Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Pre-emergence"”.
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The Response of Soybeans to Selected Pre-Emergence and Post-Emergence Herbicides
… checksum: 4b7afe6abd639624992037e9c9661e31 (MD5) Previous issue date: 1955
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Efficacy of Herbicides for weed control in Soyabean cropping systems of Zambia
… Ten treatments were used at both sites: three pre-emergence treatments (metribuzin plus metolachlor, oxadiazon and oxadiazon plus metolachlor) and five post-emergence treatments (fomesafen plus fluazifop-butyl, bentazone plus fluazif op-butyl, bentazone plus acif luorfen, acif luorfen plus …
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Efficacy of Herbicides for weed control in Soyabean cropping systems of Zambia
… Ten treatments were used at both sites: three pre-emergence treatments (metribuzin plus metolachlor, oxadiazon and oxadiazon plus metolachlor) and five post-emergence treatments (fomesafen plus fluazifop-butyl, bentazone plus fluazif op-butyl, bentazone plus acif luorfen, acif luorfen plus …
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Energetics of low-input corn production
… were compared. Broadcast application of pre-emergence herbicides required an energy expenditure of 1160 MJ fha. Cultivation of ridges to control weeds consumed 380 MJ/ha. Economic costs of ridge cultivation were $14/ha. Broadcast application of pre-emergence herbicides cost $49/ha.
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Potential for site specific management of Lolium rigidum (annual ryegrass) in Southern Australia.
… were related to misclassification due to the presence of other weed species or variability in crop growth. When these effects were accounted for, the correlations improved with R2 from 0.27 to 0.86. Four paddocks were monitored in three seasons between 2006 and 2009 to determine stability of …
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Respiration rates and Factors which Influence the levels of Carbohydrates and Lipids in Honey Bee Eggs (<I>Apis mellifera </I>Linnaeus)
… on day 3. Mortality results, as indicated by pre-emergence embryos, showed that 75% developed at 34°C compared to 37.5% at 36°C. Low temperatures of 28°C had 12.5% developing to pre-emergence stage while 50% developed at 31°C. Respiratory results showed significant differences (p=0.05) between …
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Cheatgrass (Bromus tectorum L.) management and native plant community recovery on sites selectively treated with Imazapic in Rocky Mountain National Park
… treatment plot. Reference plots were chosen to represent the desired final condition for each imazapic treatment site. Imazapic (23.6% a.i.) was applied to cheatgrass infestations post-emergence in 2008 (105 g a.i./ha) and pre-emergence in 2009 (105 g a.i./ha) and 2010 (70 g a.i./ha). Imazapic was …
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Biological control of seedling blight of winter wheat caused by Fusarium culmorum and microdochium nivale
… of these three fungi significantly reduced pre-emergence and post-emergence seedling death and disease severity, measured as the degree of stem base browning. In vitro, Groseum and G. catenulatum culture filtrates were highly inhibitory to mycelial growth of F. culmorum and Mnivale and also …
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Analysis of the Effect of Two Tillage Systems on Soybean (Glycine Max (L.) Merrill) Growth
… methyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one)) (pre-emergence herbicides) were used for weed control at rates 3.365 kg ha$\sp{-1}$ and 0.630 kg ha$\sp{-1}$ respectively. Prior to planting, NT plots were sprayed with glyphosate (N-(phosphonomethyl) glycine) (post-emergence) at 0.840 kg …
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Exploring the mechanisms of Palmer amaranth resistance to protoporphyrinogen oxidase-inhibitor herbicides, dynamics of gender, and management strategies
… and 3) understand the interactions between pre-emergence (PRE) herbicides in the absence or presence of cover crops dead (terminated two weeks prior to planting) or “green” (terminated at the planting day) as well as impacts on soybean yield. Dose-response assay confirmed resistance to …
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Developing methods of strip cropping cucumbers with rye/vetch
… in half the plot by critical manual weeding and pre-emergence herbicides applied in the other half in all treatments except the conventional system. Three-week interval staggered plantings of buckwheat to provide flowers for adult beneficial insects were also evaluated. Results obtained indicate …
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Weed resistance risk management in glyphosate-resistant cotton
… weed management practices, the weed species present and the risk of glyphosate resistance evolving in weed species. Therefore, it is important that the effects of these management practices, particularly a potential reduction in Integrated Weed Management (IWM) practices, be examined to …
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An investigation of pre- and post-emergence rots of garden peas and the results of trials with five fungicidal dusts as pea seed protectants
… investigations into the cause and control of pre- and post-emergence rots of garden peas (Pisum sativum) are presented. These investigations were conducted during 1937-1938 at Canterbury Agricultural College, Lincoln.
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Conversion of Exotic Cool-Season Grasslands to Restored Native Plant Communities Utilizing Herbicide Treatments
… necessary rates of Journey® herbicide applied pre-emergence to establish native grasses. Spring application of 0.07 kg ai/ha imazapic + 0.18 kg ai/ha glyphosate, 0.09 kg ai/ha imazapic + 0.25 kg ai/ha glyphosate, and 0.11 kg ai/ha imazapic + 0.31 kg ai/ha glyphosate and an untreated control …