| Use | Norflurazon controls grasses, sedges, and rushes such as crabgrass, foxtail, goosegrass,
barnyardgrass, fall panicum, signalgrass, povertygrass, rice cutgrass, needlegrass, smokegrass,
spikerush, annual bluegrass, fescues, ripgut grass, ryegrass, wild barley, witchgrass, and many
broadleaf weeds, such as prickly sida, common purslane, ragweed, spurred anoda, carpetweed,
Florida purslane, cheeseweed, chickweed, false dandelion, fiddleneck, filaree, horseweed, London
rocket, pineappleweed, puncture vine, redmaids, Russian thistle, and Shepherdspurse.
Suppression or control for nutsedges, bermudagrass, quackgrass, groundsel, annual
morning-glory, cocklebur, common lambsquarters, sowthistle, and pigweed. Norflurazon has
practical crop tolerance for cotton, cranberries, citrus, apricots, cherries, filberts, nectarines,
peaches, plums, prunes, and walnuts.
To control grasses and broadleaf weeds in grape vines, cotton and soybeans , control of
grasses, sedges, and broadleaf weeds in cranberries.
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| Environmental Fate | Terrestrial fate: In sandy loam soil, at 5, 20, and 35 deg C,
4-chloro-5-dimethylamino-2-(alpha,alpha,alpha-trifluoro-m-tolyl)- 3(2H)-pyridazinone dissipation
was 10, 80 and 97 percent after 210 days and was converted to its monomethyl and demethylated
metabolites. At 20 and 35 deg C,
4-chloro-5-dimethylamino-2-(a,a,a,-trifluoro-m-tolyl)-3(2H)-pyridazinone exhihited a half-life of/
= 50 and 9 days, respectively. The half-life of norflurazon in soil was about 8 months. The
demethylated metabolite of norflurazon was observed.
TERRESTRIAL FATE: The average half life of norflurazon residues in soil from theDelta and
Southeast is 45 to 180 days depending on clay and organic content.
TERRESTRIAL FATE: In soil 50% loss occurs in 21-28 days according to soil type and
method of application.
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