With the rise of temperature, tomato bacterial wilt, blight, root knot nematode disease gradually increased. The symptoms of these three diseases are not easily distinguishable on the surface. Here I describe in detail the differences between the three symptoms and the prevention and treatment measures to help the majority of farmers to symptomatic control.
All three diseases can cause the wilting of the victim's tomato plants. The diseased stems were cut and placed in transparent glass filled with clear water. If there is bacterial wilt that overflows mucous, blightless wilt overflows. In the early stage of root knot nematode infestation, the above-ground plants grew poorly, the leaves were smaller than those of normal plants, and the fibrous roots in the underground were reduced. Some nematodes could form "bead-like" worms on the fibrous roots; some nematodes were in the main and lateral roots. Cortical foraging at the junction caused damage to the cortical tissue.
To prevent and treat tomato bacterial wilt, a better method is to use drugs to irrigate roots, such as adding DT plus neemectin or agricultural streptomycin plus rooting agent. In the case of rooting with a drug, the above-mentioned agent can be used for protective spray for tomatoes that are not affected. Tomato plants that have died of the disease cannot be disposed in the greenhouse. They should be buried deep outside the greenhouse and disinfected at the same time. Bacterial wilt can be transmitted through running water, and flooding irrigation can quickly spread and spread bacterial wilt. Therefore, greenhouses with severe symptoms of dead trees are prohibited from flooding. At the same time, proper spraying of some plant growth regulators or foliar fertilizers can effectively promote the recovery of tomato plants, such as Fengshou No.1, Yunda 120, and Duoxin. Fertilization pay attention to less nitrogen fertilizer, more organic fertilizer and phosphorus, potassium fertilizer, in order to enhance the plant's resistance to disease.
Prevention of Fusarium wilt can rotate with vegetables with spicy taste for 3 to 4 years, such as scallion, garlic, etc.; use disease-free seeds, soak it in warm water at 52°C for 30 minutes before sowing, or use 0.4% of 50% carbendazim Seed dressing; soil-free seedlings; strengthen management, the results increase ventilation, reduce soil temperature; early onset with 50% of mycotoxin 1000 times Irrigation roots, 200 ml per plant irrigation, irrigation every 7 to 10 days, Even irrigation 2 or 3 times.
To control root-knot nematode disease, field management must be strengthened, water should be applied with reasonable fertilization, and disease resistance should be enhanced. When the root-knot nematode occurs, the diseased body should be thoroughly treated and burned or buried deeply. For vegetables in the middle growth stage, avermectin plus abundance No.1 and Avi organic fertilizer can be used for prevention and treatment; when sowing or planting, Shi Jianzhibao fertilizer, Avi organic fertilizer, etc., can control the root knot nematode damage; in the greenhouse shed period, the use of lime nitrogen high temperature stuffy shed treatment.
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