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Dissertations / Theses on the topic 'Diseases of the Onion'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Fournier, François. "Seuil économique et programme d'échantillonnage séquentiel pour le thrips de l'oignon (Thrips tabaci Lindeman) sur l'oignon." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69571.

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Very high infestation levels of Thrips tabaci Lindeman were observed on onions at Ste-Clotilde (Quebec) with seasonal means of 149 and 161 thrips/plant for 1988 and 1989 respectively. No significant differences in thrips densities were detected among six yellow onion cultivars (Capable, Flame, Norstar, Progress, Rocket, Taurus) through weekly comparisons in 1988 and biweekly comparisons in 1989.<br>A new variable, the cumulative number of thrips-days/plant, was used to model the impact of T. tabaci on onion yields. This variable allowed for better-fitted models, especially in 1989 where greate

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2

MacManus, Gerard P. V. "Development and extension of a disease forecasting and chemical control system for onion downy mildew /." St. Lucia, Qld, 2000. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16115.pdf.

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3

Parfitt, D. "Sclerotium cepivorum Berk. in onions : An investigation of alternative methods of control." Thesis, University of Hull, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377392.

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4

Southwood, Michael J. "Evolution and detection of Fusarium oxysporum f. sp. cepae in onion in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2010. http://hdl.handle.net/10019.1/4499.

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Thesis (PhDAgric (Plant Pathology))--Stellenbosch University, 2010.<br>ENGLISH ABSTRACT: In the Western Cape onion industry in South Africa, Fusarium oxysporum Schlechtend.:Fr. f.sp. cepae (H.N. Hans.) W.C. Snyder & H.N. Hans. (Focep) has been identified as the leading cause of harvest and storage losses. This pathogen is of world-wide importance and causes Fusarium basal rot of onions (Allium cepa), affecting all onion growth stages. No information is available on the evolution, genetic diversity, molecular detection and inoculum sources of the South African Focep population. Similar t

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5

Noronha, Christine M. (Christine Mary). "Effects of density and host plant type on fecundity and survival of Delia radicum (Bouché), D. Antiqua (Meigen) and D. Platura (Meigen) (Diptera: Anthomyiidae)." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41017.

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The effects of intraspecific and interspecific competition, host plant, and prior host plant experience on fecundity, rate of oviposition and mortality of adults and larval survival of Delia radicum Bouche (Cabbage Maggot (CM)), D. antiqua Meigen (Onion Maggot (OM)), and D. platura Meigen (Seed Corn Maggot (SCM)), were studied on cabbage, onion and bean plants.<br>An optimum density for maximum fecundity per female was observed when the four experimental densities were compared. This optimum density was higher on host than on non-host plants. CM females were host specific and did not oviposit

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6

Moore, William F. "Vic Onion." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1419072621.

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7

Dalal, Ketan. "Counting the onion." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80247.

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Iteratively computing and discarding a set of convex hulls creates a structure known as an "onion". In this thesis, we show that the expected number of layers of a convex hull onion for n uniformly and independently distributed points in a disk is theta( n23 ). Additionally, we show that in general the bound is theta( n2d+1 ) for points distributed in a d-dimensional ball. Further, we show that this bound holds more generally for any fixed, bounded, full-dimensional shape with a non-empty interior. The results of this thesis were published in Random Structures and Algorithms (2004) [1].

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8

Pöhnl, Tobias [Verfasser]. "Influence of varietal onion composition on yield and quality of onion juice / Tobias Pöhnl." Düren : Shaker, 2020. http://d-nb.info/1217164197/34.

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9

Mullin, Joseph A. "Onion skins : a fall collection." Virtual Press, 1992. http://liblink.bsu.edu/uhtbin/catkey/845933.

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The poems in this collection are poems of discovery and explanation. They are the recordings and insights of what it means to be a young male in the North American Midwest in the year 1992. Some are memories of what was or what should have been. Some of the poems are attempts to give meaning to what is, or more importantly, to give meaning to the "who" that is becoming. The majority of the poems deal with opposing tensions, especially between society and the individual, and between knowing and the unknown. In almost all the poems there are two forces pulling at the narrator, and there is an ax

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10

Brice, John R. "Investigations into onion skin quality." Thesis, Cranfield University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320261.

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11

Hagler, James Robert. "Basic aspects of onion pollination." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184512.

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Difficulties in pollen transfer have adversely affected seed production of hybrid onion (Allium cepa L.) in the United States. Six onion cultivars were examined for differential attractiveness to the honey bee (Apis mellifera L.). Honey bees clearly discriminated between the onion cultivars in both open plots and caged plots. Nectar secretion, nectar sugar concentration, nectar sugar composition, mectar potassium content, and flower phenology were correlated with honey bee visitation. Nectar secretion rates ranged from 0.54 to 0.84 ul per floret per day. Onion cultivars also demonstrated diffe

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12

Hagler, J. R. "Hybrid Onion Seed Trial, 1987." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/214155.

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Successful seed production of open pollinated onion (Allium cepa L.) is difficult in Arizona. Providing adequate pollen transfer by honey bees (Apis mellifera) to ensure adequate seed set is a problem often encountered. Honey bees discriminate between onion cultivars. Onion flowers appear to be less attractive to honey bees than flowers of most competing plants. Bees may neglect the crop, particularly if another highly attractive plant species is in bloom. This honey bee discrimination has led to poor onion seed yields. This report compares seed production among five onion cultivars in Tucson,

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13

Umeda, K., C. Fredman, B. McGrath, and T. Pettigrew. "Dry Bulb Onion Variety Trial." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221448.

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14

Chope, Gemma Amy. "Understanding the mechanisms behind onion bulb dormancy in relation to the potential for improved onion storage." Thesis, Cranfield University, 2006. http://hdl.handle.net/1826/1501.

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Onion (Allium cepa L.) is the most economically important Allium crop. Onion cultivars adapted for growth in temperate regions require long days for bulb initiation, so the summer crop is stored over-winter. Deterioration in store is largely due to resumption of growth. Extended storage of onions is currently dependent on the synthetic sprout suppressant maleic hydrazide, whose future use is uncertain due to pressure to reduce residues in foods. Abscisic acid (ABA) has previously been linked with dormancy in a relative of onion (A. wakegi). Bulb ABA concentration in three onion cultivars (viz.

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15

Clark, Lee J., Fred Harper, and L. Max Thatcher. "Onion Variety Trial, Safford Agricultural Center." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214114.

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In response to the request for alternative crop production information, 92 varieties of long-day onions were planted on the Safford Agricultural Center. Many varieties performed well, with the top variety yielding almost 480 cwt per acre. It appears that onions can be a viable alternative crop for some farmers in the upper Gila valley.

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16

Chini, Filippo. "Onion Routing e anonimato: il sistema TOR." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16425/.

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17

Sobeih, W. Y. A. F. "Factors controlling bulb developments in the onion." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370351.

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18

Umeda, K., and D. MacNeil. "Preemergence Herbicide Combinations for Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219959.

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Most herbicides applied alone preemergence (PREE) caused minimal crop injury (<10%) when furrow irrigated. Pendimethalin (Prowl) applied at 0.5 lb AI/A plus bensulide (Prefar) at 6.0 lb AI/A under sprinkler irrigation in Tolleson caused crop injury that was highly unacceptable and the crop stand was severely reduced. Onion yields were significantly reduced for the Prowl plus Prefar treatments. Prowl at 0.25 or 0.5 lb AI/A alone provided very good (>90%) weed control of all weeds. Combination treatments of Prowl plus other herbicides provided very good weed control but did not offer enhanced co

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19

Umeda, K., D. MacNeil, N. Lund, and D. Robertz. "Prowl and Prefar for Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219960.

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Pendimethalin (Prowl7) applied preemergence (PREE) at 0.25 to 0.50 lb AI/A caused no observable injury and did not affect yields of onions that were furrow irrigated . Prowl applied PREE at 0.50 lb AI/A caused significant crop stand and yield reduction compared to lower rates or the untreated check under sprinkler irrigation. Prowl applied preplant incorporated (PPI) at rates ranging from 0.25 to 0.75 lb AI/A did not significantly injure onions or cause a significant yield reduction. Combination treatments of Prowl plus bensulide (Prefar7) applied PREE did not cause any measurable crop height

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20

Clark, L. J., R. Walser, and E. W. Carpenter. "Fall Planted, Late Maturing Onion Variety Trial." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/220391.

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Thirteen late maturing onion varieties were planted in the fall of 1998 and grown in a replicated small plot trial on the Safford Agricultural Center. Bulbs were pulled and the tops removed in early June. Three NuMex varieties, Mesa, Starlite and BR1, produced the best yields. Yields are shown in tabular form together with size distribution and quality characteristics.

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21

Clark, L. J., F. Harper, and L. M. Thatcher. "Onion Variety Trial, Safford Agricultural Center 1986." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/221258.

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As a followup to the previous years onion variety trial (1), 23 of the more promising long-day varieties were retested along with 5 new intermediate-day varieties. The soluble salts and exchangeable sodium percentage were high (4340 and 28.1%, respectively) in the field where the onions were grown. This suppressed the yields significantly from the previous year. The top yielder produced 386 sacks (50 lbs) compared with 956 sacks in 1985. The top yielders from 1985, Durango and Inca, performed well again this year. The new intermediate-day varieties produced well also and seem quite promising.

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22

Hoepting, Christine Anne. "Pesticide interactions in the management of onion maggot, Delia antiqua (Meigen) and onion smut, Urocystis cepulae frost, in Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61907.pdf.

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23

Glue, Joshua Barnaby. "Engineering Allium White Rot Disease Resistance in Allium Species and Tobacco Model Species." Thesis, University of Canterbury. School of Biological Sciences, 2009. http://hdl.handle.net/10092/3513.

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Allium white rot (AWR) is a soilborne disease that seriously damages commercial cultivation of onion (Allium cepa) and garlic (Allium sativum) crops. The disease has been found everywhere onions are cultivated and at present no system of control has been found that fully prevents the occurrence of the disease. The fungus responsible for the disease, Sclerotium cepivorum, uses oxalic acid to kill Allium bulb and root tissue in growing onion and garlic plants. Research suggests recombinant oxalate oxidase and oxalate decarboxylase enzymes may be able to degrade this acid and confer resistance ag

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24

Walker, Ryan Lee. "Evaluation of short-day onion doubled haploid lines." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1185.

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25

ul, Haq M. Anwar. "White rot of onion-plant response and detection." Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367806.

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26

Umeda, K., G. Gal, and B. Strickland. "Timing of Postemergence Herbicides for Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219961.

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Bromoxynil (Buctril®) at 0.063, 0.094, and 0.125 lb AI/A was completely safe on onions treated at the early first true leaf stage of growth. Onions did not exhibit visual injury at 12 days after treatment (DAT) and height was not different from the untreated at 45 DAT. Melilotus officinalis (yellow sweetclover) was only marginally controlled by both Buctril and oxyfluorfen (Goal®). Goal provided better weed control with an earlier application timing at 0.063 lb AI/A than the later application at 0.25 lb AI/A. All herbicide treated onions yielded higher than the untreated. A rate response was o

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27

Umeda, K., G. Gal, and B. Strickland. "Evaluation of Preemergence Herbicides for Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221656.

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At three test sites, ethofumesate (Nortron®) at 1.0 and 2.0 lb AI /A was safe on onions. Nortron appeared to provide marginal control of light to moderate weed infestations of London rocket (Sisymbrium irio) at two sites. Pendimethalin (Prowl®) at 0.50 and 0.75 lb Al/A was safe on onions at two sites with furrow irrigation. At three sites with sprinkler irrigation, Prowl treatments caused as high as 62 to 88% stand reduction when sprinklers were used to incorporate the herbicide. Bensulide (Prefar0) injured onions at early rating dates and height measurements indicated that the plants were sho

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28

Umeda, K., G. Gal, and B. Strickland. "Preemergence Herbicide Combinations for Onion Weed Control Study." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221674.

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DCPA (Dacthal®) at 9.0 lb AI /A, the commercial standard herbicide, slightly reduced the number of plants and shortened the plant height compared to the untreated check. Preemergence (PREE) herbicide treatments that caused injury as height reduction similar to Dacthal included pendimethalin (Prowl®), propachlor (Ramrod®), metolachlor (Dual®), dimethenamid (Frontier®), ethofumesate (Nortron®), and benefin (Balan®). Visual observations did not indicate significant stand reduction or crop injury compared to plant counts. Treatments that caused minimal visible crop injury (<10 %) were Ramrod, Bala

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29

Clark, L. J., E. W. Carpenter, and L. M. Thatcher. "Onion Variety by Date of Planting Trial, Safford Agricultural Center, 1987." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/214154.

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Twenty onion varieties were planted on two different dates in March at the Safford Agricultural Center. Yields up to 780 50-pound sacks per acre were harvested, with the early planting generally yielding slightly more than the later planting. The earlier planting generally had more jumbo and large onions and fewer medium and small onions than the later planting. The highest yielding onions were yellow varieties compared to the two white and one red varieties, but premiums for the non-yellow onions at harvest compensated for the lower yields. Three intermediate-day onions were included in the t

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30

Umeda, K., and C. Fredman. "Dacthal® Herbicide Rate Comparison for Preemergence Weed Control in Onions." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221476.

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DCPA (Dacthal®) herbicide was applied preemergence (PE) to the soil surface after onion planting and no crop injury was observed for rates of 5.3, 7.5, and 10.5 lb. a.i. /A at one of two locations. Dacthal® gave good control of London rocket and cheeseweed (90 -94 %) at one location and marginal control at the second location (79 -85 %). Dacthal® did not exhibit a rate response to control the two weeds common to both locations. The lower rate of Dacthal® did not differ in efficacy compared to higher rates to completely control lambsquarters and nettleleaf goosefoot. All rates of Dacthal® margi

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31

Umeda, K., and C. Fredman. "Early Postemergence Herbicide Weed Control in Onions." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/221477.

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Oxyfluorfen (Goal®) herbicide at 0.125 to 0.25 lb. a.i./A applied postemergence (POST) to onions at the 3-leaf stage of growth effectively controlled London rocket, yellow sweetclover, and prostrate pigweed with marginal injury to onions. Earlier POST applications on 1- and 2-leaf onions caused injury and some stand reduction. Bromoxynil (Buctril®) herbicide at 0.25 lb. a.i./A applied early POST gave generally good weed control but did not adequately control sweetclover. Buctril® applied in clear weather did not injure 1-leaf onions but caused severe injury on 2- and 3-leaf onions when applied

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32

Umeda, K., and G. Gal. "Evaluation of Nortron® Herbicide for Preemergence Weed Control in Onions." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/221634.

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An exploratory field study was conducted to evaluate the efficacy and safety of Nortron® (ethofumesate) herbicide for potential use in an onion weed control program. A rate range of 1.0 to 2.5 lb AI/A applied preemergence (PREE) demonstrated good safety on onions and no injury or crop stand reduction was observed. Sowthistle was the most numerous weed present and Nortron did not reduce it relative to the untreated check. Dacthal® (DCPA) significantly reduced the number of sowthistle relative to the untreated and to Nortron treatments. Onion height was reduced by Dacthal about 40 %.

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33

Kamoi, T. "Developing an optimal method for producing a tearless onion." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/1008.

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People experience the irritating tearing and burning sensation of lachrymatory factor (LF, propanthial S-oxide) when cutting or chopping onion bulbs. LF is produced by lachrymatory factor synthase (LFS) specifically from 1-propenyl sulfenic acid, a breakdown product of trans-1-propenyl-L-cysteine sulfoxide (1-PRENCSO) by alliinase. This thesis describes strategies to produce a tearless onion by using RNA interference (RNAi) silencing. To determine whether a gene silencing cassette can silence lfs gene transcripts from onion (Allium cepa L.), a crop recalcitrant to genetic transformation, a gen

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34

Abayomi, Louise Anike. "Disposable pyruvate biosensors for routine assessment of onion flavour." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/5663.

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The UK-grown onion sector shows strong potential for growth through new product development as consumers become increasingly aware of the health and dietary benefits of fresh onion consumption. Prospects for the production of new, more palatable sweet onions will be boosted by the development of improved grower diagnostics for flavour standardisation. Growers require simple-to-use on-farm diagnostics to assure flavour quality. The introduction of pungency tests has led to increased mild onion sales, however currently tests are out-sourced and as a result costly. Through this Defra- (Department

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35

Wachowicz, Marcin. "Badanie wpływu wybranych cech i parametrów konstrukcyjnych maszyny do obierania cebuli na kształtowanie jej charakterystyk użytkowych." Rozprawa doktorska, Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy, 2021. http://dlibra.utp.edu.pl/Content/3222.

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Celem pracy było uzyskanie odpowiedzi na trzy problemy badawcze na drodze badań doświadczalnych opartych na własnej metodyce badań i wykonanych na oryginalnym stanowisku badawczym z wykorzystaniem materiału badawczego w postaci cebuli odmiany BONUS. Jako zmienne niezależne przyjęto: prędkość podawania materiału, głębokość nacięcia łusek, liczbę dysz powietrznych usuwających łuskę, odległość dysz powietrznych od materiału oraz ciśnienie powietrza zasilającego układ usuwania łusek. Zmienne zależne stanowiły: wielkość generowanych strat ilościowych, wydajność i skuteczność funkcjonowania maszyny

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36

Revanna, Roopashree. "Investigation into the functional nature of Frc locus conditioning fructan levels in onion." Thesis, University of Canterbury. Biological Sciences, 2012. http://hdl.handle.net/10092/8810.

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Frc, a major gene on chromosome 8, conditions fructan levels in onions (Allium cepa L). In order to assist genetic dissection of this locus, this study aimed to determine the factors influencing varying fructan levels in high- and low-fructan genotypes. Mapping families were developed and analysed to study the genetic architecture for the fructan trait, and to check the association of the identified variables with the Frc locus. To facilitate reliable and practicable sugar assays in onions, a newly-adapted high-throughput microplate enzymatic assay was validated in this study. The reliability

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37

Amjad, Muhammad. "Seed irradiation in relation to moisture content." Thesis, University of Salford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281596.

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38

Bitterlich, Iris. "Weed interference and weed control in cole crops and onion." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28920.

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Additive weed competition experiments were undertaken to study the effect of lamb's-quarters (Chenopodium album) interference on direct seeded broccoli. Lamb's-quarters (3, 8, 10, 12, and 15 plants m⁻²) began to affect broccoli growth 28 to 36 days after seeding. Decreases in crop growth increased with weed density as time after seeding increased. Yield data were fitted to a rectangular hyperbolic model which indicated that even one lamb's-quarters plant m⁻² could reduce total yield by 18 to 20 percent and marketable yield (head >10 cm across) by 22 to 37 percent. Lamb's-quarters reduced total

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39

Marrach, Debora Gonçalves Rodrigues. "Algoritmos de remoção para a estrutura de indexação Onion-tree." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/552.

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Made available in DSpace on 2016-06-02T19:06:10Z (GMT). No. of bitstreams: 1 5601.pdf: 3183108 bytes, checksum: 0ac17d1e4d1f1556e3258bf2bd169cf2 (MD5) Previous issue date: 2013-08-27<br>The Onion-tree is an efficient metric access method based on main memory for similarity search. The Onion-tree has already provided algorithms for insertion and processing of similarity queries (range query and k-nearest neighbors query). However, in the literature no algorithm has been proposed for removing elements in Onion-tree. For this index be incorporated into a database management system, it is necess

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40

Fundamenski, Wojciech R. "Tokamak edge plasma modeling using an improved onion-skin method." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0021/NQ45640.pdf.

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41

Ma, Fengshan. "Plasmodesmata and symplastic transport in onion (Allium cepa L.) roots." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0026/NQ51210.pdf.

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42

Vollmer, Emily R. "Cover Crop Mulches for No-till Organically Managed Onion Production." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-11062008-105026/.

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Combining the environmentally sound practices of reduced tillage and cover crop use with organic vegetable production systems requires management choices that are tailored to specific climate and crop combinations. In the southeastern U.S. summer cover crops can be grown through the fall until desiccation by frost. At this time a cash crop such as bulb onions (Allium cepa L.) can be grown using reduced tillage for over winter production. Field experiments were conducted on first year transitional (non-organic) land in 2006-07 and 2007-08. Cover crops of foxtail millet âGerman Strain Râ [Setari

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Taylor, Andrew. "Functional genomics of photoperiodic bulb initiation in onion (Allium cepa)." Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/2045/.

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Bulb initiation is a process which is photoperiodically driven, drawing parallels with flowering. Photoperiodic flowering is well characterised at molecular and genetic levels and occurs when photoreceptors interact with the circadian clock, regulating the expression of CONSTANS (CO), which itself regulates the expression of floral pathway integrating genes such as FLOWERING LOCUS T (FT), leading to floral initiation. Two genes which regulate CO transcription are FLAVIN-BINDING, KELCH REPEAT, F-BOX (FKF1) and GIGANTEA (GI). The onion genome is very large with a high level of duplication, prese

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Knowles, Tim C., and Charles Poole. "Evaluation of Preemergence Herbicides for Early Season Onion Weed Control." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219954.

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Two experiments were conducted to determine the efficacy and safety of soil applied broadcast preemergent herbicides including Nortron, Prowl, Prefar, and Prefar + Prowl combinations applied at planting to fall seeded dry bulb onions. Crop stand reductions ranging from 10 to 33 percent resulted from Prowl 3.3EC use rates of 1.2 and 2.4 pt/acre. Prowl 3.3EC applied at 0.6 pt/acre, Prefar 4E applied at 4 and 6 qt/acre, Nortron 4SC applied at 2 pt/acre, and the combination of 0.6 pt Prowl 3.3 EC plus Prefar 4E were safe on fall seeded onions. Prefar plus Prowl combinations also provided winter we

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Piñera, Bartolome Joanne. "Preparation, characterization and electroanalytical applications of carbon nano-onion modified surfaces." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/313993.

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La present tesi es va centrar en explorar noves estratègies de preparació i modificació de nanoarquitecturas basades en nanocebollas de carboni amb l'objectiu d'expandir les seves aplicacions mitjançant la construcció de nous sistemes de detecció amb propietats millorades. Aquests nanomaterials van ser preparats de manera controlada per escalfament de nanodiamant i van ser dipositats en superfícies d'elèctrodes. Es van obtenir dispersions en solució aquosa emprant interaccions supramoleculars i es van implementar en sensors per molècules petites, proteïnes i ADN amb alta sensibilitat. Encara q

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Bäckström, Nils. "Designing a Lightweight Convolutional Neural Network for Onion and Weed Classification." Thesis, Uppsala universitet, Avdelningen för visuell information och interaktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-341526.

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The data set for this project consists of images containing onion and weed samples. It is of interest to investigate if Convolutional Neural Networks can learn to classify the crops correctly as a step in automatizing weed removal in farming. The aim of this project is to solve a classification task involving few classes with relatively few training samples (few hundred per class). Usually, small data sets are prone to overfitting, meaning that the networks generalize bad to unseen data. It is also of interest to solve the problem using small networks with low computational complexity, since i

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Dahlqvist, Anton. "Tor - The Onion Router : En utvinning av lösenord i Tor-nätverket." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-23214.

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Uppsatsen bygger på en analys av en exit-nod i Tor-nätverket i syfte att efterlikna ett tidigare experiment från 2007. Experimentet går ut på att analysera den information som kommer genom nätverket för att leta efter okrypterade lösenord. Experimentet görs i syfte att påvisa de brister som finns i nätverket och i användarnas säkerhetsmedvetande. Arbetet utgår från frågeställningarna: Går det att utvinna känslig information från en exit-nod i Tor-nätverket. - Går det att utvinna okrypterade lösenord från en exit-nod i nätverket? - Vilka typer av tjänster tillhör lösenorden som upp

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Clark, Sonya A. "Molecular cloning of cDNA encoding alliinase from onion (Allium cepa L.)." Thesis, University of Canterbury. Microbiology, 1993. http://hdl.handle.net/10092/5632.

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Alliinase catalyses the release of a range of volatile sulphur compounds which are responsible for the distinctive flavour and odour of Allium species. Clones encoding this vacuolar enzyme were isolated by immunoscreening a cDNA expression library constructed in the vector λZAPII with mRNA extracted from sprouting A. cepa bulb shoots. Six clones were characterized by DNA sequencing. Four of the cDNA sequences (Alli6, 7, 8B and 9) were found to be identical apart from variation in the length of their 5' ends. These sequences contained three putative polyadenylation signals. A fifth clone, Alli4

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Dommisse, Elvira M. "Development of an Agrobacterium transformation system for onion (Allium cepa L.)." Thesis, University of Canterbury. Botany, 1993. http://hdl.handle.net/10092/5674.

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Onion (Allium cepa) bulbs of the New Zealand-bred cultivars 'Pukekohe Longkeeper' and 'Early Longkeeper' produced tumourous growths after inoculation with 25 virulent strains of Agrobactenum tumefaciens, A. rubi and A. rhizogenes. The majority of these tumours produced nopaline, indicating that tumour cells were transformed. Some excised tumours produced roots in sterile culture. Eight onion genotypes were screened in tissue culture for callus formation, regeneration of plantlets from callus and clonal multiplication by shoot proliferation. All genotypes could be clonally multiplied and four

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Dodge, Meghan N., and Robert F. III McKelvey. "Why the survivability onion should include Reliability, Availability, and Maintainability (RAM)." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37614.

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Approved for public release; distribution is unlimited<br>Reliability, Availability, and Maintainability (RAM) and Survivability are both diverse disciplines that explore how a system will perform when placed within an operational environment. This Joint Applied Project provides a qualitative analysis of the interconnectivity of RAM and Survivability. It shows that an in-depth RAM analysis ensures military personnel are better protected throughout the life cycle. Methodologies for improving reliability and maintainability are also presented, to include physics of failure, highly accelerated li

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