Occurrence And Control Of Main Diseases And Pests In Cotton Fields At Xiantao

Current cotton field

I. occurrence

1. Cotton Verticillium and Verticillium wilt: according to my station investigation, the present premature cotton field

2.

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%.

This year's cotton seedling stage is low temperature and rainy for a long time, and the occurrence of red spider in seedling stage is lower than that in the same 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.