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CSS302-Lecture16 - I I Methods of Weed Control A...

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II. Methods of Weed Control A Cultural-Crop management to favor the crop and  disfavor the weeds. B Mechanical-The use of physical or mechanical  means to kill or suppress weeds. C Biological-The utilization of natural enemies for  the control of weeds. D Chemical-The use of chemical herbicides in weed  management.
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Herbicide Classification   I. Selectivity  II. Mode of Action III. Method of Application
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Herbicide Classification I. Selectivity A. Selective – kill ___________________     B. Non-selective - kill _______________ 1. Foliar active - absorbed through leaves  ex. glyphosate
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Herbicide Classification 2. Soil active – absorbed from soil Persistence in soil < 48 hr - ___________ > 2 yr. - ____________
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Herbicide Classification II. Mode of Action A. Systemic  - interfere with a ________________                           process in plants B. Contact - kill plant tissue on contact (disrupt  cell membranes)
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Herbicide Classification III. Method of Application A. Preplant B. _________________ C. Postemergence
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A. Preplant
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