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Use of technology: Registration crop prevention methods target dosage administered non-cultivated weeds 100-160 g / acre directional foliage spray 1 hectare = mu preparation formulation amount amount × 15 2, weeding suitable period of weed basically a homogeneous, When the height is less than 15 cm; when the weeds grow to more than 30cm, the dosage should be doubled; to control weeds before sowing or after sowing before seedlings, can also be used to prevent unless arable land, ridge, roadside weeds. 3, the crop growing season, to take protective directed spray between the lines, such as corn, sugar cane, soybeans and other wide-row crops and nurseries; orchards, mulberry fields, tea plantations, rubber plantations, forest weed out together, in the growing season use. 4, controlling a variety of annual weeds, perennial weeds have a strong killing effect, no effect on the already brown woody stems and trunks. 5, the light can accelerate paraquat play efficacy, sunny spraying quick, one hour after the drug had no effect on the efficacy of rain; overcast or cloudy days, though shield delaying agents markedly speed, but ultimately does not reduce herbicidal effect. Field trials herbicide paraquat Figure hawks watered 15 kg 100 g in a bucket of water before clearing weeds rural Hubei temperature 12-20 degrees paraquat use and use hawks bags 100 g after 20 hours of Comparison Chart