In recent years, the damage area and damage degree of Bemisia tabaci in the later stage of the cotton field have been increasing year by year, which has a great influence on the growth, yield and quality of cotton. Bemisia tabaci adult larvae or nymphs gathered in the back of the cotton leaf sucking sap damage, when the population density is large, the cotton leaf appears as a piece of yellow spots, the secretion of honey dew can make cotton leaves, cotton bolls black, cotton boll boll when the pollution will make cotton Fiber quality is declining. The amount of worms in B. tabaci in the cotton field increased significantly in the middle and late August, and the amount of worms peaked in the middle and early September. General cotton fields can reduce production by about 10%, and serious damage can reach 20%-30%. Due to the characteristics of strong mobility, rapid reproduction, overlapping generations, large populations, and wide range of hazards, the whitefly should adopt comprehensive prevention and control methods when it comes to prevention and control: 1. Agricultural control. Remove weeds, dead branches and leaves, timely repair cotton pruning, remove the invalid old leaves at the bottom of the cotton, and take the waste leaves and leaves that are covered with pests to be buried deep in the field or burn to eliminate the source of insects. At the same time, the soil was deeply plowed and the adults, nymphs and eggs were buried deep underground. Do not plant vegetables such as zucchini, melon, and squash near the cotton fields to eliminate the intermediate hosts of the whiteflies. 2. Yellow plates trap adult insects. Due to the yellowish nature of Bemisia tabaci, yellow traps can be used during adult development. The method is to cut the fiber board or the relatively smooth cardboard into a rectangle of 3040 cm in size, and paint the board with orange-yellow paint. After the paint is dry, a layer of viscous oil is applied, and the pucker board is nailed with a stick and evenly inserted in the field. The cull board is 5-7 cm higher than the cotton plant. When the chewing board is covered with a whitefly, stick a layer of viscous oil. 3. timely drug control. From the upper, middle, and lower parts of the cotton plant, take a leaf and look at it. When the average number of nymphs of the three leaves is 11-15, it should be immediately controlled. Due to the rapid propagation of Bemisia tabaci and its overlapping generations, there are various forms of insects. In the absence of pesticides that can prevent and control multiple species of insects, different types of pesticides must be used interchangeably, and 20% of acetamiprid can be used 3000 times. Liquid, or 2.5% Buprofezin WP 1000x (This drug has poor control on adults, but it has a good effect on nymphs, and can reduce adult egg production, prevent egg hatching), or 10% imidacloprid wettable powder 800 liquids, or 1.8% of avermectin EC 1000 times, or 2.5% of KDF 2000 times, or 20% chlorinated EC 2000 times spray control. Since B. tabaci accumulates on the back of the leaves, the activity is weak in the evening. It is advisable to use the drug in the evening and ensure that the back of the leaf is full of liquid. Shrimp Frozen,Export Shrimp,Red Shrimp,Frozen Red Shrimp Zhoushan City Shuangying Aquatic Products Co., Ltd.  , https://www.shuangying-aquatic.com