Causes of abnormal growth of cucumber faucet and its control measures

Cucumber top growth point is called the dragon head, cucumber plant growth and health depends on the growth of the dragon head, under normal circumstances, the top of the dragon head leaflets are green, yellow green and yellow three kinds, uniform color and no pests. However, in the cultivation process, the dragon head often appears rotten head, yellow head and other phenomena, how is this going on? Let's learn about it together with Xiaobian.

1. Phytotoxicity

Cucumber has serious diseases in the process of growth. In order to prevent diseases, many farmers often increase the concentration of pesticides or randomly mix pesticides to prevent diseases, which is easy to cause phytotoxicity. After the occurrence of phytotoxicity, it will be manifested as withered or yellowed leaf margins, deformed leaves and fruits, spots or spots. Therefore, in the prevention and control of diseases and insect pests, we must strictly control the concentration and dosage, do not over-use drugs, try to avoid mixing drugs, especially with copper preparations, so as to avoid phytotoxicity, resulting in abnormal faucet.

2. Disease

Disease is also one of the reasons for cucumber rotten head and yellow head, such as black spot disease, gray mold, etc., and brown spot disease in serious condition will also cause a large number of yellow spots on the top leaves of cucumber, forming yellow head. The winter low temperature season easy to occur when the vine disease is also caused by cucumber rotten head rot, other cucumber bacterial edge blight, black spot, gray mold, gray blight and so on can cause cucumber rotten head. Therefore, when the disease causes abnormal growth of cucumber head, we should first distinguish which disease it is caused by, and then prescribe the right medicine to prevent and control it.

3. Deficiency

Deficiency disease is also one of the reasons for abnormal growth of cucumber head. When the plant is deficient in zinc and iron, it is easy to yellow the head, first the top leaf turns yellow, the veins are yellow and white, then the yellow leaves expand from top to bottom, and gradually the leaf edge becomes necrotic and withered; and when calcium is deficient, it is easy to cause rotten head, first the top leaves begin to rot from the leaf edge or between the leaves, and finally the cucumber growth point disappears. Therefore, balance must be achieved when applying fertilizer, not only pay attention to the balance between organic fertilizer and chemical fertilizer, but also pay attention to the balance of trace elements and medium elements, and supplement calcium fertilizer in time to avoid causing deficiency and causing rot.

4. Hormone poisoning

In dipping melon, because the concentration of the drug is excessive, or the liquid splashed on the cucumber leaves and stems will lead to cucumber hormone poisoning, which will also lead to abnormal growth of the dragon head. After hormone poisoning occurs, the leaves begin to yellow, the top piece is hard and crisp, the growth is slow or even stops growing, so the concentration of the agent must be controlled when dipping the melon, and the operation should be careful.

The above is an introduction to the causes and control measures of abnormal growth of cucumber heads. I hope it can help you. If you want to know more about related knowledge, please pay attention to us.