Prevention of winter greenhouse cucumber cucumber tea
Symptoms of cucumber leaves, which are harmed by tea sorghum, are easily confused with certain physiological diseases or viral diseases of cucumber, resulting in delayed timing of prevention and control. Tea leaves have a strong tenderness. Chengyu and young cubs will focus on the young part of the cucumber sucking hazards, the back of the victim leaves gray brown or brown, and oily luster or oil immersion, stiff and thick leaves, curled edges inward; victim stems, Twigs turned yellow-brown and distorted. In severe cases, the cucumber plant's growth point disappeared and the top was dry. It is not easy to be found in the early stage of the occurrence of the tea plant, and often misses the best timing for prevention and treatment.
The temperature in the cucumber greenhouse in winter is high, which is suitable for the development of Astragalus membranaceus. Although the life cycle is short, the Astragalus membranaceus has strong fertility. For the prevention and treatment of greenhouse cucumber scutellaria scutellaria should be prevented in the early growth period of cucumber. The key part of spraying is the back of the upper part of the plant and its tender leaves, tender stems. Chemical control: can be sprayed with 1.8% avermectin EC 2500-3000 times, 20% fluvalinate EC 1500-2500 times or 20% chloramphenicol 2000 times, 10% Uranus EC 1500 times Liquid and so on. It is usually administered once every 10 days, and it can be controlled 3 times in succession, which can achieve good control effect.
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