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Appearance of Herbicide Resistance in a Weed Population
Through the repeated use of the same herbicide, weed populations can consist of susceptible (S)-biotypes that are controlled and herbicide resistant (R)-biotypes that are left behind to produce and return seed with the resistance characteristic back into the soil. This lesson will highlight the population dynamics of a mixed weed population, containing S- and R-biotypes, and compare and contrast the rate at which herbicide resistant weeds appear in a population under a diversity of selection pressures. This lesson will highlight the population dynamics of a mixed (herbicide susceptible and resistant biotype) weed population, and compare and contrast the rate of appearance of herbicide resistance in a mixed population under a diversity of selection pressures.
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Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 1 - Introduction
The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides were the f...
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Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 2 - Advanced
The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides are thoug...
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Herbicide Discovery and Screening
Historically, herbicides have been discovered by randomly screening collections of chemicals for activity on target weeds. While totally empirical, this approach has been surprisingly successful and ...
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Herbicide Resistance: Mechanisms, Inheritance, and Molecular Genetics
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Inhibitors of Aromatic Amino Acid Biosynthesis
This lesson will detail the biochemical mechanisms that are affected by herbicides which inhibit a plant’s ability to synthesize amino acids. The significance of amino acids and proteins will also b...
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Inhibitors of Branched Chain Amino Acid Biosynthesis
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Inhibitors of Fatty Acid Synthesis and Elongation
Fatty acid synthesis and fatty acid elongation are two parts of a critically important pathway in plants. The endproducts are essential components of cell membranes, waxes, and suberin. Two chemical f...
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Metabolism of Herbicides or Xenobiotics in Plants
This lesson will take an indepth view of how plants handle foreign chemicals (xenobiotics) such as herbicides. It will discuss the three main phases that plants use to handle toxic chemicals, which en...
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