Recently, many vegetable farmers have called for telephone consultation. How can the control of tomato spotted wilt virus be the best? For Tomato spotted wilt virus disease, the provincial agricultural science and technology 110 vegetable experts went to key regions of the whole province to carry out investigation and guidance, and put forward preventive warning advice.
After the disease is infected at the seedling stage, the young leaves are copper-colored and curled, and there are many dark spots on the leaves. The purple veins on the back veins of the leaves lose their green color, and the stems have faded stripe spots. The diseased plants grow slowly or dwarf, defoliate, wilt, and atrophy. Decreased, severe plant wilting directly, this symptom is easily confused with stripe virus. The tomato was infected during the result period, and the surface of the fruit appeared green and raised ring spots, the ring veins were not obvious, or the brown necrotic spots that were knob-like protrusions could cause the disease fruit to fall off. If the fruit is infected when the fruit matures, the lesion ring pattern is obvious, and the green spots are most obvious in the colored period. In severe cases, the fruit is stiff and the spots become brown and necrotic. The umbilical symptoms are easily confused with the umbilical rot disease. .
For Tomato spotted wilt virus disease, it is difficult to get effective control if it cannot be prescribed. Therefore, many vegetable farmers have a headache for Tomato spotted wilt virus disease. Tomato spotted wilt virus disease is transmitted naturally through plant hosts, mainly through sucking or pests, such as aphids, migratory locusts, and thrips. At the same time, high temperatures and droughts also occur. Conducive to disease. Poor management in the field, and friction between sick and healthy plants in agricultural operations can also cause morbidity. At present, there are no effective prevention and control measures against the virus. Prevention and control can only be achieved through measures such as prevention and control of sucking pests and strengthening of agricultural practices. In the greenhouse, 15% isoprocarb is used for fumigation to kill insects, and 250 grams per acre is used to eradicate weeds. In the shed, yellow armyworm board can be used for prevention and control to cultivate strong seedlings and remove diseased plants; after the tomato colonization, it is found that Suction pests are promptly treated with 10% imidacloprid wettable powder 1500 times, and can also be sprayed with 25% Aktai water dispersible granules 1500 times. Spraying is best sprayed to the stem base to kill root larvae and pupa. With 20% morpholine èƒ copper 300 times liquid control, or 300 times with lentinan control, tomato mosaic virus disease, spotted wilt virus disease have a certain effect.
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