Cotton pest control
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Cotton pest control
The use of chemical pesticides to control cotton pests and diseases requires a proper dose. If the dose is too large, it will easily cause phytotoxicity to cotton; if the dosage is too small, the control effect will not be achieved. Therefore, the use of chemical agents to control pests and diseases of cotton (including other crops) must use appropriate control doses.
1. Cotton red leaf stem blight In the early stage of the disease, the leaf surface can be sprayed with 2% potassium dihydrogen phosphate or potassium chloride aqueous solution, sprayed once every 7 days, even spraying 2~3 times, can reduce the occurrence of red leaf stem blight .
2. The control of cotton aphid when the rate of coiled leaves is 5%~10%. 25% oxazolidine emulsifiable concentrate 1000~1500 times solution, 4.5% high-speed cyhalothrin 1000~2000 times solution, 10% imidacloprid wettable powder 2000~3000 times liquid targeted spray.
3. Helicoverpa armigera The third generation of cotton bollworms, 15 young larvae, and the fourth generation of cotton bollworm, 100 young larvae, 8 to 10 heads were controlled. Use 20% methomyl EC 1500~2000 times solution, 2.5% cypermethrin emulsifiable concentrate 1000 times solution, 50% bromophosphorus emulsifiable concentrate 1000~1500 times solution, 2.5% deltamethrin emulsifiable concentrate 1000 times solution spray control.
4. Cotton leafhopper (red spider) 10% strong liuyangmycin emulsifiable concentrate 1500~2000 times liquid, 20% broom emulsifiable concentrate 1000 times liquid, 1.8% avermectin (worm gram) emulsifiable oil 1500~2000 times liquid evenly Spray it.
Huaxian Agricultural Technology Promotion Center Sun Caixia
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