Prevention: 1. Greenhouse control measures should be adopted for control of tomato Bemisia tabaci in greenhouses. First, no insect seedlings were transplanted; secondly, insect nets were installed in the ventilation openings and doorways of the greenhouses, and yellow plates were hung in the interior of the planting shed for trapping and killing. 30 pieces were placed per acre, and the lower edge of the yellow plate was 10-15 from the top of the tomato plants. Centimeters; third is chemical control, can use 0.3% matrine AS1000-1500 times, 10% imidacloprid wettable powder 1000 times, 35% thiamethoxam pyridoxone 3000 times spray control 1-2 times in the early morning smoke The whitefly is best when it is lurking on the back of leaves. 2. Cucumber downy mildew and green onion downy mildew can be used 68% Jin Lei, 64% antivirus, 57% acrylamide, 72% frost tyrants, 72% frost urea manganese zinc, 58% metalaxyl, 70 Routine control of chlorothalonil (dacconazole) and other agents, pay attention to the use of agents for rotation. Onion purple spot can be controlled with 70% Prosin Zinc (Aetnax) 600 times or 43% tebuconazole (Holik) 3000-4000 times. 3. Control of open field vegetables, tobacco whitefly, should be controlled by chemical agents. Rotational use of matrine, imidacloprid, thiamethoxam, acetamiprid and other agents spray control. Do not arbitrarily increase the concentration of pesticides to avoid increased resistance to B. tabaci. 4. Control of open field vegetables Spodoptera exigua, Plutella xylostella, Pieris rapae available 0.3% matrine 1000-1500 times, 35% chlorantraniliprole 17500-20,000 dilution, 30% abamectin 2000- 3000 times liquid spray, pay attention to rotation drugs, spray thoroughly spray. Yancheng Rongtai Labware Co.,Ltd , https://www.shtestlab.com
Pay attention to the control of vegetable pests and diseases
Recently, the technical personnel of the planting and protecting station of the Yongnian County Agriculture and Animal Husbandry Bureau conducted an in-depth survey of vegetable growing areas and discovered that the current occurrence of vegetable pests and diseases was severe. Tomatoes (early flowering period) in greenhouses mainly occurred Bemisia tabaci and yellow leaf curl virus disease; Cucumber downy mildew, Liriomyza sativae, Bemisia tabaci occurred in the open; Heavier occurrence of cauliflower blooms in open field, Bemisia tabaci, Beet night Moths, Plutella xylostella and Pieris rapae were heavier; Onion downy mildew and Liriomyza larvae were also more serious. In view of the current heavy incidence of vegetable pests and diseases, we reminded farmers to prevent and control in a timely manner and minimize losses.