长期以来，各农药生产厂家和技术推广部门通过药剂试验、示范来推广新技术和新药剂，其主要依据药剂对病虫的防治效果即校正防效来评述药剂的优劣。但我们通过对虫螨克药效试验示范看到这样一种情况，校正防效高达９７％以上的药剂，直观效果并不理想，农民对此不予接受，... For a long time, all pesticide manufacturers and technology promotion departments have tried their best to promote new technologies and new pharmaceuticals by means of pharmaceutical tests, which are mainly based on the prevention and control effects of pesticides on pests and diseases, that is, the correction and prevention measures. However, we have seen through demonstration of the effectiveness of pest mite ginseng to see such a situation, the correct control effect of up to 97% of the agents, the visual effect is not satisfactory, farmers do not accept this, ...