Thrips damage potted leeks, will form a large number of gray spots on the leaves, affecting the appearance of the appearance, in severe cases caused by leaf insufficiency, stunted, rigid; young leaves victims, often in the formation of curved hook shape. When potted leeks are grown in the open air, the thrips are heavy and light in the indoor state. Control methods: 1. Pay attention to potted soil and the surrounding environment, try not to form environmental factors such as high temperature and high humidity that are conducive to the reproduction of thrips, and basin soil should not be too dry to maintain 55-70% of water holding capacity. 2. Between pots and pots, place a certain distance when placing, do not squeeze too much, so that the larvae of the thrips can't quickly spread and spread in close quarters. 3. In the season of the humming horse, 1-2 pieces of blue armyworm board are set up around the basin, no more than 20 centimeters from the tips of the leaves, replaced every other month, and physical measures are taken to control the worm population. 4. After the leeks were placed in pots, spray the plants and basin soil with 20% aquate or 10% nitenpyram standard multiples, with a small amount of liquid overflowing the pelvic floor. 5. When observing the initial occurrence of thrips in the temporal lobe, use the systemic low-toxicity or biological agents such as matrine No. 1, muwante (spirotoxin), veratrine, or spinosad to provide multiple sprays. For prevention and control, replace another agent after 7-10 days and consolidate it again. Laser Interferometer,Ligo Interferometer,Dc Laser Interferometer,Dual Frequency Laser Interferometer Automated Precision Inc. , https://www.apiasean.com