DONGGUAN TENYU TECH.INC , https://www.tenyutech.com
The pathogenesis of tomato leaf mold started from the middle and lower leaves. In the early stage, yellow-green and unclear spots were formed on the front of the leaves. Then the leaves grew grayish-white to purple-brown villus-like layer on the back of leaves, and the leaves were serious. A number of lesions were connected to each other and the leaves were curled, and the entire plant was yellow-brown and dry.
To control the disease, we must use a variety of measures and pay attention to the control and prevention of the humidity in the greenhouse. First, reduce the humidity in the greenhouse, use sorghum cultivation, under the film dropper technology, to avoid flood irrigation, to a small number of times, try to water in the sunny morning, avoid watering in rainy days; timely pruning, conducive to ventilation; In the afternoon, the time for closing the air outlet should be appropriately delayed. In the morning, the air should be ventilated and dehumidified in a timely manner to minimize the humidity and foliar condensation time in the greenhouse. Second, timely removal of diseased leaves, attention should be removed when the diseased leaves should be gently removed into a plastic bag to prevent leaf spores sprang spread, the removal of the body of the disease should be immediately taken to the warm outdoor burial, can not be thrown at random . Third, spray prevention can be performed with P. oligandrum wettable powder 3000-5000 times solution and 10% polymycin 5000-6000 times solution in the absence of disease or early onset. Therapeutic agents can be sprayed with 10% of Shigao Water Dispersible Granules 8000-fold, or 50% Kedisydan WP 1000-fold, or 70% thiophanate-methyl WP 2500-fold, or 15%. Imazalil smoke agent fumigation treatment. Medication must pay attention to the interval between the use of drugs safety, can not be listed during the interval.
Anti-greenhouse tomato leaf mold
At present, temperature in the Beijing suburbs has declined rapidly. At night, the temperature is generally lower than 12°C. The greenhouse of tomato greenhouses has entered the period of closing the air inlet at night, and the close of the tuyere will increase the humidity in the greenhouse, causing tomato leaf mold, late blight, and gray mold. Diseases and other diseases occur. In recent days, the Beijing Plant Protection Station investigated Daxing, Tongzhou, Chaoyang and other districts and counties, and found that some of the tomatoes in the greenhouse suffered from severe mildew and the highest rate of diseased plants reached more than 80%. Now is the development of tomato fruit in late autumn in the suburbs of Beijing. The occurrence of leaf mold has a great impact on the yield and quality of tomatoes. Therefore, the vegetable farmers must do a good job of prevention and control.