First, the bacterial soft rot
The disease is mostly from the wounds caused by leaf picking, etc., when it is firstly dyed, it is light brown soft rot, which seriously causes the stalk epidermis and pith to become brown rot, lose water and shrink, but the symptoms of upper stem and leaf are not obvious. The vascular bundle is not damaged much; the disease continues to develop, and the upper branches of the diseased stem are wilting and dead. The diseased department has a more obvious odor. The disease occurred more seriously in the front part of the shed and in the drip of the shed film.
Bacteria are difficult to spread in the absence of water droplets and plants without wounds. Therefore, the prevention and control of bacterial diseases should start from reducing the humidity in the greenhouse. Covering the mulch film, using drip irrigation, and reasonable watering, can effectively control the humidity inside the shed; after drafting the raft in the morning, it can be used for short-term ventilation, which can discharge the high-humidity air in the shed, reduce the condensation in the shed; improve the shed structure, The use of high-quality non-drip film, etc., can reduce the dripping of the shed film, and has a significant effect on reducing the disease in the shed.
After the disease occurs, you can use 72% agricultural streptomycin 1500 times solution plus 50% succinic acid copper (DT) 200 times solution or 47% ruinong 200 times solution to smear the disease department, combined with 72% agricultural streptomycin 4000 Adding liquid 47% plus Rui Nong 600 times liquid spray, every 7 to 10 days, for 2 to 3 times.
Second, black blight
The rotten stalk caused by the disease mainly occurs at the base of the stem, and the diseased part is atrophied and sag, and dark brown mold hair is produced, and the inside of the stem becomes brown. There is a crack in the base of the stem, and the disease is serious. At the beginning of the onset of the leaves, dark brown spots are formed, which are irregular. The veins and veins can be affected, and the central color of the lesions is slightly shallow. In severe cases, the leaves die and fall off.
Seed disinfection should be done first to prevent and treat the disease. You can use 10 ml of 2.5% cola, add 150-200 ml of water, mix and mix 5-10 kg. After the disease occurs, you can use 75% chlorothalonil WP 600 times solution, or 50% carbendazim WP 600 times solution plus 50% succinic acid copper (DT) 500 times solution spray control. When spraying, pay attention to spraying evenly, paying special attention to the heavier parts such as the base of the stem must be sprayed.
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