At present, in the comprehensive prevention and control of pests, chemical control still occupies a very important position. Grasping the mechanism of action of different fungicides, control spectrum, mode of action and resistance risk and resistance mechanism is the important guarantee for the scientific use of bactericides in disease prevention and control, and delay the drug resistance of pathogens. Chemical agent is a broad concept, in addition to the role of antibacterial bactericidal agents, but also includes some plant immune activator and plant pesticides, different control measures and different types of agents reasonable use of the disease for the prevention and treatment of quality, efficiency and the reduction of chemical agents are of significance.

We generally believe that the chemical structure similar to a class of compounds (such as triazole fungicides, methacrylates fungicide) sterilization spectrum may be the same, but in the actual study found that the same type of fungicide in different products sterilization spectrum there will be a big difference. Therefore, to determine a new compound of the control object must be through rigorous biological activity test to confirm, and can not simply analogize the existing similar products sterilization spectrum. At the same time, the study also found that some fungicides, although the compound structure is different, but its role in the pathogen in the same target, the use of these two agents or after the use of rotation, but will accelerate the emergence of drug resistance, In the production to avoid these errors.

To carry out the new drug resistance risk assessment, combined with drug resistance mechanism and mechanism of action and other research results, the development of field science crop disease management program, the rational use of pharmaceutical rotation and scientific compound, to guide the pesticide enterprise product promotion and Delay the production of resistance and resistance to governance have a very important role.