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Anionic surfactant A surface-active additive to a herbicide having a negative charge. Not commonly used with herbicides. ...
Annual A plant that completes its life cycle in 1 year; i.e., germinates from seed, produces seed, and dies in the same season. Examples include pigweed, ragweed, mustard, foxtail, and crabgrass. A winter annual is one that germinates in the fall, lives ...
Antagonism Opposing action of different chemicals such that the action of one is impaired or the total effect is less than that of one component used separately. ...
Antidote A first-aid treatment to counteract poisoning. ...
Aquatic plant A plant that grows in water. The three kinds are: Submergent grows beneath the surface; Emergent grows above the water (cattails and water lilies); and Floaters such as water hyacinth. ...
Band (row) application An application to a continuous restricted area, such as in, on, or along a crop row rather than over the entire field. ...
Basal treatment An application to the stems of plants at and just above ground line. ...
Berm Narrow shelf, typically along the water's edge of canals formed by deposited silt. ...
Biennial A plant that completes its life cycle in 2 years. The first year it produces leaves and stores food. The second year it blossoms and produces fruits and seeds. Examples include wild carrot, common mullein, bull thistle, and burdock. ...
Bioassay The qualitative or quantitative determination of the presence of a substance by response measurements of treated living organisms, as compared to measurements on the same untreated, check, or standard living organism. ...