Autumn tomatoes result in rotten fruit, the reason is related to the three diseases, and prevention and control should be strengthened. First, soft rot Soft rot is a bacterial disease that mainly affects stems and fruits. When the fruit is onset, the peel is bright, the flesh rots and becomes soft, and after the rupture, it emits offensive odor, easily falls off, and turns into a white, stale fruit after drying. There are three methods for the prevention and control of soft rot: First, avoid pruning on rainy days or when the dew is dry to promote wound healing as soon as possible to prevent the invasion of bacteria; Second, timely control of fruit pests such as cotton bollworm, etc.; Before or at the beginning of the disease, 72% of agricultural streptomycin sulfate soluble powder 4000 times solution or 70% of dexamethasone 1000 times solution is sprayed, sprayed once every 8 to 10 days, and sprayed several times depending on the disease condition. Second, the brown decay disease Brown decay disease is a fungal disease, the main harm to nearly mature fruit, mostly in the fruit from the shoulder to the top of the fruit near the occurrence of light brown spots, concentric ring stains appear later, the fruit surface is smooth and does not soften, When the humidity is high, a mild layer of mildew appears in the diseased part. There are three methods for preventing and treating brownish corruption: firstly, we remove diseased leaves and fruit in time to remove the diseased plant residues on the remnant land; second, we must strengthen the temperature and humidity management of tomatoes cultivated in plastic greenhouses or greenhouses, and timely release air and humidity. The third is in the early onset of the disease with 25% of the diarrhea mold 800 to 1000 times or 75% chlorothalonil 600 to 800 times spray, spray every 7 to 8 days, and even spray 2 to 3 times. Third, the anthracnose caused by anthracnose disease in the fruit stained before dyeing, lurking to the color after the disease, a small transparent spots, and then the lesions gradually expand and turn black, slightly concave, with black dots above, in the wet Under the condition, the diseased department will also secrete red mucus, and finally the fruit will rot and fall off. There are three methods for preventing and controlling anthrax: one is to implement a two-year rotation with non-tomato vegetables in severe disease fields; the second is to remove the source of the disease, remove the diseased fruit in time, prevent the bacteria from re-dyeing, and thoroughly remove ground diseased plant residues after fruit picking. Concentrated burning; the third is in the green fruit period with 80% anthrax Fumei WP 800 times or 50% carbendazim WP 500 times spray, spray every 8 to 10 days 1, even spray 2 times can.
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