Recent emergency management measures for cotton

The light and heat conditions in the early part of this year are favorable for the growth of cotton, but the recent low temperature and light, overcast and rainy weather are extremely disadvantageous to the growth of cotton, and the shedding of buds and bolls increases obviously. At present, it is a critical period for the formation of cotton yield. in order to seize high cotton yield, the following management measures should be strengthened:

1. Supplementary application of top fertilizer and foliar spraying fertilizer for cotton fields with more bolls and premature senescence fields, urea 5-7.5 kg per 667 square meters, foliar spraying fertilizer can also be combined with insect control.

2. Rational pruning and chemical control due to the recent high number of Rain Water, which caused poor ventilation and light transmission in the cotton field, it is necessary to push plants and ridges. At the same time, 98% of thalidomide is used for every 667 square meters in Wangchang cotton fields, 98% 1-2 grams per 667 square meters in robust cotton fields, and 0.5-1.0 grams per 667 square meters in poor cotton fields, which is best carried out after fertilization and before irrigation.

Third, integrated pest control to strengthen the control of cotton bollworm, blind Toona sinensis, whitefly, etc., pyrethroids, organophosphorus and other pesticides can be used alternately, and pay attention to the protection of natural enemies, usually after 5 o'clock in the afternoon. For Fusarium wilt and Verticillium wilt, prevention should be given priority to. At the initial stage of the disease, 500 times 25% of the drug solution can be used to irrigate the roots, 50-100 ml per diseased plant, and the more severe fields can be reperfused at intervals of 5-7 days. at the same time, 0.2% potassium dihydrogen phosphate solution plus 1% urea solution was used for foliar spraying every 5-7 days for 2-3 times.