Now in the winter and spring period, the cucumber cultivated in winter and spring is easy to be infected with cucumber blight, mostly in the adult stage, mainly affecting leaves, stems and fruits. This disease is relatively harmful, causing death, and the yield will be affected. The main reason for this disease is that the bacteria will overwinter on the sick body or in the soil and on the seeds. When the conditions are appropriate, the bacteria will follow Wind and rain, insects and irrigation water are spread. Cucumber blight damage symptoms: In the onset of the leaf, the lesion spreads from the leaf margin in a "V" shape. The leaf disease is characterized by water-stained lesions at the beginning of the disease, and there is a yellow halo around the lesion, and the lesion spreads to a light brown color. There are many small black dots and the wheel pattern is not obvious, and it is easy to break the perforation. The stem vines begin from the petiole and stem vines. The lesions are elliptical, white, and easily flow out of the white gelatinous substance. Later, the disease becomes yellow and brown in the late stage of the disease, and the small black spots on the top. Severe longitudinal cracking into chaotic, causing vines. The blight is mostly developed from the surface of the stem to the inside, and the vascular bundle does not change brown. After the pathogen infects the flower, it can spread to the top of the melon, causing the water-stained rotten fruit at the top of the fruit to turn black, and the flesh rot, which seriously affects the fruit quality. Later, an amber gel is produced. Cucumber blight occurrence conditions: Cucumber blight occurs at a relatively high temperature and humidity. Generally, the temperature is between 20 and 24 degrees. When the relative humidity of the air is above 85%, the soil moisture content is high. In addition, soil moisture in Dalian, planting too dense, poor ventilation, excessive nitrogen fertilizer, weak growth, lack of light, the incidence is also heavy. Cucumber blight control measures: 1. Select disease-free seeds, soak them in warm water of about 55 degrees for 15 minutes before germination, then rinse them with water before sowing or germination. 2. The cultivated land should be rotated for 3 years with non-melon crops. In the cultivation process, the base fertilizer should be applied, phosphorus, potassium fertilizer and decomposed organic fertilizer should be added, and the topdressing should be carried out in time to increase the growth potential of the plant to increase the disease resistance. . 3. When the diseased plants are found, the diseased leaves, diseased melons and the old leaves at the bottom should be removed in time, and buried or burned, and the fields should be cleaned in time. 4. In the initial stage of the disease, you can use 75% chlorothalonil WP 600 times or 70% thiophanate-methyl WP 1000 times, usually spray 3 times after 4 to 4 days. According to the condition, medication is used. Now is the frequent occurrence of cucumber blight, we must pay attention to preventive measures for cucumber blight in advance. Lower Blood Pressure Plant Extract Lower Blood Pressure Plant Extract,Nattokinase Powder,Nattokinase Extract,Nattokinase Extract For Cardiovascular Fufeng Sinuote Biotechnology Co.,Ltd. , https://www.sntextract.com
