To prevent tomato "rot fruit"
Tomatoes in the fruiting period, the reason for which is related to the three diseases, should be strengthened.
1. Soft Rot Disease: It 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 prevention and control:
One is to avoid pruning in rainy days or when the dew is still 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.; three is 72% agricultural sulfuric acid before the onset or early onset Streptomycin soluble powder 4000 times or 70% of the enemy 1000 times sprayed dextrose, sprayed every 8-10 days 1, spray several times depending on the condition may be.
2.Brown spoilage disease: It is a fungal disease. It mainly damages fruits that are close to mature. Most of them produce light brown spots on the shoulders of fruit and near the top of the fruit. Concentric ring lentigules appear later. The fruit surface is smooth and does not soften, and the humidity is high. At the time of disease, a layer of gray and white mold appeared. There are three methods for prevention and control:
One is to remove diseased leaves and fruit in time to remove the diseased plant residues on the remnant land; the other is to increase the temperature and humidity management of the tomatoes cultivated in plastic greenhouses or greenhouses, and timely release air to release moisture; the third is to use 25% of Rui in the early stage of disease. Poisonous mold 800 to 1000 times or 75% chlorothalonil 600 to 800 times spray, spray every 7-8 days, even spray 2-3 times.
3, anthrax: anthrax bacteria in the fruit stained before the color, the incidence of latent to the color after the disease, the emergence of a small transparent spots, and then the lesion gradually expanded and turned black, slightly depressed, with black dots above, in wet conditions The department also secretes red mucus, and finally the fruit rots and falls off.
There are three methods for prevention and control:
The first is to implement a two-year rotation with non-tomato vegetables in the severe disease field; the second is to remove the source of the disease, remove the diseased fruit in time, prevent the bacteria from being re-infected, and completely remove ground diseased plant residues after fruit collection, and burn them in a concentrated manner; With 80% anthrax Fumei WP 800 times or 50% carbendazim WP 500 times spray, spray every 8-10 days, and even spray 2 times.
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