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2. Preemergent herbicide - Wikipedia

   en.wikipedia.org/wiki/Preemergent_herbicide

   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]

3. Are Weeds Actually Bad For Your Lawn? - AOL

   www.aol.com/weeds-actually-bad-lawn-030000903.html

   Conventional lawn service treatments typically carpet the entire lawn with pre-emergent herbicides to prevent lawn weeds. These products kill both beneficial weeds like clover along with the more ...

4. Neil Sperry: It’s time for apply preemergent in Tarrant ...

   www.aol.com/neil-sperry-time-apply-preemergent...

   It’s time to consider applying preemergent weedkiller granules to your lawn if you’re hoping to prevent germination of crabgrass and grassburs this season. ... One other pre-emergent herbicide ...

5. Here's What Happens If You Don't Pull Fall Weeds Before Winter

   www.aol.com/lifestyle/heres-happens-dont-pull...

   The chemicals are particularly useful for broadleaf weeds in lawns because you don't want to end up with hundreds of holes where you dug up the weeds. Pre-emergent formulas are applied in late ...

6. Trifluralin - Wikipedia

   en.wikipedia.org/wiki/Trifluralin

   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.

7. Dithiopyr - Wikipedia

   en.wikipedia.org/wiki/Dithiopyr

   Dithiopyr is a preemergent herbicide for crabgrass control in turf and ornamental grasses. It is effective on 45 grassy and broadleaf weeds. [1] Dithiopyr inhibits root growth of susceptible weeds as well as turf grass and thus should be used only on established turf with a well-developed root system.