The etiology of cotton diseases

Inferior seeds, low temperature, high humidity and extensive sowing are the factors of cotton disease.

1. Under climatic conditions, all kinds of pathogens of cotton diseases propagate rapidly under high humidity conditions, while low temperature is not conducive to the growth and development of cotton roots. In some early sowing cotton fields, under the condition of cold and rainy spring, young roots grow slowly, and pathogens are infected frequently, which is easy to cause rotten seeds and buds.

two。 Seed quality seed maturity is low, or damp mildew, easy to rot seeds, rotten buds; not only not conducive to seedling emergence, but also mostly weak seedlings after emergence, easy to be infected.

3. Tillage and cultivation measures continuous cropping cotton field accumulates more germs, which is more prone to disease than intercropping and rotation wheat field. The longer the years of continuous cropping, the more serious the disease. In the cotton fields with low-lying terrain and poor drainage, the soil moisture is high, the ground temperature is low, the ventilation is poor, the root system of cotton seedlings is not well developed, and it is easy to suffer from the disease; extensive soil preparation or tillage, rough soil, or too thick sowing cover all affect the emergence of cotton seedlings, and the disease is serious; sowing prematurely, the emergence of cotton seedlings is slow and easy to occur.