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 11 of 11 for “"PPO inhibitors"”.
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Characterization of PPO-inhibitor resistance in waterhemp (Amaranthus tuberculatus) and Palmer amaranth (Amaranthus palmeri)
… synthase (EPSPS) inhibitors to control these species led to the evolution of resistance to these herbicides and, thus, protoporphyrinogen oxidase (PPO) inhibitors were used to help control these resistant weeds. Waterhemp was the first weed species to evolve …
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Multiple Herbicide Resistance in Waterhemp
… treatment of several acetolactate synthase (ALS) inhibitors, and a POST application of lactofen, a protoporphyrinogen oxidase (PPO)-inhibiting herbicide. Greenhouse studies were conducted with this waterhemp biotype, and revealed that plants were also resistant to atrazine, a photosystem II …
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Exploring the mechanisms of Palmer amaranth resistance to protoporphyrinogen oxidase-inhibitor herbicides, dynamics of gender, and management strategies
… resistance to protoporphyrinogen oxidase (PPO)-inhibitors (e.g., lactofen and fomesafen) in a multiple-resistant Palmer amaranth population from Kansas (KCTR), 2) compare female and male life cycles of Palmer amaranth to identify differences that could be incorporated into management …
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Preemergence activity of chloroacetamide herbicides on a multiple herbicide-resistant population of waterhemp (amaranthus tuberculatus)
… groups including: acetolactate synthase (ALS) inhibitors, 5-enolpyruvyl-shikimate-3-phosphate (EPSPS) inhibitors, protoporphyrinogen oxidase (PPO) inhibitors, synthetic auxins, Photosystem II inhibitors (PSII), and 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors. Chloroacetamide …
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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
… in the use of protoporphyrinogen oxidase- (PPO) inhibitors to control these biotypes, although PPO-resistant biotypes are increasing. New soybean herbicide-resistant trait technologies enable novel herbicide combinations. Combinations of two herbicide sites-of-action (SOA) improved control …
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A waterhemp saga: Seed production, genetics, hybridization, and the creation and discovery of quad-stack individuals
… the crossing of a population resistant to ALS inhibitors, PPO inhibitors and PS II inhibitors with the glyphosate-resistant Missouri population) were investigated in Chapter 4 for the presence of four types of resistance, and individual plants were identified containing all four resistance …
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Evaluating cover crops and herbicides for horseweed and Palmer amaranth management
… in response to three Protoporphyrinogen Oxidase (PPO) inhibitors applied every three days once Palmer amaranth plants reached 2.5 cm tall. Cereal rye reduced weeds biomass by 78% and weed density by 75% by 8 weeks after cover crop seeding in the fall. At cover crop termination two weeks prior to …
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Population genetics of herbicide resistance in waterhemp
… that inhibit protoporphyrinogen oxidase (PPO) have been identified throughout the Midwest and the mechanism of resistance in populations from Illinois was previously determined to result from a 3 base pair deletion in the protoporphyrinogen oxidase (PPO)-encoding gene, PPX2. The deletion …
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A CHARACTERIZATION OF SELECTION FOR EVOLVED RESISTANCE TO PROTOPORPHYRINOGEN OXIDASE (PPO)-INHIBITING HERBICIDES IN AMARANTHUS TUBERCULATUS
… that inhibit protoporphyrinogen oxidase (PPO; EC 1.3.3.4) activity (PPO-R). Herbicides within this site of action (WSSA site of action #14) remain efficacious when soil-applied to PPO-R waterhemp populations. Therefore, the continued use of these herbicides for soil-residual control of …
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Characterization of HPPD-inhibitor resistance in waterhemp (Amaranthus tuberculatus)
… a review of the literature pertaining to HPPD inhibitors, namely their discovery and uses as herbicides, as well as a section on waterhemp biology. Chapter 2 discusses the initial greenhouse research used to determine if the waterhemp population from McLean Co. (designated MCR) had indeed …
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GENETICS OF GROUP 14 HERBICIDE TOLERANCE IN LENTIL
Extremely weak competition with weeds and limited herbicide options dictate the need to explore new avenues in weed control for lentil. Sulfentrazone and fluthiacet methyl are two herbicides of group 14 which have not previously been used in lentil production. Tolerance to these two products was …