After the rain became clear and sunny, some of the cotton fields appeared acute wilting and severe dead trees occurred, affecting cotton production.
Causes of acute wilting of cotton: First, the lack of oxygen in the soil. After waterlogging in the cotton field, the lack of oxygen in the roots will make the roots suffocate and affect the normal absorption function of the roots. The longer the suffocation time, the heavier the damage to the root system. The second is improper fertilization. One-time over-dressing caused excessive concentration of soil solution after rain, leading to reverse osmosis of cotton leaves.
In order to reduce losses, it is recommended that the cotton farmers should have the following measures in their management: The first is to drain them early. For cotton fields with accumulated water, after the rain, the water in the cotton fields should be promptly discharged out of the field. In the case of cotton fields where waterlogging occurs, it is necessary to promptly perform the breakage and drying of the cotton, reduce the surface humidity of the cotton fields, and improve the growth environment of the cotton fields. The second is top dressing. Foliage spraying 0.2% potassium dihydrogen phosphate plus 1% urea mixture, spraying once every 7 days, even spraying 2 or 3 times, can improve the wilting phenomenon of cotton. It is advisable to spray the leaves on the back after 4 pm or on cloudy days. The third is the timely prevention of pests and diseases. Generally after the rain, high temperature and high humidity can easily lead to the occurrence of cotton yellow wilt disease, rotten bell and cotton bollworm, blind borer and other pests. Can be combined with top dressing for prevention and treatment.
Dongguan City Risen Medical Products Co., Ltd. , https://www.risenppe.com