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2. Preemergent herbicide - Wikipedia

   en.wikipedia.org/wiki/Preemergent_herbicide

   To prevent growth of crabgrass, preemergent herbicides must be applied at a critical time. If they are applied to the soil too early, they get washed too deep into the soil or washed away by rainwater. If they are applied too late, the key enzyme inhibited is no longer active. The best control requires a second application about 6–8 weeks later.

3. 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.

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. You basically get one chance and ...

5. How To Get Rid Of Crabgrass That's Growing In Your Lawn And ...

   www.aol.com/rid-crabgrass-thats-growing-lawn...

   Learn how to get rid of crabgrass and achieve a healthy, weed-free lawn. ... As for corn gluten, often sold as an organic pre-emergent product, it has 20- to 40-percent effectiveness. That means ...

6. Integrated pest management - Wikipedia

   en.wikipedia.org/wiki/Integrated_pest_management

   For example, weeds reproducing from last year's seed can be prevented with mulches and pre-emergent herbicide. [citation needed] Pest-tolerant crops such as soybeans may not warrant interventions unless the pests are numerous or rapidly increasing. Intervention is warranted if the expected cost of damage by the pest is more than the cost of ...

7. Pesticide application - Wikipedia

   en.wikipedia.org/wiki/Pesticide_application

   A manual backpack-type sprayer Space treatment against mosquitoes using a thermal fogger Grubbs Vocational College students spraying Irish potatoes. Pesticide application is the practical way in which pesticides (including herbicides, fungicides, insecticides, or nematode control agents) are delivered to their biological targets (e.g. pest organism, crop or other plant).