1. A continuous low-temperature and cold weather occurred before and after the frost fall last year, which directly affected the maturity of the cotton seeds, resulting in a low bud rate and weak germination potential of the cotton seeds in our county this year, which reduced the stress resistance of the cotton seedlings.
2. With the understanding and application of herbicides by farmers' friends, the amount of herbicides in cotton fields in our county has increased sharply this year. More than 95% of cotton fields in our county have been treated with trifluralin herbicides. Although cotton field herbicides control weeds in cotton fields, However, the use of herbicides in the early cotton field inhibited the growth of secondary roots of cotton seedlings, resulting in slow growth of cotton seedlings, cotton seedling disease resistance.
3. The recent low ground temperature and high soil moisture are conducive to the occurrence and infection of pathogenic bacteria in cotton seedlings. According to the meteorological department's forecast, in the near future, the county will once again experience a cold rain, and the occurrence of cotton seedling disease will further increase. In view of the above situation, in this year's disease prevention and treatment of cotton seedlings, the prevention and treatment methods of combining treatment with prevention, which is mainly based on treatment to supplement the resistance of cotton seedlings, should be adopted. The following principles should be mastered in the prevention and control:
1, choose the right road fungicides, at present our county market is used to control the seedlings of cotton seedlings rot root products are more, farmers must look at the purchase of the product packaging indicates whether there is "pesticide registration certificate and the active ingredient content of the product "General pesticide registration certificates begin with LS or PD. Products that are not indicated are fake and shoddy products.
2. After production tests in recent years, the most effective fungicides for the prevention and treatment of cotton seedling diseases are copper rosinate plus prochloraz and ethyl acetic acid, and the main products are: Pharmacological, immortal, and rickets. , Ethyl iodide and so on.
3. In order to improve the disease resistance and stress resistance of cotton seedlings, the plant endogenous hormone regulator Hua Lei Bao and Fengchan 293 can be added to the control.
4, specific prevention measures:
(1), 18% Protector or Mi Xian a bag plus Hua Lei Bao a watered 30 kg spray;
(2), 25% of rickets or a bag of iodine and 10 ml of garlic plus 293 bags of 30 pounds of water spray.
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