Causes of cucumber growth point necrosis
Causes of cucumber growth point necrosis are cucumber scab, cucumber calcium deficiency, cucumber disease. 1. Scab or scab is one of the devastating diseases in the cucumber production process. It mainly harms the growing points, tendrils, leaves, vines, melons and other parts of cucumbers, especially the most serious damage growth points. Two to three days after infection, the growing point can be rotted, forming a "padding". Lesions stained with brownish brown rot, lesions on the leaves near the circular perforation. The vines and petioles were damaged, and the middle of the disease department was sunk to form sores. After the melon strips were damaged, the diseased part became sore and it was easy to form malformed melons. The appeal is characterized by the essential difference between cucumber scab and calcium deficiency. Scabs are generally easy to emerge during the seedling stage and fruiting stage. 2. Calcium deficiency in cucumber is a physiological disease in which the cucumber vines prone to occur, resulting in poor growth point growth. The first cucumber of cucumber usually has symptoms of calcium deficiency when it is about 20 centimeters. The upper leaf shape is slightly smaller and curls to the inside or outside. The leaves near the growth point are cup-shaped and the leaf margin curls to death. When the growth point is severe, the adhesion is necrotic. When the humidity is high, it is easy to be infected by pathogens and a layer of gray and black mold appears on the surface (Note: Atrophy near the growth point, and loss of boron in the melon strips). Cucumbers are prone to lack of calcium during the vine extension period; new greenhouses have poor soil fertility and are prone to calcium deficiency when they encounter long-term low temperatures, poor light, and damaged roots. 3. Epidemic diseases mainly damage leaves, stems and melon strips. After the young leaves of cucumber were injured, the edges appeared dark green lesions. Afterwards, they showed rot-like drooping. The diseased part gradually became dense with white molds. Even when the humidity in the cloudy sky room was high, it could easily cause damage to the entire growing point, resulting in adhesion and necrosis. The disease is easily confused with spleen disease and attention should be paid to the difference. Prevention: Prevent calcium deficiency, you can apply 2.5 kilograms of water-soluble fertilizer per acre, or in the early melon period (before symptoms of calcium deficiency), calcium aminophyll supplementation calcium. At the same time, Fuxing can be mixed with calcium fertilizers to spray and prevent black spot disease. Cucumber blight can be selected and controlled by the use of agents such as dimethomorph manganese zinc and Xiangnong No.1. Hybrid Stepper Motors,Brushless DC Motors,Linear Motor,Gear Motor,Step-Servo Motors,Brushless Motors Changzhou Satidi Import and Export Co., Ltd. , https://www.czguanjiechuck.com