handout 1 - seasons, should be used in permanent crops,...

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Herbicide Classifications 1. Herbicides – by action Selective Contact Non-selective Translocated 2. Herbicides – by placement (within time and space) Soil applied Foliar applied (Preemergence) (Postemergence) Early preplant Burndown Preplant Early post Preplant incorporated Post Preemergence Directed post 3. Herbicides – by activity (active life) Non-residual - better used as a post application Residual – active for one season or less Short-residual – active for a few days to a few weeks, use in most crops Long-residual – active for a few weeks to several months or more Persistent – active for one to two seasons Highly Persistent* - active for two or more seasons *Highly persistent herbicides that remain active longer than two growing
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Unformatted text preview: seasons, should be used in permanent crops, non-crop areas, or as an industrial herbicide Environmental concerns and possibly crop injury concerns increase as the residual activity of the herbicide increases. 4. Herbicides – by modes of action (families) 1. Growth Regulators – (PGR - Auxin regulators) 2. Amino Acid Synthesis Inhibitors – (ALS, EPSPS) 3. Grass Growing Point Disintegrators – (Lipid Synthesis Inhibitors -ACCases) 4. Pigment Inhibitors – (CBI - Bleachers) 5. Photosynthesis Inhibitors – (PSIs) 6. Cell Membrane Disruptors – (Contacts [some residuals]- PPOs) 7. Cell Growth Inhibitors – (Seedling Inhibitors)...
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This note was uploaded on 04/03/2011 for the course BTNY 304 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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