The red spider in the wheat field is an infrequent pest that kills wheat at 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. In general, the plots that were not sowed and roughed before sowing were sown early and were heavy before winter. In recent years, due to the high temperature in the fall, it can breed 1 or 2 generations in wheat fields before winter, causing serious damage to wheat seedlings. The victim's wheat leaves showed white spots, yellowing afterwards, dry tips, and reduced tillers. It was like a drought and fertilizer. It was prone to negligence. It was not controlled before winter, and it affected both the safe wintering of the wheat seedlings and the injury of the late spring. Therefore, to do a good job of pre-winter prevention and control, you can receive the effect of “killing one and eliminating thousands”.

Grasping agricultural control against red spiders in wheat fields should be based on agricultural control. Combine farming with prevention and control, without additional prevention and control costs, not killing natural enemies, and not polluting the environment, which is conducive to the production of pollution-free agricultural products. Agricultural control measures are diversified and can continuously control the population of pests and diseases, which can play a cumulative control effect. (1) eliminate insect sources. Wild wheat seedlings, wild oats and their surrounding weeds in wheat fields are riddled with a large amount of red spider mites and eggs. Eradication of these weeds to field crops in time can prevent them from being transferred to wheat seedlings. (2) Ploughing pest control. Because the eggs of red spider are prolific on the soil, the cultivator can protect the drought, increase the temperature of the soil, promote the healthy growth of the wheat seedlings, and can also crush the clods so that the eggs can be killed and buried in the soil and suffocate, exposing the ground surface. Frozen eggs can be greatly reduced by winter freezing. (3) watering pest control. According to the nature of the dead-flying spider mites, the method of watering and shaking with artificial ropes was buried in the soil and suffocated. (4) suppress the insects. Red spiders have a clustered nature. In the late autumn and early winter seasons, they invade wheat seedlings at 9:00 am, and the number of wheat seedlings is highest at 3 to 4 pm. At this time, repression is carried out to ensure good drought control and good control. . Combine with suppression of the seedlings of the wheat seedlings, a large number of red spiders can be pressed into the soil to suffocate.

To do a good job of chemical prevention and control based on the prevention and control of agriculture, if it still meets the prevention and control targets, we must timely carry out chemical prevention and control. The five-point sampling survey for chemical defense was carried out. Each survey point had a length of 33 cm and a row of wheat ridges. When the average of 5 adult spider mites and nymphs reached 200 or more, they reached the prevention and control index and should be sprayed and prevented immediately. The use of 1.5% dimethoate powder or 2% methylisotriphoside powder may be used, spraying 1.5-2.5 kg per mu; or according to the above-mentioned amount of pesticide, 15-20 kg of fine soil per acre may be used for spreading. 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 to 70 kg. The best effect of pesticide application 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.

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