Cucumber plants appear wilting phenomenon, even dead trees, mainly caused by excessive fertilizer and water, diseases and insect pests.
One is that excessive fertilizer and water cause root injury. Most vegetable farmers believe that after the temperature rises, the cucumber grows fast and needs to increase the supply of fertilizer and water to ensure the growth of plants and melons. In fact, the temperature of the groundwater after the temperature rise is still very low, and the pouring of water will inevitably reduce the temperature of the ground, affect the permeability of the soil and injure the root system. Similarly, excessive use of one-time fertilizer can also cause burning. After the root injury, the disease resistance of the plant was reduced, creating an opportunity for root diseases to occur and aggravating dead tree phenomenon.
The second is the rotten vine caused by spoilage, Sclerotinia and other diseases. According to the type of disease, reasonable drug control. The control of bacterial wilt can be sprayed with difenoconazole, thiachlor, or prochloraz. Sclerotinia can be used to spray iprodione, procymidone, azoxystrobin and other drugs.
The third is root knot nematode damage. After the weather warmed up, the activity of nematode intensified, which seriously damaged the root system, weakened the ability of the roots to absorb water and absorbed fertilizer, and could not meet the demand for fertilizer and water in the aboveground parts, resulting in yellowing and wilting of the leaves, and even inducing dead trees in root diseases. Cucumber growth stage control root knot nematodes can be used 1.8% abamectin and chitin Irrigation root. It is best to use lime-nitrogen and other high-temperature stuffy sheds during the summer break period, or to apply 10% more thiazole phospholipids during the colonization to protect the environment around the roots and protect the root system from root-knot nematodes.
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