Strengthening cotton classification management after rain

In view of the current complex cotton seedling status, in order to promote balanced growth and enhance the stamina, we should take corresponding measures to classify and guide, strengthen management, and strive to fight against disasters.

First, grab the season, and quickly fill the fertilizer. It is the main contradiction of cotton management to rush to apply fertilizer and topdressing, but it should be classified and implemented. For cotton that has been flowering and ringing, apply flower and bell fertilizer, apply 15 kg of compound fertilizer per acre, 10 kg of urea, and 15 kg of potash; for cotton that enters the prosperous period, apply 2000~2500 kg of decomposed organic fertilizer per acre, or organism. 50 kg organic compound fertilizer, 15-20 kg of inorganic compound fertilizer, 15 kg of potassium fertilizer, 10 kg of urea to be seriously de-fertilized, and urea or ammonium bicarbonate for cotton that has not yet been budded Rapid conversion and upgrading; for the serious boron deficiency, the holding boron is 200~250g per mu, and spraying 0.2% Su Le Boron 2~3 times.

Second, cultivating broken boards, speeding up weeds. After the rain, the cotton field is generally squashed, affecting the development of cotton roots. First, it is necessary to grab the deep sedge grass manually. Second, the large cotton planter can use the mechanical cultivating soil quickly. The third is chemical weeding. The directional spray can be used to spray the cotton wide. Apply 10% glyphosate or 20% paraquat. The former is 300~400 ml per mu, the latter is 200~300 ml per mu, and the weeds above 6 leaves can be increased. After the application of such herbicides, in case of drought, avoid flooding.

Third, prevention is prosperous and attention is paid to pests. After cotton topdressing, in the case of moderate-intensity rainfall, it is very easy to cause long and even madness. It is better to choose a plant growth regulator with a delayed type of auxin or a ketamine. At this time, the amount of auxin can be 6~8 ml per acre or 1.5-2 gram of ketamine, preferably a small number of times, not blind. Increase the amount. In recent years, some farmers have increased the amount of cotton planted, and the bellows has been reduced. This lesson should be learned. Insect pests, the first to be blind, or blind mites, should be used to control blind mites, 2% emamectin benzoate, 5% fipronil suspension.