Causes and control methods of acute wilting of cotton after rain

Spring and summer is a rainy economy, cotton planting in the sudden sunny after the rain is very easy to appear acute withering phenomenon, serious will also appear dead trees, causing huge losses to cotton production. So what is the reason for the acute wilting of cotton? How to prevent and cure it? Let's take a look.

1. Soil anoxia

The rainy season can easily lead to soil waterlogging, resulting in poor soil permeability, serious soil consolidation, less oxygen content in the soil, insufficient oxygen supply to the roots, and asphyxiation of the roots for a long time. affect the normal absorption of roots, the longer the suffocation time, the more serious root damage, there will be acute wilting phenomenon.

Prevention and control measures: for the cotton field with stagnant water, it should be drained in time after rain. for the cotton field with waterlogging, it is necessary to loosen the soil in time, reduce the moisture of the topsoil, increase the soil permeability and make the root oxygen supply sufficient.

2. Improper fertilization

When applying too much fertilizer at one time, Rain Water dissolves the fertilizer after rain, but too much fertilizer leads to too high concentration of dissolved fertilizer solution, which will lead to reverse osmosis of cotton leaves and rapid withering of cotton leaves.

Prevention and control methods: pay attention to the amount of fertilizer, one time should not be excessive fertilization, when the leaf wilting phenomenon, strong medicine timely external fertilization, can use 0.2% potassium dihydrogen phosphate and 1% Mel 2% urea mixed solution, sprayed every other week, 2-3 times in a row, can alleviate the withering phenomenon.

3. Diseases and insect pests

The high humidity environment after rain provides favorable conditions for the development of diseases and insect pests, which can easily induce diseases and insect pests such as Fusarium wilt, Verticillium wilt, blind Toona sinensis and so on.

Prevention and control methods: after the rain, we should first do a good job of drainage measures, and then strengthen ventilation, reduce field humidity, so as not to induce diseases and insect pests. The fields with diseases and insect pests should be treated in time, and the corresponding chemical control should be sprayed to reduce the loss to the lowest. At the same time, through the method of fertilization outside the root, the environment will wither, so as not to affect the yield.

The above is the introduction of the causes and prevention methods of acute wilting of cotton after rain. I hope it can help you. If you want to know more about it, please follow us.