A variety of weeds can occur during the growth of cotton fields. To prevent weeds in cotton fields safely, effectively, and economically, we must follow the principle of two kills and three supplements. The following is a detailed introduction to the three principles of cotton field herbicide weeding:
One is closed before weed buds
The seedbed bed closure time is selected before the cotton seedbed bed is covered with the cover film. The herbicide variety and usage can be selected: 90% Hess (Ethylamine) EC oil can be used for every 667 square meters, 40 ml to 50 ml, or 50% B. Oxalamide EC 75ml ~ 9o ml, or 48% cable (methalin) EC 150ml ~ 200ml, or 72% Dole EC 100ml ~ 200ml, or 24% Gore (ethoxyflufen) 12 ml a 18 ml spray on water. The field closure depends on the type of cotton field. The weeds in the winter field are dense and dense. It should be used in combination with glyphosate or paraquat herbicides to control winter weeds 20 days to 30 days before cotton transplanting. Mixed use. For the cotton field with the former crop, immediately after the harvest of the former crop, the above-mentioned pre-emergence herbicide plus 20% paraquat (such as gram-free, one fire) herbicide mixed spray is used. Glyphosate herbicides.
The second kill is the treatment of stems and leaves after weeds
1 In the cotton seedbed or field where the pre-emergence herbicide treatment or the pre-emergence treatment is not ideal in the dry weather, when the weed growth reaches the 3-leaf to 6-leaf stage, the stem and leaf treatment is used to weed. Seedlings or cotton seedlings with a plant height of less than 35 cm can only be weeded with selective herbicides that are safe for cotton. Variety and usage: Between 667 square meters with 5% fine grass emulsifiable concentrate 4oml ~ 60ml, or 10.8% high-efficiency grass can be emulsifiable oil 20ml ~ 30ml, or 15% refined to kill emulsifiable oil 4o ml æž· ml to water 15 kg to 30 kg spray. 2 Weeding techniques in transplanted cotton fields with cotton bud stage and plant height above 35 cm: directional spraying and weeding with glyphosate-based herbicides, 41% glyphosate water per 667 square meters (Nongda, Nongwang, etc.) loo ml ~ 200 ml or 10% glyphosate water 450 ml ~ 800 ml. When applying the medicine, a protective cover should be added on the nozzle to lower the nozzle to prevent the liquid from drifting to the cotton leaf to cause phytotoxicity. Between 667 square meters with 5% refined grass emulsifiable concentrate 60 ml ~ 80 ml + 90% Wones emulsifiable concentrate 60 ml, or 5% refined grass emulsifiable concentrate 60 ml ~ 80 ml plus 10% flufenacetate 20 ml ~ 30 ml spray on water 30 kg. During this period, weeding herbicides should be used with caution in the inter-row row weeding, otherwise cotton seedlings are prone to phytotoxicity.
Sanbu is a cotton field field flowering period herbicide application herbicide
For the sporadic weeds in the field, the herbicide herbicide glyphosate can be used, and the herbicide is applied by the method of patch combination. The usage is the same as the application method in the bud stage, and the dosage depends on the size of the area.
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