recognition." MATEC Web of Conferences 228 (2018): 04008. http://dx.doi.org/10.1051/matecconf/201822804008.

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Weeding is one of the important tasks in agricultural field management. With the development of society and information technology, automatic weeding has become a developing trend. The automatic recognition of weeds based visual is the important step. In this paper, the effects of lighting on green identification and weed identification algorithms are summarized. In order to improve the accuracy and stability of the identification of crops and weeds, some further worth problems in the study are also put forward. This will help further research on automatic weeding.

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9

Everaarts, A. P. "Effects of competition with weeds on growth, development and yield of soyabeans." Netherlands Journal of Agricultural Science 40, no. 1 (March 1, 1992): 91–107. http://dx.doi.org/10.18174/njas.v40i1.16531.

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Two field experiments were carried out in the inland Zanderij area of Suriname to study competition between soyabeans and weeds. The crop was kept weed-free or without weed control for increasing periods of time after sowing. An analysis of the growth and development of a crop with weed control and of a crop without weed control was obtained by making observations at the end of each period of time with or without weed control. Uncontrolled weed growth concentrated mainly between the rows. Competition with weeds reduced ground cover and LAI of the crop, leading to a lower weight and yield. Plan

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10

Johnson, Mark S., and Steven A. Fennimore. "Weed and Crop Response to Colored Plastic Mulches in Strawberry Production." HortScience 40, no. 5 (August 2005): 1371–75. http://dx.doi.org/10.21273/hortsci.40.5.1371.

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The phase out of methyl bromide has forced strawberry (Fragaria ×ananassa Duchesne) growers to consider the use of cultural methods such as colored mulches to enhance weed control. Black plastic mulch controls most weeds; however, black mulch often does not warm the soil as well as clear mulch. Soil warming with clear mulch is desirable for early season markets, but clear mulch does not control weeds. Neither black nor clear mulches combine the ideal weed control and soil warming characteristics required. Seven colored mulches, as well as clear, black and no mulch were evaluated in California

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11

Alptekin, Harun, Abdullah Ozkan, Ramazan Gurbuz, and Muhittin Kulak. "Management of Weeds in Maize by Sequential or Individual Applications of Pre- and Post-Emergence Herbicides." Agriculture 13, no. 2 (February 10, 2023): 421. http://dx.doi.org/10.3390/agriculture13020421.

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Weeds impose serious problems in maize (corn) production, resulting in reduced crop yields and lower profits for farmers. The adverse effects of weeds have been attributed to the competition with maize plants for light, water, and nutrients, which can result in reduced growth and yield of the crop. In this context, effective weed management is important to minimize the negative impact of weeds on maize production. This can be achieved through a combination of cultural, mechanical, and chemical control methods. The use of pre-emergence and post-emergence herbicides as sequential or individual a

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12

Dentika, Pauline, Harry Ozier-Lafontaine, and Laurent Penet. "Weeds as Pathogen Hosts and Disease Risk for Crops in the Wake of a Reduced Use of Herbicides: Evidence from Yam (Dioscorea alata) Fields and Colletotrichum Pathogens in the Tropics." Journal of Fungi 7, no. 4 (April 9, 2021): 283. http://dx.doi.org/10.3390/jof7040283.

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The transition toward sustainable agriculture requires rethinking cropping systems in the light of less intensive and chemically reliant practices. Weed management is one of the target practices to evolve cropping systems with decreased impact on the environment. While softened management will lead to increased weeds/crops coexistence, it is of importance to assess the relative benefits and drawbacks of new practices. Among the potential drawbacks of weeds/crops coexistence, disease risk may increase if weeds are hosting pathogens. In this study, we assessed the potential of weeds for hosting

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13

Jensen, Peter Kryger. "Effect of light environment during soil disturbance on germination and emergence pattern of weeds." Annals of Applied Biology 127, no. 3 (December 1995): 561–71. http://dx.doi.org/10.1111/j.1744-7348.1995.tb07612.x.

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14

Madandoust, Mehdi, and Ahmad Ranjbar. "Effects of solarization on critical period of weed control in sesame (Sesamum indicum L.)." Outlook on Agriculture 46, no. 4 (December 2017): 272–78. http://dx.doi.org/10.1177/0030727017744936.

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In order to determine the critical period of weed control in sesame, field studies were conducted during the 2014 and 2015 growing seasons in Estahban, Iran. The experiments were conducted based on factorial arrangement which involved a randomized complete block design with three replications. The first factor was conducted in two weed-infested and weed-free series until different phonological stages of sesame growth. These stages included a third pair true leaf initiation, first bud emergence, 50% opened flowers, and minor plants stop flowering, and the second factor was related to solarizati

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15

Živić, Jelica, Milić Vojinović, Ivica Stančić, and Desimir Knežević. "WEED FLORA IN ALFAFLA CROPS." International Conference on Technics, Technologies and Education, ICTTE 2019 (2019): 452–56. http://dx.doi.org/10.15547/ictte.2019.07.014.

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Alfalfa is a perennial crop that is grown several years on the same surface and because of this there are specificities in the composition and structure of the weed community. This leads to difficulties in suppresses and reduction of pests, diseases and weeds at the yield of alfalfa. The basic harmful effect of weeds is reflected through the competitiveness of water, nutrients and light. Weeds generally have low nutritional value, unpleasant smell and taste, and also affect the quality of alfalfa seeds. The most common types of economy effective perennial weed are Cirsium arvense (L), Sorghum

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16

Pavithra, M., and R. Poonguzhalan. "Weed flora of aerobic rice and their effect on growth, yield and nutrient uptake by rice Oryza sativa in the coastal region of Karaikal of Puducherry, India." Journal of Applied and Natural Science 10, no. 1 (March 1, 2018): 397–402. http://dx.doi.org/10.31018/jans.v10i1.1637.

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A field experiment was conducted at farm lands of Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal to know the weed floristic composition and their effect on growth, yield and nutrient uptake by aerobic rice (Oryza sativa). The results revealed that totally 29 species of weeds from 22 genera belonging to 17 families were noticed. Among them, four were grasses, six were sedges, and nineteen were broad leaved weeds. Of this 29 species, four were perennials, and the rest were annuals. During initial stages (30 DAS), sedges dominated (38.3%) whereas at later stages (

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17

Listyowati, Charisnalia, Didik Indradewa, and Siti Nurul Rofiqo Irwan. "Study on Weeds Abundance on Rice Fields in Mycorrhizal Inoculation and Different Planting Methods." Caraka Tani: Journal of Sustainable Agriculture 37, no. 2 (June 25, 2022): 259. http://dx.doi.org/10.20961/carakatani.v37i2.53131.

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<span lang="EN-US">The increasing demand for rice and the increasing population growth rate require sustainable rice production. Direct seeding of rice (DSR) combined with the use of arbuscular mycorrhizal fungi (AMF) is needed to achieve sustainable food production. This study aims to determine the effect of the planting method and mycorrhizal inoculation on the diversity, composition and dominance of weeds in a rice field for the sustainability of agricultural production. The research used a split-plot design with three replications. The main plot was the planting method consisting of

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18

Nelson, Kelly A. "Glyphosate Application Timings in Twin- and Single-row Corn and Soybean Spacings." Weed Technology 21, no. 1 (March 2007): 186–90. http://dx.doi.org/10.1614/wt-05-073.1.

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Field research was conducted in 2002 and 2003 to determine the effect of twin- and single-row spacing and POST glyphosate application timing on light interception, weed control, and grain yield of glyphosate-resistant corn and soybean. Row spacing did not affect light interception measured 10 to 11 wk after planting. Corn grain yield in 2002 was 1.0 Mg/ha higher in single rows compared with twin rows when averaged over glyphosate timing, but was unaffected by row spacing in 2003. Soybean grain yield was similar in 19- and 38-cm single rows, and single-row grain yield was 0.2 to 0.4 Mg/ha highe

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19

Blackshaw, Robert E., Louis J. Molnar, Duane F. Chevalier, and C. Wayne Lindwall. "Factors affecting the operation of the weed-sensing Detectspray system." Weed Science 46, no. 1 (February 1998): 127–31. http://dx.doi.org/10.1017/s0043174500090287.

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Field experiments were conducted for 3 yr to determine the effect of various biological and physical factors on the operation of the weed-sensing Detectspray system. Plant detection is achieved by sensors measuring differential reflectance of red and near-infrared wavelengths of light from green plants, crop residues, and soil. Weed detection was greatly reduced 70 to 80 min after sunrise and before sunset when operated at lat 50°N because of reduced solar irradiance. Tall, dense-standing crop stubble limited detection of small weeds at the soil surface. Weed detection varied with plant specie

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20

Salikhov, Talgat, Sagyntay Elubaev, Marat Tynykulov, Gulzhanat Kapbassova, and Anar Makhmutova. "The Effect of the Timing of Manure Application in Combination with Mineral Fertilizers and Planting Density on the Weediness of Potato Plantings." Scientific Horizons 24, no. 7 (December 29, 2021): 46–52. http://dx.doi.org/10.48077/scihor.24(7).2021.46-52.

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Potatoes are one of the most responsive crops for grooming techniques since in the period from seedlings before closing rows are easily suppressed by weeds that take away nutrients, water, light from it. The factor that causes high harm to potatoes is weed. By absorbing a large number of nutrients and moisture from the soil, weeds inhibit the growth and development of plants, reducing their potential productivity. The purpose of the study was to establish the effect of the timing of the introduction of bedding manure in conjunction with mineral fertilizers and planting density on the weediness

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21

Ribeiro, Victor Hugo Vidal, Marcos Antônio Da Silveira Júnior, Gustavo Antônio Mendes Pereira, Evander Alves Ferreira, Enilson De Barros Silva, and José Barbosa Dos Santos. "Total chlorophyll and nutrients content in bean plants and weeds in competition." Comunicata Scientiae 8, no. 2 (February 1, 2018): 307–15. http://dx.doi.org/10.14295/cs.v8i2.2173.

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Plants compete for several resources on soil, including water, light and nutrients which can affect crop yield and also weeds growth. Under the hypothesis that in different densities and weed communities, crops and weeds undergo changes in their nutritional contents of macro and micronutrients, the aim of this study was to quantify the nutritional contents of bean plants and weeds cultivated in increasing densities (0, 74, 147, 221 and 295 plants m-2) and the effect of the association of plants (isolated bean, bean + Urochloa plantaginea, bean + Bidens pilosa and bean + Urochloa plantaginea +

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22

Borger, Catherine P. D., Abul Hashem, and Shahab Pathan. "Manipulating Crop Row Orientation to Suppress Weeds and Increase Crop Yield." Weed Science 58, no. 2 (June 2010): 174–78. http://dx.doi.org/10.1614/ws-09-094.1.

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Crop rows oriented at a right angle to sunlight direction (i.e., east–west within the winter cropping system in Western Australia) may suppress weed growth through greater shading of weeds in the interrow spaces. This was investigated in the districts of Merredin and Beverley, Western Australian (latitudes of 31° and 32°S) from 2002 to 2005 (four trials). Winter grain crops (wheat, barley, canola, lupines, and field peas) were sown in an east–west or north–south orientation. Within wheat and barley crops oriented east–west, weed biomass (averaged throughout all trials) was reduced by 51 and 37

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23

Norsworthy, Jason K., Brandon W. Schrage, Tom L. Barber, and Lauren M. Schwartz. "Effect of Shading, Cultivar, and Application Timing on Cotton Tolerance to Glufosinate." Journal of Cotton Science 20, no. 3 (2016): 271–79. http://dx.doi.org/10.56454/kzvi4403.

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The increasing presence of glyphosate-resistant (GR) weeds in the Midsouth, and inconsistent crop injury and moisture dependence of residual herbicides has created a need for effective post-emergence options. Cotton cultivars with tolerance to glufosinate have been widely adopted by growers throughout the Midsouth because glufosinate provides an effective option for controlling GR weeds like Palmer amaranth (Amaranthus palmeri (S.) Wats.]. The objective of this study was to determine if differences exist in tolerance of PhytoGen® and Liberty Link® cultivars to glufosinate applied at different

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24

Wayman, Sandra, Craig Cogger, Chris Benedict, Doug Collins, Ian Burke, and Andy Bary. "Cover Crop Effects on Light, Nitrogen, and Weeds in Organic Reduced Tillage." Agroecology and Sustainable Food Systems 39, no. 6 (February 23, 2015): 647–65. http://dx.doi.org/10.1080/21683565.2015.1018398.

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25

Zaefarian, Faezeh, Zahara Shakibafar, Mohammad Rezvani, and Hamid SALEHIAN. "Effect of cover crops on maize-velvet leaf competition: leaf area density and light interception." Acta agriculturae Slovenica 107, no. 2 (October 26, 2016): 409. http://dx.doi.org/10.14720/aas.2016.107.2.13.

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<p>Cover crops influence on canopy structure and light interception of maize (<em>Zea mays</em> L.) and velvetleaf (<em>Abutilon theophrasti</em> Medik), was studied in a field experiment. Treatments included planting of bean (<em>Phaseolus vulgaris</em> L.), soybean (<em>Glycine max </em>(L.) Merr.) and berseem clover (<em>Trifolium alexandrium</em> L.) as cover crops at the same date and 21 days after maize. Sole cropping of maize under weed- free and weedy conditions were also included in this experiment. All tested cover cro

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26

Sharma, Neelam, Lokender Singh, S. Joshi, and Rajesh Manhas. "Dominance, diversity and species composition of the weeds of rice crop in Doon Valley." Journal of Non-Timber Forest Products 14, no. 1 (March 1, 2007): 63–69. http://dx.doi.org/10.54207/bsmps2000-2007-w0412d.

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Weeds have a direct effect on crop yields when they compete with the crop for nutrients, moisture and light. It is found infested with a variety of ways, which compete with the crop and often cause losses in grain yield ranging from 20-30%. During this study dominance, diversity and species composition of the weeds of Rice field in Doon Valley was studied. The study was conducted in the various Villages viz. Babugarh, Doctorganj and Bawanpur of the Vikasnagar block of Doon Valley in the month of August and September. A total of 24 weeds of rice fields were recorded in the selected sites. Linde

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27

Scavo, Aurelio. "Allelopathic effects of Cynara cardunculus L. extracts." Bullettin of the Gioenia Academy of Natural Sciences of Catania 53, no. 383 (November 17, 2020): MISC4—MISC5. http://dx.doi.org/10.35352/gioenia.v53i383.91.

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Weeds are recognized as the most important biotic factor affecting yields in agroecosystems. The negative effects derived from the irrational use of herbicides have led to an increasing interest to eco-friendly practices for weed control, including the manipulation of allelopathic mechanisms. The present study aims to explore the potential use of Cynara cardunculus L. leaf extracts for the biological control of weeds and pathogen microorganisms. In a first trial, the allelopathic effects of its leaf aqueous extracts were demonstrated on seed germination of six common weeds. Secondly, the set-u

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Singh, Kuldeep, Samunder Singh, and R. K. Pannu. "Temperature, pH and light effect on germination and growth behavior of grassy weeds of direct-seeded rice." Indian Journal of Weed Science 52, no. 1 (2020): 21. http://dx.doi.org/10.5958/0974-8164.2020.00003.9.

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29

Ohadi, Sara, Hamid R. Mashhadi, and Reza Tavakol-Afshari. "Seasonal Changes in Germination Responses of Seeds of the Winter Annual Weed Littleseed Canarygrass (Phalaris minor) to Light." Weed Science 57, no. 6 (December 2009): 613–19. http://dx.doi.org/10.1614/ws-09-084.1.

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Photocontrol of weeds requires knowledge about the response of weeds to light and its changes over time. Thus, littleseed canarygrass germination, as an important weed in winter crops, in response to the light environment was evaluated in seeds retrieved from different burial (10, 20, and 40 cm, under irrigated or nonirrigated conditions) or storage (room temperature 25 C and cold 3 C) conditions for 1 yr. Seeds buried in the soil showed a cyclical germination behavior when tested at 20 C, with high germination percentages (68%) occurring in August, October, and December and low percentages (1

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Patterson, David T. "Effects of Environmental Stress on Weed/Crop Interactions." Weed Science 43, no. 3 (September 1995): 483–90. http://dx.doi.org/10.1017/s0043174500081510.

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All environmental factors that influence plant growth potentially can affect the ability of weeds and crops to exploit the environmental resources for which plants compete. Stressful levels of environmental factors such as temperature, light, and water and nutrient availability influence weed/crop interactions directly and also may interfere with (or enhance) weed control. Weed and crop species differing in photosynthetic pathway (C3vs C4) are likely to respond differently to many of these factors. Long-term changes in the atmospheric concentrations of CO2and other radiatively-active “greenhou

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Ronay, Inbal, Jhonathan E. Ephrath, Hanan Eizenberg, Dan G. Blumberg, and Shimrit Maman. "Hyperspectral Reflectance and Indices for Characterizing the Dynamics of Crop–Weed Competition for Water." Remote Sensing 13, no. 3 (February 1, 2021): 513. http://dx.doi.org/10.3390/rs13030513.

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Understanding the spectral characteristics of crops in response to stress caused by weeds is a basic step in improving the precision of agricultural technologies that manage weeds in the field. This research focused on the competition between corn (Zea mays) and redroot pigweed (Amaranthus retroflexus), a common weed that strongly reduces corn yield. The aim of this research was to characterize the physiological changes that occur in corn during early growth because of crop–weed competition and to examine the ability to detect the effect of competition through hyperspectral measurements. A gre

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32

Milberg, Per, and Lars Andersson. "Seasonal variation in dormancy and light sensitivity in buried seeds of eight annual weed species." Canadian Journal of Botany 75, no. 11 (November 1, 1997): 1998–2004. http://dx.doi.org/10.1139/b97-911.

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We recorded germination in three different light environments (light, dark, and after a short light exposure) in eight annual weed species. Seeds were buried outdoors at the end of November 1994 and exhumed monthly from March 1995 to April 1996. All species exhibited substantial seasonal changes in dormancy level, and the patterns suggest that seeds of Papaver rhoeas germinate strictly in the autumn; Capsella bursa-pastoris, Descurainia sophia, Spergula arvensis, and Urtica urens mainly in the autumn; Chenopodium suecicum strictly in the spring; and Matricaria perforata mainly in the spring. L

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D, Kavitha. "ALLELOPATHIC POTENTIAL OF CYPERUS ROTUNDUS L. AND CYNODAN DACTYLON L. ON GERMINATION AND GROWTH RESPONSES OF SOME RICE CULTIVARS." Kongunadu Research Journal 2, no. 2 (December 30, 2015): 118–22. http://dx.doi.org/10.26524/krj107.

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Weeds are enemies to the crop plants and have harmful effects on agricultural crops due to several factors such as competition for space, light and nutrients and allelopathy. In the present study,various concentrations (0,5,10,15,20 and 25%) of whole plant aqueous extractsof weeds, Cyperus rotundusL.( Purple nut sedge) and Cynodan dactylon(L.) Pers. (Bermuda grass) were tested for assessing their allelopathic potential on seed germination and seedling growth of some rice (Oryza sativa L.) cultivars i.e.ADT-36,BPT5204 and IR-20 using pot culture experiments. The experimental results revealed th

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34

Brainard, D. C., and R. R. Bellinder. "Weed suppression in a broccoli–winter rye intercropping system." Weed Science 52, no. 2 (April 2004): 281–90. http://dx.doi.org/10.1614/ws-03-031r.

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Interseeded cover crops have the potential to maintain and improve soil quality, reduce the incidence of insect pests, and suppress weeds in vegetable production systems. However, the successful use of interseeded cover crops has been limited by their tendency to either inadequately suppress weeds or suppress both weeds and the crop. We hypothesized that in irrigated broccoli production, winter rye could suppress annual weeds through rapid emergence and shading, without adversely affecting the taller transplanted broccoli crop. In field experiments conducted in New York from 1999–2001, broccol

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35

Dhaliwal, Salwinder Singh, Sandeep Sharma, Arvind Kumar Shukla, Vivek Sharma, Makhan Singh Bhullar, Tarundeep Kaur Dhaliwal, Mohammed Alorabi, Saqer S. Alotaibi, Ahmed Gaber, and Akbar Hossain. "Removal of Biomass and Nutrients by Weeds and Direct-Seeded Rice under Conservation Agriculture in Light-Textured Soils of North-Western India." Plants 10, no. 11 (November 11, 2021): 2431. http://dx.doi.org/10.3390/plants10112431.

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The escalating scarcity of irrigation water, transplantation of rice on light-textured soils and labour cost acted as major drivers for the transition towards direct-seeded rice (DSR) cultivation from the conventionally flooded transplanting system. Despite these advantages, DSR is a challenge in light texture soil due to heavy weed infestation and a slight decline in crop yield. The weeds compete for nutrients and have an adverse effect on the growth and yield of crops. Hence, to assess the removal of macro and micronutrients by weeds and direct-seeded rice, a field experiment was carried out

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Chaudhary, Amit, Bishnu Bilash Adhikari, and Jiban Shrestha. "Effect of weed species on drought tolerant rice genotypes at Sundarbazar, Lamjung, Nepal." Open Agriculture 4, no. 1 (March 8, 2019): 65–78. http://dx.doi.org/10.1515/opag-2019-0006.

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Abstract Weeds compete with rice for water, nutrients, space and light. The effect of weeds on productivity of rice genotypes were studied at research field of Institute of Agriculture and Animal Science, Lamjung Campus, Lamjung, Nepal in 2016. Eight rice genotypes (IR-87684- 18-1-2-3, IR-83388-3-3-140-4, IR-8839-39-1-6-4, IR-87759-7- 1-2-3, IR-88966-22-1-1-1, IR-88839-3-1-2-2, IR-88869-2-2-2-2, and Sukhadhan-3) and two weed management practices (Weeded condition and non weeded condition) were studied in randomized complete block design (RCBD) with three replications. Results showed that weedi

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Tsvei, Ya, R. Ivanina, and Yu Dubovyi. "Ecological controlling weed abundance in winter wheat crops." Karantin i zahist roslin, no. 1 (March 19, 2020): 16–19. http://dx.doi.org/10.36495/2312-0614.2020.01.16-19.

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Goal. To study the effectiveness of fertilizers and crop rotation factor in controlling weed abundance in winter wheat crops. Methods. Long-term field and analytical. Results. Research data on the effectiveness of fertilizers and legumes predecessors in controlling weed abundance in winter wheat crops are presented. It has been established that the basis of weeding of winter wheat crops in the spring tillage phase was one- and dicotyledonous species, at the time of harvest — mostly by mass dicotyledonous. In the composition of the weeds, the largest competition for winter wheat cro

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Biramahire, Bienvenu, Kwame Sarpong Appiah, Seishu Tojo, Yoshiharu Fujii, and Tadashi Chosa. "Influence of Mowing and Trampling on the Allelopathy and Weed Suppression Potential of Digitaria ciliaris and Cyperus microiria." Sustainability 14, no. 24 (December 13, 2022): 16665. http://dx.doi.org/10.3390/su142416665.

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A long-term, sustainable solution to weed infestation is extremely desirable because weeds have the potential to reduce crop productivity and the aesthetic appeal of the environment. In this study, the impacts of mowing and varying degrees of trampling pressure on the suppression of weeds, alongside wound-induced changes in the allelopathic potential, of the rhizosphere soil and the root exudates of southern crabgrass (Digitaria ciliaris) and Asian flatsedge (Cyperus microiria) were evaluated under both field and greenhouse conditions. The field study results showed that all trampling treatmen

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Everaarts, A. P. "Effects of competition with weeds on growth, development and yield of groundnuts." Netherlands Journal of Agricultural Science 40, no. 1 (March 1, 1992): 73–90. http://dx.doi.org/10.18174/njas.v40i1.16530.

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Competition between weeds and groundnuts was studied in two field experiments in the inland Zanderij area of Suriname. The crop was kept weed-free or without weed control for increasing periods of time after planting. Observations made at the end of each period with or without weed control provided an analysis of the growth of a crop with weed control and of a crop without weed control. Uncontrolled weed growth was concentrated between the rows. Competition with weeds reduced ground cover and LAI of the crop. DM accumulation was affected, resulting in lower yields. Plant density and number of

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Fagundes Marques, Ricardo, Guilherme Sasso Ferreira Souza, Maria Renata Rocha Pereira, Sidnei Roberto de Marchi, and Dagoberto Martins. "Sowing depth and light intensity in the emergence and development of monocotyledonous weeds." Bioscience Journal 38 (September 23, 2022): e38083. http://dx.doi.org/10.14393/bj-v38n0a2022-60820.

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This study aimed to evaluate the effects of different sowing depths and light intensities on the emergence and development of the monocot weed species, Urochloa decumbens and Cenchrus echinatus, under field conditions. Each species constituted an experiment, and the experimental design was completely randomized with four replicates. The treatments were arranged in a 6 x 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four solar radiation intensities (100%, 70%, 50%, and 30%) obtained through the use of shading screens. Seedling emergence capaci

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Hassannejad, S., and A. R. Mobli. "Effects of Some Cover Crops on Light Extinction and Weed Coverage in Sunflower Field." Cercetari Agronomice in Moldova 47, no. 2 (July 8, 2014): 29–40. http://dx.doi.org/10.2478/cerce-2014-0014.

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Abstract In order to evaluate the effects of some cover crops on extinction coefficient and weed cover percentage in sunflower, a field experiment was conducted based on a randomized complete block design with nine treatments and three replicates at the Agricultural Research Station, Tabriz University of Iran, during growing season 2012-2013. Treatments were triticale, hairy vetch, rapeseed, triticale + hairy vetch, triticale + rapeseed, hairy vetch + rapeseed, application of trifluralin herbicide, and controls (weed infested and weed free without planting cover crop). Result indicated than on

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Kural, Leyla, and Reyyan Yergin Özkan. "Allelopathic potential of white cabbage on some plants." Plant, Soil and Environment 66, No. 11 (November 2, 2020): 559–63. http://dx.doi.org/10.17221/386/2020-pse.

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The aim of this study carried out in 2017–2018 was to determine the effect of white cabbage (Brassica oleracea L.), which is known to have an allelopathic effect on the germination of some weed and cultural crops seeds. In addition to weeds, Amaranthus retroflexus L., Chenopodium album L. and Solanum nigrum L., cultural plants such as Zea mays L., Beta vulgaris L., were used in this study. It has been shown that the seed germination rate was decreased by the increased concentration of white cabbage post-harvest leaves extractions, which were made with different concentrations of aqueous and me

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Albrecht, Alfredo Junior Paiola, Arthur Arrobas Martins Barroso, Henrique Fabrício Placido, André Felipe Moreira Silva, Leandro Paiola Albrecht, Fábio Henrique Krenchinski, Ricardo Victoria Filho, and Luisa Carolina Baccin. "Factors influencing the germination and emergence of tall windmill grass (Chloris polydactyla) and swollen fingergrass (Chloris barbata)." MAY 2020, no. 14(05):2020 (May 20, 2020): 795–801. http://dx.doi.org/10.21475/ajcs.20.14.05.p2243.

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This study characterized the germination of seeds of Chloris polydactyla (synonymy Chloris elata) and Chloris barbata at varying temperature, luminosity, soil texture and cover. The first experiment WAS conducted in laboratory to determine the temperature and light effects on germination of these species. The experimental design was a 2x7 factorial, where 2 represents the absence/presence of light and 7 temperatures 15, 20, 25, 30, 35, 40 and 45°C. The second experiment was conducted in greenhouse to determine effect of edaphic factors on seedling emergence, in a 3x6 factorial arrangement, con

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Kaizu, Yutaka, Tetsuo Shimada, Yusuke Takahashi, Sho Igarashi, Hiroyuki Yamada, Kenichi Furuhashi, and Kenji Imou. "Development of a Small Electric Robot Boat for Mowing Aquatic Weeds." Transactions of the ASABE 64, no. 3 (2021): 1073–82. http://dx.doi.org/10.13031/trans.14295.

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HighlightsA small, automatically guided electric robot boat was developed to control the growth of aquatic plants in lakes.The robot boat was able to mow without becoming entangled with aquatic plants due to the paddle propulsion mechanism.The average speed was 0.41 m s-1, and the lateral deviation from the set path was 9.4 cm.The growth restraint effect was confirmed using aerial images collected by a drone.Abstract. At present, aquatic plants are becoming a problem in various lakes. Aquatic weeds that grow to high densities cause decreases in the oxygen concentration in the water, accumulati

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Masiunas, John, Elizabeth Wahle, Laurel Barmore, and Albert Morgan. "A Foam Mulching System to Control Weeds in Tomatoes and Sweet Basil." HortTechnology 13, no. 2 (January 2003): 324–28. http://dx.doi.org/10.21273/horttech.13.2.0324.

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A foam mulch system was developed that can be applied as an aqueous mixture of cotton and cellulose fibers, gums, starches, surfactants and saponins and dries to an one inch thick mat. This mulch may overcome the difficulty in applying and lack of persistence with natural mulches. Foam mulch also has the advantage of being able to be incorporated into the soil without requiring disposal like some plastic mulches. The objective of our study was to determine the effect of foam mulch and its color on weed control within the crop row and on yields of basil (Ocimum basilicum) and tomatoes (Lycopers

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Batish, Daizy R., Harminder Pal Singh, Ravinder K. Kohli, Shalinder Kaur, Dinesh B. Saxena, and Surender Yadav. "Assessment of Phytotoxicity of Parthenin." Zeitschrift für Naturforschung C 62, no. 5-6 (June 1, 2007): 367–72. http://dx.doi.org/10.1515/znc-2007-5-609.

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Phytotoxicity of parthenin, a sesquiterpene lactone, was evaluated against four weedy species (Amaranthus viridis, Cassia occidentalis, Echinochloa crus-galli, and Phalaris minor) through a series of experiments conducted under laboratory or greenhouse conditions to assess its herbicidal potential. Under laboratory conditions, parthenin (0.5 - 2 mm) severely reduced seedling growth (root and shoot) and dry weight of test weeds. However, the effect was greater on root growth. Parthenin (1 mm) suppressed the mitotic activity in the onion root tip cells that could possibly be responsible for the

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Dias-Filho, Moacyr Bernardino. "Physiological responses of two tropical weeds to shade: II. Leaf gas exchange and nitrogen content." Pesquisa Agropecuária Brasileira 34, no. 6 (June 1999): 952–61. http://dx.doi.org/10.1590/s0100-204x1999000600005.

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Ipomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in the Brazilian Amazonia, Brazil, were grown in controlled environment cabinets under high (800-1000 µmol m-² s-¹) and low (200-350 µmol m-² s-¹) light regimes during a 40-day period. The objective was to determine the effect of shade on photosynthetic features and leaf nitrogen content of I. asarifolia and S. cayennensis. High-irradiance grown I. asarifolia leaves had significantly higher dark respiration and light saturated rat

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Papenfus, Heino B., Manoj G. Kulkarni, Martin Pošta, Jeffrey F. Finnie, and Johannes Van Staden. "Smoke-Isolated Trimethylbutenolide Inhibits Seed Germination of Different Weed Species by Reducing Amylase Activity." Weed Science 63, no. 1 (March 2015): 312–20. http://dx.doi.org/10.1614/ws-d-14-00068.1.

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Weeds pose a great problem to farmers worldwide, and controlling weeds demands a high input cost for herbicides and labor. Because of current environmental regulations, a limited number of herbicides are commercially available (with limited modes of action) to control weeds. Smoke water and the biologically active compounds isolated from smoke affect seed germination in a significant way. Smoke water (SW) and karrikinolide (KAR1, the germination stimulant isolated from smoke) have been tested extensively for their ability to promote seed germination in a vast array of plant species. In additio

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Karki, Tika Bahadur, Shrawan K. Sah, Resam B. Thapa, Andrew J. McDonald, Adam S. Davis, and Yajna G. Khadka. "Weeds and Their Effect on the Performance of Maize and Finger Millet in Mid-Hills of Nepal." International Journal of Applied Sciences and Biotechnology 2, no. 3 (September 25, 2014): 275–78. http://dx.doi.org/10.3126/ijasbt.v2i3.10790.

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Relay cropping of maize with fingermillet (maize/fingermillet) is the predominant cropping system for sustaining food security situation in the hilly regions of Nepal. In this region weed pressure severely reduces crop yields. Basic information on weed species composition, biomass production and their effect on crop yields and economics are lacking for this region. This information will be necessary to develop effective weed management strategies for the future. In light of this an empirical study was carried out in two representatives mid hill districts of Parbat and Baglung during summer sea

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Matyuk, Nikolay, Valery Polin, and Anton Ananyev. "Effectiveness of herbicides in the destruction of weeds and carrion of spring rapeseed in the link of the crop rotation of spring rapeseed - spring wheat in the conditions of the Tula region." АгроЭкоИнфо 3, no. 51 (June 27, 2022): 19. http://dx.doi.org/10.51419/202123319.

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Studies conducted in the production conditions of the Tula region have shown that the cultivation of spring wheat after spring rapeseed using technologies without the use of dump plowing at the early stages of crop development leads to a problem with the fall of spring rapeseed. As a weed, it rises simultaneously or earlier than spring wheat, develops faster, competing with the crop for nutrients, soil moisture and light. The task of the research was to determine the optimal timing of the use of various herbicides and their tank mixtures in order to destroy weeds and, above all, rapeseed carri

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