Rangeland Exam - Pesticides / Formulations

What are the seven modes of herbicide action listed in the study guide?

1. Growth regulators.

2. Amino acid biosynthesis inhibitors (AABIs).

3. Lipid inhibitors.

4. Seedling growth inhibitors.

5. Photosynthesis inhibitors.

6. Cell membrane disruptors.

7. Pigment inhibitors.

What are growth regulators, and what are some examples of them?

Herbicides that disrupt the normal hormone balance and protein synthesis of plants. An example of this would be Weedar-induced epinasty.

What do AABIs do?

Prevent the production of amino acids that form essential proteins.

What do lipid inhibitors do?

Prevent the production of fatty acids (which comprise the cell membrane necessary for plant growth).

What are seedling growth inhibitors?

What do they fucking sound like?

Organophosphates are _______ poisons, and have caused the greatest number of _______ pesticide poisonings.

1. Nerve.

2. Human.

Carbamates are _______ poisons, and have high _______ in water.

1. Nerve.

2. Solubility.

What are biorational pesticides?

Newer alternatives to chemical pesticides. Biorationals are more selective and are most effective against insects with certain feeding habits. BTI is an example of a biorational.

Can soil microbes affect pesticide efficacy?

Yes, although it’s strictly by accidental absorption.