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 206 for “"weed control"”.
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Soybean Response and Weed Control With Flumioxazin, and Sorption, Degradation, and Weed Control With Isoxaflutole
… new herbicide for selective use in field corn to control a wide range of grass and broadleaf species. It exhibits a new mode of action, inhibition of 4-hydroxyphenylpyruvate dioxygenase, an enzyme found in the pathway for carotenoid biosynthesis. In field studies conducted in 1998 and 1999 at …
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Chemical weed control in transplanted tomatoes
Weed control in transplanted tomatoes with diphenamid, trifluralin, and paraquat was evaluated under field conditions on a predominantly Grosclose silt loan soil on the Virginia Polytechnic Institute Horticulture farm near Blacksburg, Virginia. The herbicides were used singularly and in certain …
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Soil solarization weed control in specialty crops
… soil disinfestation technique 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 …
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Decision Support Software for Palmer Amaranth Weed Control
… been identified as one of the most troublesome weeds, specifically for corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] producers in the southern United States. The use of herbicide technology remains the most widely used method of weed control, despite …
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Optimizing Foramsulfuron for Weed Control and Corn Tolerance
… a new sulfonylurea herbicide for postemergence control of grass and some broadleaf weed species in corn. Field studies were conducted to evaluate weed control and corn tolerance from postemergence applications of foramsulfuron in sequential and total postemergence (POST) herbicide programs. …
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Weed control efficacy and biodegradation characteristics of imazethapyr
… acid) was evaluated in the field for weed control in soybean (Glycine max) during 1985 and 1986. Imazethapyr at 0.05, 0.07, 0.10, and 0.14 kg ai/ha was applied preplant incorporated (PPI), preemergence (PRE), or postemergence (POST). Imazethapyr controlled 90% or more smooth pigweed …
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Economic, biophysical, and behavioral drivers for robotic weed control
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Double-crop corn (zea mays) weed control in Virginia
… In each experiment, dependent variables included weed control by species evaluated throughout the season, as well as weed biomass and corn yield evaluated at the end of the growing season. Generally, nonselective herbicides were not required in the double-crop system where atrazine was applied as …
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Soybean Maturity Group Tradeoffs: Irrigation, Weed Control, and Nitrogen Fixation
… a brief overview of the overall study covering weed control, irrigation needs and nitrogen fixation amounts across soybean maturity group. Chapter II will go into further detail outlining the first applied experiment dealing with weed control and irrigation issues. Alternative weed control …
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Herbicide evaluation for broadleaf weed control in direct-seeded broccoli
… in stand. All rates of oxyfluorfen completely controlled Venice mallow while only the 0.56 kg/ha rate of BAS 514 provided acceptable (>70%) control. Broccoli plants that survived preemergence applications of oxyfluorfen exhibited injury ranging from 32 to 97% 6 to 9 weeks after treatment. BAS …
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Rotational cropping after applying experimental herbicides for weed control in soybeans
Call number: LD2668 .T4 AGRN 1988 S65
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Rotational cropping after applying experimental herbicides for weed control in soybeans
Call number: LD2668 .T4 AGRN 1988 S65
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Efficacy of glufosinate and weed control in transformed corn and soybean
… Information on glufosinate efficacy on annual weed species is limited. The objectives of this research focused on defining use rates and application timings of glufosinate for effective weed control, evaluating weed control programs in tolerant corn and soybean, and characterizing foliar …
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Efficacy of Herbicides for weed control in Soyabean cropping systems of Zambia
… plus fenoxaprop-ethyl). Other treatments were no weeding and hand hoe weeding at 2 and 4 weeks after planting. Pre-emergence herbicides were applied soon after planting, while post-emergence herbicides were applied 22 days after planting. At Lilayi, pre-emergence herbicides gave excellent control …
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Efficacy of Herbicides for weed control in Soyabean cropping systems of Zambia
… plus fenoxaprop-ethyl). Other treatments were no weeding and hand hoe weeding at 2 and 4 weeks after planting. Pre-emergence herbicides were applied soon after planting, while post-emergence herbicides were applied 22 days after planting. At Lilayi, pre-emergence herbicides gave excellent control …
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Screening of herbicides for selective weed control in African marigold (Tagetes erecta)
<p>African marigold (Tagetes erecta L.) was screened for tolerance to preemergence and postemergence herbicides. Three preemergence herbicides, pendimethalin, bensulide, and trifluralin, had an acceptable margin of crop safety both in the greenhouse and in the field when applied at one, two, and …
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Process design for the production of maleic acid hydrazide for weed control
… of briers, bermuda grass, johnson grass, milkweed, red pine, ragweed, and honey locust in the Blacksburg, Virginia, area from May to August, 1956. The yield of maleic acid hydrazide was increased from 42.6 to 67.0 per cent when the maleic anhydride excess was increased to 20 per cent in the …
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Optimizing Laser and Liquid Nitrogen Treatments for Weed Control in Turfgrass Systems
The increasing prevalence of herbicide-resistant weeds and growing environmental concerns surrounding synthetic pesticides are driving innovation in non-chemical weed control technologies. This research evaluated two emerging approaches based on the premise of machine-vision-based, individual-plant …
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Between-row mower design for weed control in organically grown no-till soybeans
Weeds are a major challenge in organic no-till soybean production. They impair crop growth and result in yield loss. Innovative weed control methods need to be developed and experimented with in organic no-till agriculture to reduce weed density and improve organic yield. In 2017, mowing between …
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