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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.
Quinclorac is an herbicide used primarily to control crabgrass. [1] It is found in some household herbicides for lawn use. Most [citation needed] lawn maintenance companies use the product for the control of annual grass weeds like crabgrass. Quinclorac is a synthetic auxin.
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 If they are applied too late, the key enzyme inhibited is no longer active.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.
How to Kill Crabgrass Before Crabgrass Grows. Your best bet is to stop crabgrass before it starts. “Crabgrass is easily controlled using a pre-emergent herbicide,” Waltz says. “You must ...
[1] [2] [3] It kills crabgrass, the seedlings of which are especially vulnerable, but leaves most lawn grasses intact. [4] It exhibits anti-fungal activity against a broad range of ocular pathogenic fungi, with the greatest activity against Fusarium spp, and has been investigated as a potential treatment for keratomycosis. [3]
Dinitramine is a preëmergent dinitroaniline herbicide incorporated into soil to control weeds for months after. [2] [3] It is no longer approved in the U.S.A., and is not in the European Union, [4] though in Iran it has been used to control annual grasses and broadleaf weeds in cotton and soybeans, [5] as it was in the U.S. as of 1975, [6] where it was also used on sunflower.
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Proturk Goosegrass and Crabgrass Control and Anderson's Goose and Crabgrass Control both have bensulide as one of their active ingredients, along with oxadiazon at a concentration of 5.25% and 1.31% respectively. [3] Bensulide products may be used outdoors by homeowners on lawns and ornamentals, and by professional lawn care operators.
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