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Metribuzin (4-amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one) is a herbicide used both pre- and post-emergence in crops including soy bean, potatoes, tomatoes and sugar cane. It acts by inhibiting photosynthesis by disrupting photosystem II. [2] It is widely used in agriculture and has been found to contaminate groundwater. [3]
Pendimethalin acts in both pre-weed-emergence and early post-emergence. Pendimethalin is absorbed into roots and shoots, inhibits cell division and prevents growth, [10] to prevent weeds from emerging, particularly during the development phase of the crop.
Pages in category "Post-emergent herbicides" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. A. Alloxydim; Q.
Post-emergent herbicides include active ingredients such as: Quinclorac. Fenoxaprop-p-ethyl. If left intact, crabgrass plants will get huge, with up to 11 to 12 tillers by midsummer. These mature ...
It is therefore effective only on actively growing plants and is not effective as a pre-emergence herbicide. Crops have been genetically engineered to be tolerant of glyphosate (e.g. Roundup Ready soybean, the first Roundup Ready crop, also created by Monsanto), which allows farmers to use glyphosate as a post-emergence herbicide against weeds.
Herbicide adsorption to soil colloids or organic matter often reduces the amount available for weed absorption. Positioning of the herbicide in the correct layer of soil is very important, which can be achieved mechanically and by rainfall. Herbicides on the soil surface are subjected to several processes that reduce their availability.
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