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In addition, adults and nymphs also secrete honeydew, causing coal pollution, and in severe cases, the leaves are black, seriously affecting plant photosynthesis and flower ornamental effects. Bemisia tabaci has a fast development rate, a high reproduction rate, and a strong fulminant attack. Due to the feeding damage on the back of the host plant leaves, this insect has strong concealment. The adults of Bemisia tabaci were white flies. Their body length was less than 1 mm. When they stopped on the plants, the left and right wings were closed to form a ridge.
Control methods: (1) Cultivation of "no insects". During the nursery, separate the seedbed from the production greenhouse, fumigate the seedbed with high-concentration chemicals before the nursery, thoroughly remove the residues and weeds, and prevent the insect seedlings from entering the field. (2) To avoid cucumbers, tomatoes, and squash mixed in greenhouses, promote celery, onion, and garlic to control worms in cultivated agronomy. (3) Bemisia tabaci is not tolerant of low temperatures, but can live in winter greenhouses and greenhouses covered by double membranes. To control the whitefly, it can be rejected outside wintering greenhouses and greenhouses, and the control of tobacco whitefly in wintering sheds should be strengthened. (4) Yellow has a strong trapping effect on adults of Bemisia tabaci, and can be trapped and killed by yellow plates. Method: use 10.2 meters of fiberboard or cardboard, painted orange yellow, and then coated with a layer of sticky oil (you can use 10 oil and add a little butter and mix thoroughly), set 32-34 pieces per acre, placed between the rows, and plant height Consistently, yellow plates need to be recoated 1 to 7 days, taking care to prevent oil droplets from causing burns on the crop. (5) At the initial stage of Bemisia tabaci, it can be used for 1.8% afordin 2000-3000 times liquid, 40% green vegetable treasure 1000 times liquid. 70% of Miramyr water dispersible granules 10000-15000 times, 25% buprofezin 1000 times, or 10% imidacloprid 2000 times, 25% akhtek 7500 times; 2.5% kungfu 2000-3000 times; 3 The acetamiprid 3000 times solution, once every 3-5 days, is continuously controlled 2-3 times. When the density of the insect population is high, 2.5% Uranus 1000-1500 times solution or 5% fipronil 1500 times solution can be used for prevention and treatment. In addition to controlling nymphs, it can kill adult worms. Stop the medication 5-7 days before the harvest. (5) Unified prevention and control: Since the whitefly pollinates a variety of crops and weeds, it has strong reproductive capacity and rapid propagation. Prevention and treatment should be carried out in a relatively wide range to achieve good results.
Occurrence and Control of Bemisia tabaci
Bemisia tabaci is a kind of polyphagous pest, and its host is very extensive. Apart from harming tomatoes, cucumbers, zucchini, eggplant, beans, cruciferous vegetables, and fruit trees, flowers, cotton and other crops, it can also infest a variety of weeds. . Bemisia tabaci adult larvae, nymphs sucking plant sap damage, resulting in plant growth weakness, yield and quality decline, and even the death of the whole plant, and can spread 30 kinds of plants on more than 70 kinds of viral diseases.
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