Liriomyza sativae is a kind of tiny flies. Adults are grayish black and have a body length of 1.3-2.3 mm and an egg size of 0.2-0.30.1-0.15 mm. The larvae are headless, with a maximum length of 3 mm. They are colorless at the beginning, they are light orange and orange, and they are elliptical. The size is 1.3 to 2.30.5 to 0.75 mm. Adult ovipositor spatula leaves lay eggs under the epidermis of the leaves, and the larvae feed on the mesophyll under the epidermis of the leaves, forming an extremely serpentine submerged passageway. In severe cases, insect pathways are covered with foliage and the function of the leaves is lost. Finally dry. After larvae mature, defoliation and defoliation occur. From August to September, it is the period of the insects. Its prevention methods are: First, agricultural measures. Pay attention to the idyllic cleanliness. The waste leaves and stems from the damaged vegetable fields should be piled up or buried deeply to eliminate the insect source. In the case of fewer generations, fewer insects, or protected areas, insect leaves (strains) are promptly removed, and the insects and leaves are taken out of fields or greenhouses for centralized destruction. Immediately after the crop was harvested, it was deeply turned and the floorworm was turned into the soil so that it could not be feathered. Second, chemical control. To prevent and control vegetable leafminers, we must use highly effective, low-toxicity, low-residue pharmaceuticals, such as extinction, diflubenzuron, cypermethrin, rifampin, green kungfu, phoxim, quetiaphos, ephedrine, Abadin, extremely harmful, etc., these pesticides have better control effects. Such as with 1.8% Abade EC 2500 ~ 3000 times spray, 10 days after the drug control effect of 85% to 99%, 15 days after the drug control effect of 91% to 100%. The control effect of efford is consistent with that of Ababutyl. With 5% lefron EC 2000 times spray control effect of 88%. The use of pesticides to prevent spotted lilies promotes alternating use of drugs to prevent drug resistance. The appropriate period for the control of the larvae is at the age of young larvae. The protective cultivation of vegetables provides a good place for wintering for vegetable leafminers. The worm can not only winter in the greenhouse, but also can cause harm in the shed and become an important source of insects in open field vegetable fields. Therefore, to do a good job of prevention and control within the greenhouse can effectively prevent the insects from spreading to exposed vegetables after uncovering. In greenhouses, in addition to agricultural measures and chemical control, the method of fumigation can also be adopted during the period of adult emergence of Liriomyza.
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