How to prevent and control cotton boll rot

The reason for cotton boll rot is basically due to too many Rain Water in summer and poor ventilation, resulting in a variety of bacteria invading cotton and causing cotton boll disease. Cotton boll rot is the most common disease of cotton boll disease, which appears more or less every year, which will seriously affect the quality and yield of cotton. Then let's learn how to prevent cotton rotten bolls.

1. Timely drainage

When planting cotton, it is necessary to choose good land and soil preparation. Cotton has a relatively strong ability to resist drought and is greatly affected by water, so we should do a good drainage system during soil preparation and control and regulate the moisture in the field in time during cotton growth. It means that when there are more rainstorms in summer, we should go to the field to dredge the drainage system, discharge precipitation from the cotton planting land, improve the growth environment of cotton by artificial way, and prevent cotton boll disease caused by water in time.

2. Scientific density

When planting cotton, it is necessary to reasonably arrange the distance between rows and between plants. When cotton grows to a certain time, it will spread out, so it is necessary to avoid being too dense and the branches and leaves of cotton gather together. it leads to stuffy heat caused by airtight air, or wet and unventilated conditions caused by rain, which will also lead to rotten cotton. So the general planting density is that the distance between rows is about 50 cm, and the distance between plants is 30 to 40 cm.

3. Loosen the soil and apply fertilizer

In order to prevent cotton rot, we can also carry out intertillage and fertilization. The purpose of intertillage is to give the soil air permeability and evaporate heavy soil moisture. Generally, the time for intertillage is to choose sunny days. The fertilization of cotton field is generally the use of organic fertilizer, phosphate fertilizer, potassium fertilizer and the right amount of nitrogen fertilizer, which can make the cotton grow not particularly luxuriant, reduce the sense of thickness in the cotton field, get sunlight and have the effect of ventilation.

4. Scientific rotation

The reason for cotton boll rot may also be that cotton fields often do not grow crops, but are only used to grow cotton, so the ability of the soil to lift elder sister is not enough, so there will be a lot of diseases, if rotational farming is carried out, it can adjust the soil fertility and pH, which can effectively prevent the symptoms of cotton boll rot.

5. Chemical control

Chemical control is a chemical spray aimed at the comprehensive factors of rotten bolls of cotton. Rain Water is more common in July and August in summer and September in autumn, so it is necessary to spray to protect cotton. When spraying, it is usually sprayed to the middle and lower parts of the cotton. The commonly used agents are carbendazim 1000 times solution, 58% metalaxyl ·manganese zinc wettable powder dilution 600 times 800 times, 80% spray gram wettable powder 500 times dilution 500 times, 70% chlorothalonil wettable powder dilution 500 times, and so on.

6. Pruning and adjusting bolls

In fact, the purpose of pruning is to reduce the heavy feeling of cotton land, which is beneficial to the light and ventilation of cotton. Boll adjustment is mainly a regulation of the boll setting period and boll setting position of cotton. The general regulation method is to remove the flower buds on the lower one to four fruit branches of cotton or to remove the first and second fruit branches so as to reduce cotton boll rot.

The disease of cotton boll rot is easy to appear in cotton planting, so preventive measures must be taken during cotton planting. These are the prevention and control methods of cotton rotten bolls brought by the pro-agricultural network, of course, there are certainly some other prevention and control methods, but the most common measures are basically here.