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Showing 1 to 20 of 40 for “"ragweed"”.
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Mechanism of Resistance in Common Ragweed to PPO-inhibiting Herbicides
… in a dual-targeting gene known as PPX2L. Common ragweed, from Delaware, was the third documented weed species that evolved PPO-inhibiting herbicide resistance. This thesis provides information on the resistance mechanism of this common ragweed biotype to PPO-inhibiting herbicides. Chi-square …
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Resistance to Als-Inhibiting Herbicides in Common Ragweed, Foxtail and Horseweed
… evolution of cloransulam resistance in common ragweed, which appeared in the same year as cloransulam was commercialized. The results revealed that resistance to cloransulam in common ragweed evolved in response to selection by ALS inhibitors other than cloransulam. Also, resistance-conferring …
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Evaluation of Glyphosate Resistant Giant Ragweed (Ambrosia trifida) in Ohio Soybean (Glycine max) Fields
… and 2012 to evaluate glyphosate resistant giant ragweed in Ohio soybean (Glycine max) fields. Specific objectives were as follows: 1) Determine the spatial distribution and incidence of giant ragweed (Ambrosia trifida) infestations in Ohio soybean fields at the end of the growing season; 2) …
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Avoiding Protoporphyrinogen Oxidase Inhibiting Herbicide Selection Pressure on Common Ragweed and Palmer amaranth in Soybean
Palmer amaranth (Amaranthus palmeri) and common ragweed (Ambrosia artemisiifolia) can cause detrimental soybean yield loss. Due to widespread resistance to glyphosate and ALS-inhibiting herbicides, growers rely on protoporphyrinogen oxidase inhibiting herbicides (PPO) such as flumioxazin applied …
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Climate Change And Ragweed Allergy Risk Assessment: A Study Of The Grand Forks Metropolitan Statistical Area
… unappreciated is the impact of climate change on ragweed (Ambrosia species) biology and the ensuing pathophysiology of human systems. Ragweed pollen is one of the primary causes of seasonal pollen allergy in the world. Allergic reactions to ragweed pollen can range from mild hay fever to …
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The Role Of Soil Microorganisms In The Resistance Of Giant Ragweed, Horseweed, And Common Lambsquarters To Glyphosate
… weeds of the midwestern United States: giant ragweed (Ambrosia trifida L.), horseweed [(Conyza canadensis (L.) Cronq.], and common lambsquarters (Chenopodium album L.). Through a series of greenhouse and lab experiments we determined that root colonization by soil microorganisms increased the …
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Chionodes mediofuscella (Clemens) (Lepidoptera:Gelechiidae), an indigenous insect infesting the seeds of giant ragweed (Ambrosia trifida L.) (Compositae)
Ragweeds are anemophilic composites belonging to the genus Ambrosia, and are the most important aeroallergens in North America. Ambrosia trifida L., giant ragweed, is a ruderal plant widely distributed throughout the eastern and central portions of North America. The greatest concentration of this …
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Feedback by the soil microbial community on the distribution of two weeds
… common sunflower (Helianthus annuus) and giant ragweed (Ambrosia trifida). These two plants generally follow opposite gradients of abundance from west to east in the northern United States, and I hypothesized that soil feedback can partially explain this pattern. In each of six states, sunflower …
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Metabarcoding pollen to identify allergenic species of grasses (Poaceae) and ragweed (Ambrosia spp.) across six monitored sites in South Africa
… only identify grasses up to the family level and ragweed (Ambrosia spp.) pollen to the genus level. This project aimed to introduce DNA metabarcoding techniques to classify and identify grass and ragweed species contributing to pollen allergies in various South African biomes. Methods Samples were …
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Metabarcoding pollen to identify allergenic species of grasses (Poaceae) and ragweed (Ambrosia spp.) across six monitored sites in South Africa
… only identify grasses up to the family level and ragweed (Ambrosia spp.) pollen to the genus level. This project aimed to introduce DNA metabarcoding techniques to classify and identify grass and ragweed species contributing to pollen allergies in various South African biomes. Methods: Samples …
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Control and Fecundity of Palmer Amaranth (Amaranthus palmeri) and Common Ragweed (Ambrosia artemisiifolia) from Soybean Herbicides Applied at Various Growth and Development Stages
Palmer amaranth (Amaranthus palmeri) and common ragweed (Ambrosia artemisiifolia) are two of the most troublesome weeds in soybean. Both weeds possess widespread resistance to glyphosate and acetolactate synthase (ALS) inhibiting herbicides resulting in the use of protoporphyrinogen oxidase- (PPO) …
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Herbicide evaluation for broadleaf weed control in direct-seeded broccoli
… kg ai/ha provided excellent control of common ragweed with little or no visible crop injury. Common ragweed control with oxyfluorfen varied with soil moisture and organic matter. Applications of 0.28 and 0.56 kg/ha oxyfluorfen significantly reduced yield when compared to the cultivated check. …
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Evaluation of integrated weed management techniques and their nuances in Virginia crop production
… species, four broadleaf (redroot pigweed, common ragweed, common lambsquarters, and common cocklebur) and two grass species (large crabgrass and giant foxtail). Results indicate that among summer annuals, broadleaf species retain larger proportions of their seed compared to grass species at the …
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Understanding Plant Response to Stress Using Gene Model Quality Evaluation and Transcriptome Analysis
… resistance in <em>Ambrosia trifida</em> (giant ragweed). Giant ragweed is one of the most competitive annual weeds in corn and soybean production across the eastern Corn Belt in the United States. The use of glyphosate (commercial name: Roundup) and glyphosate-ready crop systems managed to keep …
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Weed management in conventional, no-till, and transgenic corn with mesotrione combinations and other herbicides
… smooth pigweed (Amaranthus hybridus L.), common ragweed (Ambrosia artemisiifolia L.), or morningglory species (Ipomoea spp.) in conventional tillage corn, but control of these weeds was generally improved in no-till corn. Mesotrione combinations with acetochlor did not always improve control of …
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Investigations on the Interations of Acetolactate Synthase (ALS)-Inhibiting Herbicides with Growth Regulator and non ALS-Inhibiting Herbicides in Corn (Zea mays) and Selected Weeds
… on common lambsquarters and common ragweed control in corn, (2) determine the effect of 2,4-D on the foliar absorption, translocation, and metabolism of 14C halosulfuron-methyl in common lambsquarters, (3) examine the interactions of 2,4-D, dicamba, and ALS-inhibitor herbicides with …
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Characterization of Acetolactate Synthase-Inhibiting Herbicide-Resistant Smooth Pigweed and Corn Weed Management Programs Utilizing Mesotrione in Combinations with Other Herbicides
… album</i> L.), smooth pigweed, common ragweed (<i>Ambrosia artemisiifolia</i> L.), and morningglory (<i>Ipomoea</i> spp.) species when a timely rainfall followed application. POST applications of mesotrione controlled common lambsquarters and smooth pigweed, but common ragweed and …
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