When the Meiyu season comes, cotton should be prevented and treated as soon as possible.

At present, the cotton seedling situation has entered the budding stage, but also entered the annual plum rain season. According to meteorological data, from May 30 to 31, some major cotton-producing counties, cities and districts in Wuhan, Xiaogan, Suizhou, and Ezhou received more than 100 mm of rainfall, causing torrential rain in some cotton fields, and cotton seedlings in depressed areas of some cotton fields were flooded. While cotton seedlings suffer from waterlogging, diseases and grass damage follow one after another. The "three evils" of cotton hit cotton farmers at the same time. According to the survey, there are now more than 100 weeds per square meter in some cotton fields, and the grass is higher than cotton seedlings, and weeds compete with cotton for fertilizer, glory and living space. Although it clears up after the rain, the air humidity is very high and the temperature drops, which is suitable for the occurrence and damage of Fusarium wilt. Fusarium wilt has emerged in some old cotton fields with residual Fusarium wilt and some non-disease-resistant varieties, and serious cotton seedlings have withered and died, resulting in missing seedlings and breaking ridges. If the "three evils" are allowed to prevail, it is bound to lead to a reduction in cotton production and harvest. In the face of the "three evils" that have occurred in cotton fields, the vast number of cotton farmers must be prevented as soon as possible, and the potential "three evils" must also be prevented as soon as possible. Specific measures are as follows: first of all, to swing waterlogging, help seedlings wash seedlings. The torrential rain has exposed that the water systems of some of our cotton fields are not enough, especially in some new cotton fields. The water system facilities in some old cotton fields are also aging. Fortunately, the drought is serious in the previous period, and there is not much water in various reservoirs, which is conducive to pumping and draining waterlogged water.Therefore, leaders of cotton areas at all levels should promptly organize farmers to swing waterlogged water and improve water system facilities. At the same time, farmers are organized to help and wash the flooded cotton seedlings quickly. According to past years' experience, as long as the cotton seedlings that return to water in time, straighten up and wash them with a sprayer, topdressing and raising the seedlings when the soil moisture is appropriate, the cotton seedlings can soon return to normal growth. Secondly, it is necessary to apply both fat and medicine to prevent illness early. The application of bud fertilizer can supplement cotton nutrition and enhance cotton stress resistance, and organic fertilizer can be applied to improve the ability of Fusarium wilt resistance. In particular, the application of organic compound fertilizer has a good function of inhibiting bacteria, improving soil and improving soil fertility. At the same time, the application of Pu K and fulvic acid pesticides can also control Fusarium wilt and reduce or alleviate the harm. Third, we should plough and hoe frequently and soak the soil with clean grass. The budding stage of cotton is also a favorable period for ploughing to break the hardening, and cotton fields with insufficient bottom fertilizer should also be combined with deep ploughing and broken boards to apply all kinds of fertilizers. For farmers planting insect-resistant cotton, special emphasis should be placed on the application of potash fertilizer, which is not less than 15 kg per mu. Deep ploughing should also be diligent in weeding, so that the soil is soaked and grass is clean, and the soil is empty and solid. For some large cotton growers, or farmers with insufficient labor, herbicides such as glyphosate can be sprayed on the wide line of cotton, but special attention should be paid to the plastic safety cover on the sprinkler to prevent killing weeds and killing cotton seedlings.