Prevention And Control Of Main Pests And Diseases In Xiantao Cotton Field
current
I. occurrence
1. Cotton Verticillium Wilt and Verticillium wilt. According to my station investigation, the cotton blight and Verticillium Wilt in the early cotton field began to develop, and the rate of serious farmland disease was 20%. Weather forecast this year Meiyu period more rain, is conducive to the spread of Cotton Verticillium wilt epidemic.
2. Bug bug: the present bug has been spanferred to cotton fields to cause damage to cotton.
3. Aphids and spider mites: my recent survey shows that the aphid rate of cotton aphids is 0 to 30%, the average aphid rate is 9%, the number of aphids is 86, and the rate of rolled leaves in a few plots reaches 20%. Cotton this year
Two, prevention and control advice
1, cotton Verticillium and Verticillium wilt: prevention and control of Cotton Verticillium and Verticillium wilt is mainly controlled by agriculture. Chemical control: the old disease fields should be widely applied before the onset of the disease. Suggestions are as follows: (1) 80% times 1500 times of liquid medicine of ethyl allicin is sprayed or irrigated; second, 50% carbendazim 800~1000 times liquid spray or root irrigation. When the above medicaments are irrigated, 802 802 10 ml, 98% potassium dihydrogen phosphate 30 grams or 15 grams of potassium rich potassium can be added to each 15 kg of liquid medicine.
2. Bug bug: when the number of hundred insects reaches 10, 48% chlorpyrifos EC, 45% malathion EC, or 40% propoxorus EC, or 26% chlorofluoroacetamiprid water dispersible granules can be sprayed.
3. Aphids and spider mites: when the rate of aphids is 10%, it is recommended to use 25% imidacloprid 2000 times liquid or 3% acetamiprid to spray 1000 times.
When the mites rate reaches 14%, it is recommended that 3% avermectin wettable powder 2500 times liquid or 10.5% avermectin and tetranychin wettable powder 1500 times liquid spray.
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