6 points must be caught at the bud stage of cotton

Proper watering due to less rainfall and hot weather in northern China in mid-late June, it should be properly watered, but not too much, so as not to cause cotton to flourish and cause buds to fall off. Ploughing should be done in time after watering or heavy rain to promote the root system of the plant.

Topdressing to promote weakness is generally applied every 667 square meters of urea 5kg, potassium chloride 15kg 20kg, zinc sulfate 1kg, borax 1kg, in order to promote the plant to build a high yield shelf. When applying fertilizer, the fertilizer should be trenched and applied deeply about 15 cm away from the plant. Topdressing at bud stage should take care of weak cotton seedlings and promote the upgrading of weak cotton seedlings.

Scientific pruning and pruning should adopt the method of retaining leaf branches. when 2 or 3 fruit branches grow on the leaf branch, the tip of the leaf branch should be removed in time to promote its budding, flowering and bolling. It is generally carried out before and after June 20 to remove 4 early seedlings from 4 fruit branches in the lower part of cotton plant, or 2 to 3 fruit shoots in the lower part of cotton plant. Adjust the flowering date to around July 10, not the peach. The peak period of cotton boll setting and the period of high light efficiency of cotton leaves were synchronized with the local high temperature, rich light and abundant water periods.

Ploughing soil should be ploughed in time after hardening or watering, rain or snow. The ploughing in the bud stage should be deep, and the suitable depth should be 8 cm and 10 cm. For the cotton fields with the trend of overgrowth, the middle tillage depth can be increased to more than 10 cm in order to cut off part of the lateral roots, reduce the number of root groups and control the growth of stems and leaves.

Timely chemical control and chemical control should grasp the principle of "a small number of times, do not spray strong, spray waterlogging not spraying drought, spraying fertilizer not spraying thin", so as to avoid drug damage. Generally, from the bud stage, ketamine was used for 4 times, but the starting date and each dosage were different, mainly according to the situation of their respective cotton fields, the first chemical control varied from 0.1g to 0.5g per 667 square meters, and the minimum number of chemical control was 3 times. 6 times at most.

The main pests of controlling pests in cotton at bud stage are the second generation cotton bollworm, cotton aphid, red spider and blind Toona sinensis, etc. The prevention and control of the second generation cotton bollworm should be vigilant in the future. The second generation of blind Toona sinensis must also be found and used in time, and the adults moving into the cotton field should be killed before spawning, so as to avoid harm.