Summer cotton refers to the use of short-season cotton varieties planted after the small age. Due to the late planting of summer cotton, not only the plants are small, but also the growth period and the effective boring period are relatively short. The plant height is generally only 70 to 80 cm, the whole growing period is 100 to 120 days, and the effective boring period is only 30 to 40 days. Under many adverse conditions, how to seize the high yield of summer cotton, comprehensive years of experience should grasp the following key:

Early extermination, early harvesting of wheat after harvest, early culling of crop cultivars, prevention and control of weeds, summer cotton due to interplanting and cropping, generally too late to apply base fertilizer, so early fertilizer, combined with stubble cultivator Mushi diammonium 20 kg, potassium 15 kg, boron , zinc fertilizer 0.5 to 1 kg.

Timely control in order to prevent the growth of summer cotton, pay attention to early cultivator, multiple cultivator, and deep cultivator in the seedling stage, and to timely and well control, the first time in the three-leaf period, use 20PMM ~ 40PPM dilute amine solution spray Application, spray until; the second chemical control should be carried out in the seedling stage, generally 0.5 ~ 0.8 g with dilute amine; the first time in the initial flowering period, 1 ~ 2 grams of mu with dildoinosine; the third time in Hua bell flourishing period, mu with 2 ~ 3 grams of dilute amine; the fourth in the top 10 days after the top, mu with 3 ~ 5 grams of dildo. However, according to local conditions, the principle of looking at the heavens, seeing the land, seeing the seedlings, and a few times is the principle.

Timely control of diseases and insect pests The disease of summer cotton seedlings is relatively light, but the later verticillium wilt is relatively heavy. The occurrence of insect pests in the second generation of H. armigera was lighter, and the third generation of H. armigera and H. falciparum were heavier and should be measured and reported for early prevention and control.

Do a good job ripening summer cotton general frost pre-flowering rate is low, it is necessary to carry out artificial ripening in time, first, ethephon ripening, generally in October 5th -10th, with 4 ~ 6 acres of ethephon. The second is to pull dry ripening, should be after October 15th, when the average temperature is lower than 15 °C when the dry out ripening, not only affect the yield and seed wheat, but also improve the quality of cotton.

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