Wheat spider mite is an infrequent pest that harms wheat from the seedling stage. Adults, nymphs, eggs, wintering on wheat tillers and clods. The ability to withstand cold is extremely strong. When the temperature in late spring reaches 8°C or above, it breeds harm. The victim's wheat leaves showed a small white spot, yellowed afterwards, and the tips of the leaves were dry and the tillers were reduced, like a drought-like fertilizer. As many people mistakenly believe that their hazards are caused by drought and fertilizer shortages, they do not conduct prevention and control before the winter, resulting in increased damage to Hunchun. Therefore, to do a good job in pre-winter prevention and control can greatly reduce the hazards of late spring and prevention and treatment of pressure, and receive the effect of “killing one and eliminating thousands†and doing half the effort. Prevention and control of cornfield spider mites should be based on agricultural control. Eradication can be eliminated by eradicating weeds in the wheat field in time, and can also be eliminated by cultivating, watering, and repression. On the basis of agricultural prevention and control, if the prevention and control targets are still met, timely chemical control shall be carried out. The five-point sampling survey was conducted before chemical defense. Each investigation point had a length of 33 cm and a row of wheat ridges. When there were 5 adult spider mites and nymphs reaching an average of 200 or more, they reached the control index and should be sprayed immediately. Use high-efficiency, low-toxic, low-residue pesticides. Can choose to use 1.5% dimethoate powder or 2% methyl isothiophos powder, spray 1.5 ~ 2.5 kg per acre; can also be used according to the amount of pesticides, 15 ~ 20 kg per acre mixed fine soil, Shunmai ridge applicator. Or use 50% phoxim emulsion 1500 times, or 75% chlorate 2000 times, or 1.8% avermectin 2000 times, or 5% fenpropathrin 3000 times, spray per acre Liquid 50 ~ 70 kg. In the afternoon, the best effect of spraying is from 3 to 4 pm. The pesticide should be sprayed thoroughly and leave no dead ends. After 10 days of spraying, investigations are conducted. If the control indicators are still reached, they can be controlled once more. 100 grams of monopotassium dihydrogen phosphate or urea was added to the liquid per acre amount, and the mixture was sprayed after being mixed well, which not only enhanced the control effect, but also had a significant increase in production. Children Face Mask,Kids Medical Disposable Face Mask,Kids 3 Ply Disposable Face Mask,Kids Nonwoven Disposable Face Mask KUTA TECHNOLOGY INDUSTRY CO.,LIMITED , https://www.kutasureblue.com