Causes and Control measures of Cotton Bud and Boll shedding

The phenomenon of a large number of Lei Ling falling off often occurs in cotton production, which has a huge negative impact on the yield, which seriously leads to the failure of farmers' harvest and seriously affects the economic income. So what is the reason why cotton buds and bolls fall off? How to prevent and cure it? The following editor will share with you the causes and control measures of cotton bud and boll shedding in order to reduce bud and boll shedding and achieve high yield.

1. Variety reasons

The variety of cotton is diversified, and the degree of bud and boll shedding will be different because of its different Europe under the same planting conditions. In addition, blind bugs and cotton bollworms like to lay eggs on hairy varieties, resulting in serious damage to buds and bolls and a large number of shedding.

Control measures: when planting, it is necessary to choose smooth leaf varieties with more buds, strong boll setting and good comprehensive resistance. at this time, its adhesion to eggs is small and it is not easy to be blown off by Rain Water.

2. Lack of fertilizer

A large part of the reason for bud and boll shedding is related to lack of fertilizer. when nitrogen is deficient, it will lead to plant weakness, bud and boll shedding at the periphery and top, and excessive nitrogen fertilizer, which will lead to plant overgrowth, inhibit root absorption of other elements, and cause bud and boll to fall off due to lack of nutrition. Phosphorus deficiency is also an obvious phenomenon of bud and boll shedding. Cotton is sensitive to potassium, and many farmers do not pay attention to the application of potassium fertilizer, which leads to plant malnutrition and bud shedding, and boron deficiency will also lead to bud shedding.

Control measures: in order to reduce bud and boll shedding, prevent plant premature senescence and increase yield, it is necessary to apply fertilizer reasonably according to the growth stage of the plant to supplement its growth needs.

3. Planting is too dense

Planting density is too large, or plant growth is too prosperous, resulting in canopy closure in the field, but also lead to a large number of bud and boll shedding phenomenon, and excessive density will often cause serious damage to diseases and insect pests, resulting in the phenomenon of premature senescence in the later stage.

Prevention and control measures: planting should be reasonably close planting according to the fertility status and variety characteristics of the soil, and it is not advisable to increase yield blindly by density.

4. Diseases and insect pests

The main diseases causing cotton bud and boll shedding are Fusarium wilt or Verticillium wilt, which were more serious in the period of Rain Water, resulting in a large number of bud and boll shedding. Pests such as cotton bollworm, blind bugs, cotton weevils, red spiders, Bemisia Tabaci and other pests will directly or indirectly cause cotton bud and boll shedding.

Prevention and control measures: we should pay attention to the prevention and control of diseases and insect pests, give priority to prevention, and spray fungicides before rainfall, which can be well prevented. Pest control should be carried out early, and the combination of physical control and chemical control can be used to put an end to the harm of insect pests.

The above is the introduction of cotton bud and boll shedding reasons and control measures, hope to help you, want to know more related knowledge, please pay attention to us.