1983—1987年对土壤耕作层温度的变化规律、土壤内棉枯、黄萎病菌的清长动态以及夏季盖膜晒地防治棉枯、黄萎病的效果进行了研究。盖膜四十余天,可使病株率从95.5%下降为2.5%,病情指数从67.24%下降为1.3%,棉花产量增加136.1%。0、5、10和25cm 的地温分别可达到50—68℃、45—55℃、37—46℃、36—45℃。棉枯萎菌历时36天可全部被杀死,棉黄萎菌历时27天可全部被杀死。 The changes of soil tillage temperature from 1983 to 1987, the dynamics of cotton bollworm and Verticillium dahliae in the soil, and the effect of cover film drying in summer on cotton bollworm and Verticillium wilt were studied. For more than 40 days, the rate of diseased plants decreased from 95.5% to 2.5%, the disease index decreased from 67.24% to 1.3%, and the cotton yield increased by 136.1%. Ground temperatures of 0, 5, 10 and 25 cm respectively reach 50-68 ° C, 45-55 ° C, 37-46 ° C, 36-45 ° C. Fusarium wilt cotton all 36 days can be killed, cotton Verticillium wilt 27 days all can be killed.