Cotton rotten bells, commonly known as buckwheat (mildew) peaches, occur almost every year to varying degrees. Therefore, on the basis of clarifying the conditions and causes of the occurrence of cotton rotten bells, comprehensive measures should be taken to prevent and control, and efforts should be made to minimize the losses.
First, the conditions and causes of cotton rotten bell cotton Rotten bell is caused by a variety of bacteria infected cotton bolls. In the summer and autumn and rainy years in the cotton area of ​​our province, the humidity in the cotton field is relatively large, the closed canopy is heavier, and the ventilation and light transmission are poor, which is suitable for the multiplication of pathogens. The disease is often serious and the cotton rotten bell is also serious. The main diseases of cotton boll are disease, anthracnose, angular spot disease, red rot, pinkish pink disease, and black fruit disease, among which the disease is the main disease type of rotten bell, accounting for 28.3% to 99.7% of the boll disease. The rainy days and rainfall in the province in late August are the key factors affecting the occurrence of cotton bollworm disease. During this period, there are 3 to 5 days of rain, and the disease will occur more severely. Extensive management of cotton fields, pruning or control measures are not timely, plant prosperous, etc., are conducive to disease.
Second, cotton rotten bell prevention measures
1. Rational fertilization: Apply organic fertilizer, phosphorus and potash fertilizers, and apply nitrogen fertilizer in an appropriate amount to prevent the cotton plants from prospering, reduce the closure of cotton fields, and improve ventilation and light transmission.
2, timely drainage: For low-lying, poor drainage, cotton fields, heavier water, should deepen the drainage ditch in order to speed up the drainage rate. Exclude the dark stains on the cotton fields and reduce the environmental conditions of cotton growth and development, achieve multi-crusted cotton, not premature aging, and reduce the damage caused by the bell disease. In addition, for cotton drainage and prevention of cotton lodging problems, soil cultivation before the flowering of cotton is also an effective agronomic measure and should be promoted.
3. Appropriate control: cotton fields with good fertilizer and water conditions are easy to prosper, and should be used in the early and mid-term of cotton growth to apply spraying in a controlled manner, regulate cotton growth, prevent cotton plants from growing in length, and reduce damage caused by bell disease.
4, adjust the bell: plastic film or cotton early cotton prunes too much, by taking effective measures to adjust the cotton boll period and the site of the bell, can reduce the rotten bell. Early-onset cotton promotes the removal of early buds on the lower 1–4 fruit branches or early removal of the first and second fruit branches.
5. Reasonable pruning: For cotton fields with too narrow row spacing and premature closure of the line, in order to lighten the field, to improve the light conditions and ventilation conditions in the lower and middle parts of the area, it is necessary to start playing as soon as possible, which can reduce the loss of boll bells and rotten bells.
6, cultivating loose soil: promote inter-row cultivating loose soil, remove the ground panel knot, reduce cotton field humidity, improve cotton growth environmental conditions, can reduce the cotton rotten bell.
7, picking the sun disease bell: the bell period of more than 40 days, the shell has faded yellow and began to appear dark spots of cotton bolls, before it was not bad harvest. The picked bolls were soaked in a 1% ethephon solution and then dried to obtain cotton with good bolls.
8. Intercropping: Intercropping with reasonable intercropping has obvious disease-preventing effects on cotton boll diseases. Wheat-cotton, cotton-vegetable, and cotton-cucumber are both cooked, and the disease prevention effect is good.
9. Chemical control: Chemical control is an important measure for the comprehensive prevention and control of cotton rotten bells, and targeted bactericide sprays are required. From August to September, when the weather forecast has rainy weather for consecutive days, spraying protection should be carried out in time. Spraying should be concentrated in the lower part of the cotton plant. The commonly used agents are carbendazim 1000 times, 58% metalaxyl MnZn WP can be diluted 600-800 times, 80% spray WP can be diluted 500-600 times, 70% chlorothalonil wettable powder dilution 500 times liquid and so on.
10. Emergency measures: If cotton reaches the late growth stage, there are too many rainy days, the cotton fields are too shady, and the humidity is too high, the problem of cotton rotten bells has not been effectively controlled (this situation is generally rare or the area is very small). After the cotton rotten bell and the impact on the development loss of the upper bolls, emergency measures should be taken. Remove the middle and lower old cotton leaves, or push the plant and ridge, thoroughly improve the air and light conditions of the cotton fields, reduce the humidity of the cotton fields, reduce the rotten bell, reduce the losses, and obtain the proper harvest. In particular, this measure should only be used as an emergency measure. If it is applied prematurely or uncomfortably, it will result in a decrease in cotton production and affect the fiber quality.
Various products of Chrysanthemum Tea, providing product images and basic parameters with each Chrysanthemum Tea and High Quality Chrysanthemum Tea;Chrysanthemum tea, is a flower made of chrysanthemum tea. Chrysanthemum tea after picking flowers, dried, sun drying, baking and other processes made. Chrysanthemum bitter, slightly cold, wind scattered heat, Liver eyesight and detoxification anti-inflammatory effect. We are a professional Chinese supplier of Chrysanthemum Tea, and look forward to your cooperation!
Chrysanthemum Tea
Chrysanthemum Tea,Relieving Summer Heat Tea,Mingmu Chrysanthemum Tea,Anti Radiation Chrysanthemum Tea
Ningxia ZhongYuanDa Agel Ecommerce Ltd. , http://www.freshwolfberry.com