Method for preventing and treating plant diseases and insect pests of cherry fruit trees

The invention provides a method for controlling cherry tree diseases and pests, and belongs to the field of pesticide disease and pest control. The method for preventing and treating the plant diseases and insect pests of the cherry fruit trees comprises the following steps that the surfaces of the cherry fruit trees are coated with a composite whitening agent composed of quick lime, a lime sulfur mixture, copper sulfate, salt and water, and a root irrigation solution composed of multiple traditional Chinese medicine extracting solutions is irrigated in the plant growth process, meanwhile, a composite agent obtained by mixing 25% carbendazim wettable powder diluted by 300-500 times, 0.2% celastrus angulatus emulsifiable concentrate diluted by 1000-2000 times and 5% capsaicin emulsifiable concentrate diluted by 1000-1500 times according to the volume ratio of 1: (2-3): (2-5) is sprayed. The method for preventing and treating diseases and insect pests can effectively reduce the incidence rate of diseases and in