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 20 of 20 for “"Integrated weed management"”.
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Evaluation of integrated weed management techniques and their nuances in Virginia crop production
Herbicide resistant weeds are driving implementation of integrated weed management (IWM). A new tactic to manage weeds is harvest weed seed control (HWSC), which targets weed seeds retained on the plant at crop harvest and either destroys, removes, or concentrates them. Research is limited on the …
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Harvest Weed Seed Control: An Integrated Weed Management Strategy for Organic and Conventional Production Systems
Harvest weed seed controls (HWSC) destroy weed seeds that are retained by the plant at crop harvest, which would typically be spread by the harvester along with other field residues. HWSC exploits coincidental maturity between crops and weeds, so an experiment was designed to collect weed seeds as …
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Relationship between seed dormancy and persistence of seeds of annual ruderal species in the soil seedbank
… to seed persistence in soil is critical for weed control decisions in the integrated weed management systems. Many annual weed species have dormant soil seed banks (SSBs), and this may be an important mechanism for seed persistence in these species. Although the relationship between seed …
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Use of Harvest Weed Seed Control Strategies in Arkansas Soybean
<p>Today, most growers use chemical weed management programs; however, a sole reliance on herbicides will place more resistance selection pressure on the weeds to which the herbicide is being applied. As herbicide resistance continues to grow and rob growers of yield, alternative weed control …
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Crop Canopy Effects on Kochia Establishment in Crop Fields
… survival and seed production in order to develop integrated weed management recommendations that account for crop competition. Field and greenhouse studies were carried out in 2010, 2011 and 2012 in Brookings SD. The first experiment, sort to quantify the effect of crop canopies on kochia …
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Weed management practice selection among Midwest U.S. organic growers
Weeds are the most costly of all agricultural pests, reducing crop yields, quality and harvestability while simultaneously increasing management expenses. Restriction of synthetic herbicide use in organic agricultural systems increases the complexity of weed management, leading organic farmers to …
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Stewarding chemical control in tall waterhemp (Amaranthus tuberculatus) while foregoing statistical significance
… While chemical control is only one component of integrated weed management, it has proven to be extremely valuable and, therefore, we should prevent its loss. It is not reasonable to believe that applying more herbicides will stop the evolution of resistance to herbicides, but models and research …
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Soil solarization weed control in specialty crops
… for the control of crop diseases, nematodes and weeds. Target soils are tilled, irrigated to field capacity, covered, and sealed with transparent polyethylene (PE) plastic mulch during the hottest part of the year for a period of 4-6 weeks. Applied water in soil micropores is heated by high …
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Responses of selected chickpea cultivars to imidazolinone herbicide
Limitations to broadleaf weed management options in chickpea present obstacles for stable production. Even with low weed incidence, chickpea yield can be severely affected, creating need for an integrated weed management system. Due to zero-tillage commonly practiced in Saskatchewan, there is heavy …
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Weed seed destructor: A harvest weed seed control method to manage waterhemp in soybean
… J.D. Sauer) is the most common and troublesome weed in soybean (Glycine max [L.] Merr.) based cropping systems of the Midwestern United States (U.S.). Evolution of multiple herbicide resistance in waterhemp is an increasing concern for soybean producers in Iowa and across the Midwestern states …
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Cover crop programs, termination methods and timings, and suppression mechanisms on weed growth and competition
… of pesticides are all challenges for managing weeds in production agriculture. The use of cover crops (CC) has emerged as a promising integrated weed management tool to aid in weed suppression. There are many questions concerning the best management practices to reap the most benefits from CC. …
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Prickly Sida (Sida spinosa L.): Biology and In-Crop and Post-Harvest Management Programs
… in the southern U.S. and is a troublesome weed in many agronomic crops. In northeastern Louisiana on silty clay loam and clay soils, prickly sida seedling emergence began in early March when soil temperature reached 13.8 C and ceased in mid-October. Seasonal peaks in emergence were …
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Herbicide-based Weed Management Systems for Potato (<i>Solanum tuberosum</i>) and Wheat (<i>Triticum aestivum</i>) and Growth and Reproductive Characteristics of Smooth Pigweed (<i>Amaranthus hybridus</i>)
Integrated weed management involves the utilization of weed biology principles to develop effective and economical control strategies. This research involved investigations of herbicide-based weed management programs in potato (<i>Solanum tuberosum</i> L.) and winter wheat (<i>Triticum aestivum</i> …
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Investigating herbicide and cover crop interaction in weeds
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Weed resistance risk management in glyphosate-resistant cotton
… systems will have an effect on conventional 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 …
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Evaluating the Competitive Abiliy of Semi-leafless Field Pea (Pisum sativum L.)
… rotation because they are poor competitors with weeds. This thesis research was conducted to determine whether competitive differences exist among semi-leafless field pea cultivars and to determine the mechanism(s) driving competitive differences. Cultivars included in the studies were chosen on …
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Impact of arbuscular mycorrhizal fungi on crop and weed growth: potential implications for integrated weed managment
With the growing problem of herbicide-resistant weeds, efficient and environmentally friendly non-chemical weed control approaches are needed to develop multi-tactic integrated weed management (IWM) programs. Using soil microbes for weed suppression has been considered as one of the non-chemical …
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Exploring the potential of chaff lining in Virginia wheat and soybean production
Harvest weed seed control (HWSC) methods concentrate, remove, or destroy weed seeds captured by the combine during harvest. Furthermore, chaff lining uses a chute fitted on the back of a combine to concentrate chaff and weed seed therein into a narrow line. Since chaff amount increases with crop …
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Reduced Chemical Weed Control Options in Virginia for Corn and Turfgrass and Characterization of Sorghum halepense Expressing Multiple Resistance to Nicosulfuron and Glyphosate
Sustainable weed control in managed agricultural systems requires the judicious use of multiple weed control tactics and prevents over-reliance on any one tactic. In this context, sustainable weed management plays a critical role in the mitigation of one of agriculture's most pressing problems- …