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A pre-emergence spray of herbicide being added onto a field of oilseed rape. Preemergent herbicides are a form of chemical weed control which prevent germinated weed seedlings from becoming established. In some areas of the world, they are used to prevent crabgrass from appearing in lawns. [1]
Pages in category "Preemergent herbicides" The following 18 pages are in this category, out of 18 total. This list may not reflect recent changes. ...
Pre-emergence herbicides are applied to lawns prior to weed seed germination. Our standard recommendations are Sept. 1-15 for cool season weeds and mid-February to March 1 for warm season weeds.
Trifluralin is a common pre-emergent selective herbicide, a dinitroaniline.With about 14 million pounds (6,400 t) used in the United States in 2001, [3] and 3–7 million pounds (1,400–3,200 t) in 2012, [4] it is one of the most widely used herbicides.
One other pre-emergent herbicide, Pendimethalin, also has post-emergent characteristics. It is used both to prevent germination of the same list of grassy weeds, also as a means of eliminating ...
One major complication to the use of herbicides for weed control is the ability of plants to evolve herbicide resistance, rendering the herbicides ineffective against target plants. Out of 31 known herbicide modes of action, weeds have evolved resistance to 21. 268 plant species are known to have evolved herbicide resistance at least once. [ 59 ]
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