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Fall prevention and cure of three diseases tomatoes
Autumn tomatoes are the result of rotten fruit, the cause of which is closely related to the three diseases, and prevention and control should be strengthened. First, the soft rot caused by soft rot disease tomato soft rot is a bacterial disease, mainly to infect stems and fruits. When the fruit is onset, the peel is bright, the flesh is rotten and soft, and after the rupture, it emits offensive odor, easily falls off, and turns into a white, stale fruit after drying. Control methods: 1. Avoid pruning twigs on rainy days or when the dew is not dry, promote healing of wounds as soon as possible, and prevent the invasion of bacteria. 2. Timely control of pests such as cotton bollworm. 3. Before the onset or early onset, use 72% of streptomycin sulfate soluble powder 4000 times, or 70% of the enemy for 1000 times, spray every 8-10 days, spray several times to see the condition . Second, rotten fruit caused by brown spoilage disease This disease is a fungal disease, the main harm to the near-mature fruit, mostly in the fruit from the shoulder to the top of the fruit near the occurrence of light brown lesions, later into a concentric ring stains, dark brown, surface The smoothness does not soften, and when the humidity is high, the disease minister produces a gray mold layer. Control methods: 1. Remove diseased leaves in time to remove diseased plant residues on the remnant land. 2. To strengthen the temperature and humidity management in plastic greenhouses or tomatoes cultivated in greenhouses, timely release air and remove moisture. 3. When you first see the disease, use 25% of Suicidal Mildew 800-1000 times, or 75% of Chlorothalonil 600-800 times, spray once every 7-8 days, and spray 2-3 times. Third, anthrax caused by rotten fruit This disease is caused by the semi-known bacteria, the bacteria before the fruit coloring infection, after the disease lurking to the color, the emergence of a small transparent spots, gradually expanded and turned black, slightly concave, lesions with concentric ring It has black spots on it, secreting red viscous material under moist conditions, and eventually the fruit rots and falls off. Control methods: 1. Serious disease fields should be implemented for 2 years of rotation with non-tomato vegetables. 2. Remove the source of the disease and promptly remove the disease to prevent re-infection. After the fruit was harvested, the ground sick and debris and the remaining leaves were completely removed and burned. 3. In the green fruit period, use 80% anthraquinone omeprazole WP 800 times, or 50% carbendazim WP 500 times, etc., spray once every 8-10 days, and spray twice to prevent disease development of.