The topping of cucumber flowers affects the yield. What is the cause of cucumber flower topping?

Let me talk about the cause of cucumber topping and how to prevent it!

1. The first is the harm of pests and diseases (red and white spiders, aphids). In recent years, red spiders and white spiders are more serious, which seriously endanger the growth of leaves and easily endanger the growing points. So are aphids. These pests are all piercing-sucking pests. They can survive and reproduce by sucking the juice of plants, and they can also spread viruses. It is difficult to control when it happens, mainly because bugs are smaller and reproduce faster. At present, the effective insecticides against red and white spiders and aphids are: 50% bifenazate-ethyl azole and 70% thiamethoxam. You can choose prevention and control according to the situation in your own field.

2. Drought caused insufficient supply of water and fertilizer to the roots, resulting in topping and flowering. Cucumber prefers water and fertilizer during planting. If the root system is difficult to absorb water and nutrition in the case of drought again, it will directly affect the growth of cucumber and form the phenomenon of flowering topping. In view of this situation, it is necessary to water and fertilize in time, apply a small amount of water and fertilizer for the first time, and slowly restore the water absorption capacity of cucumber roots. Topdressing with water and fertilizer within seven to ten days in this way will alleviate the symptoms of flower topping to some extent.

3. In addition, the root system absorbs water and nutrition obstacles due to retting and burning, resulting in the phenomenon of flower topping. According to the situation of retting roots, it is necessary to dredge the soil around the roots and run entropy. After 3 ~ 5 days, you can use some rooting agents, such as Guoguang Genbao, to stimulate the growth of new roots. In view of the phenomenon of root burning, a small amount of water should be poured in time to reduce the obstacles caused by root burning.

4. Root-knot nematodes form nodules between capillary roots and main roots, which affect the normal absorption of water and nutrition by roots and form nutritional obstacles, which are manifested as flowering topping. In view of this situation, the measures that need to be taken are: 10% avermectin 100g for dripping or washing, or 10% thiazole phosphorus 500ml for washing. After the root-knot nematode is controlled, the root nodules on the root system will not disappear, which may alleviate the phenomenon of flower topping to some extent. ?

The above is my analysis of the phenomenon of cucumber topping.