How to prevent and control Liriomyza? What is the best effect of the specific drug for Liriomyza? I believe that many farmers who have been troubled by the "remediation" of the spotted fly must have a related problem with the paper. The following small series has compiled a leaflet control technique for everyone. First, the host and the situation The host of the spotted fly has a wide range, mainly for cucumber, melon, watermelon, pumpkin and other melon crops, such as bean crops, solanaceous vegetables, potatoes and cruciferae, compositae, etc. Plants and other about 120 kinds of plants. The current host range is also expanding. In particular, crops such as beans, melons, and solanaceous fruits have a pest rate of 100%, leaf damage rate of 70% or more, loss of production of 10-30%, and severely reduced yield by more than 50%. The adult larvae and larvae can be harmful crops, but mainly larvae. Female adults irritate the leaves with their ovipositors and feed on eggs. The larvae hatch and feed under the epidermis of the leaves, forming a white worm, causing the leaves to lose photosynthesis and dry up. The masses called it a "ghost character." Second, life habits The worm has a large number of algebras in one year, and it can occur in the northern region for 10-11 generations, and the duration is short. The completion of the generation is only about 15-30 days. The fields often overlap for generations. Adults prefer to lay eggs in the upper and lower leaves of the plants, and the lower leaves have few eggs. Adults fly weakly, usually only 7-8 meters. The mature larvae bite the epidermis from the top of the leaf and sputum on the front of the leaf or on the surface. Yellow, like sesame seeds. The insect can't overwinter in the open field in the north, but it can breed in the protected land for winter. Therefore, the greenhouse in the north is the only source of insects in the following year. Spring planting is an important part of the wintering and expansion of the larvae. Third, prevention and treatment measures 1. Strengthen quarantine and prevent pests from spreading with vegetable products and vegetable seedlings. 2. Cultivate no insects. Greenhouse seedlings are the main way to expand the insects in the coming year. Therefore, before the seedlings are nursed, the nursery sheds must be disinfected. The 22% dichlorvos agent can be used for fumigation at a dosage of 300-400 grams per mu, and the crops cannot be left in the seedbed. At the same time, the ventilating bed of the nursery bed should be added with an insect net to prevent the transplanting of the insects. 3. Physical control. The worm likes yellow, and the yellow plate traps very well. However, the hanging position of the yellow board must be correct. First, the yellow plate should be hung in the greenhouse from the back wall to the front of the shed at 2/3, and second, the height should be consistent with the height of the seedling, or 10 cm higher. And the yellow board should be taken back indoors for 10-15 days to re-brush the oil. 4. Apply antibiotics and pesticides. The advantage of antibiotic pesticides is that they are safe for crops and are not susceptible to drug resistance. At present, the better pesticide is 1.8% avermectin (also known as Qiqisu, Aifuding, Worm), the control effect can reach more than 85%, and the effective period can reach 20-30 days. 5. Chemical control. The better pesticides are 2000% imidacloprid EC, 2000%, 10% imidacloprid WP 1000 times, 48% chlorpyrifos (Lesburn) emulsifiable concentrate 800-1000 times, and pesticides such as chlorfenapyr can be used, pay attention to alternate medication. 6. Eliminate insects. The insects fall outside the leaves and fall on the mulch. It is best to sweep the worms together after the shed in the morning and take them out of the shed for destruction. The above is all about today's prevention and control of spotted fly, if you are also suffering from this problem, then come to Hui Nong network to learn more! We're professional Laryngology Instruments
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