Whiteflies, nymphs like scale insects, flat oval, often have cotton-like substances. Adults are 2 to 3 mm long and are white powdered like small moths. Among them, Bemisia tabaci and Greenhouse whitefly are more difficult to control in current vegetable pests. Many farmers' friends also deeply felt that once they were contaminated, there was a sense of powerlessness.
Tips: Whitefly has a wide range of hosts, the body is waxy, overlapping generations, rapid reproduction, more diffusion and diffusion, and is highly resistant to chemical pesticides. It is very difficult to prevent and control, so comprehensive management must be adopted. Measures. In particular, it is necessary to strengthen the prevention and control of winter protected areas.
Whitefly hazard mode:
Sucking plant juice
2. Destroy chlorophyll and starch, affecting photosynthesis.
3. Slowly grow the host plant.
4. Cause coal pollution.
5. Spread plant virus diseases.
Comprehensive control technology of whitefly:
1. Net seedling: When breeding seedlings without seedlings, separate the seedbed from the production greenhouse, thoroughly disinfect before seedlings, and clean up before planting on the seedlings to ensure that the seedlings transplanted into the greenhouse do not carry larvae.
2. Partition: Before transplanting, clean the greenhouse and set up an insect net at the vent to prevent the outer flour from entering.
3. Biocontrol: Control with Lishen bee, release time, first time after seeing whitefly, about one week after planting; release method, directly hung the bee on the upper part of the plant; release amount, Lijing wasp 1500 - 2000 heads / acre, 7-10 days / time, continuous release 3-5 times, can basically control its damage.
4. Entrapment: Bemisia tabaci has the strongest tropism on the 410 nm yellow plate, and the corresponding insecticidal yellow plate has a 2.5-fold increase in insecticidal effect compared to the ordinary yellow plate. After the seedlings are transplanted, the yellow plate is suspended in the greenhouse to trap the adult, 20 pieces/mu.
5. Chemical control: treatment with a drug having a systemic action, such as Aketai, imidacloprid, and the like.
6. Pay attention to the arrangement of the mouth and reasonable layout: in the greenhouse, greenhouse, cucumber, tomato, eggplant, pepper, kidney beans, etc., do not mix, conditional can be interplanted with celery, leeks, garlic, garlic, etc., to prevent whitefly Spread and spread.
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