Method for preventing and treating plant diseases and insect pests through biological powder spraying of fruit trees and vegetables under facility

The invention discloses a method for preventing and treating plant diseases and insect pests by means of facility fruit tree and vegetable biological powder spraying, which comprises the following steps of: soaking seeds or fruit tree nursery stocks with a medicament or dipping roots before the seeds or the fruit tree nursery stocks are buried into soil to prevent the seeds or the nursery stocks from being damaged by self-carried or underground pests and germs, and meanwhile, treating soil before planting or mixing the pesticide into the soil. Therefore, pathogens and pests in the soil can be killed. Before sowing or field planting, seeds or fruit nursery stocks and the like are treated with a microbial agent to induce resistance, compound microbial powder is sprayed before diseases and pests occur in the growing season, diseases and pests are treated at the same time, and resistance is induced. According to the method for preventing and treating plant diseases and insect pests through facility fruit tree and