Improper use of pesticides not only does not prevent pest control, but it is prone to phytotoxicity, or even if the pests are suppressed, the trees are seriously damaged. After the peach trees were damaged, the growth and development of the light were hindered, and those who fell seriously suffered from falling flowers, falling fruits, fallen leaves, and even dead branches and trees. Therefore, in order to prevent the occurrence of phytotoxicity, the following points must be observed when spraying. 1. Pay attention to the different susceptibility of peach trees to different development stages. If peach trees are sprayed with dichlorvos, dimethoate, trichlorfon, etc. before the hard nuclear phase, serious fruit drops will result. In the later period, no injury occurred. 2. Peach's endurance to different agents is different. If Bordeaux mixture and other copper-containing fungicides are sprayed during the growing season of peach trees, they are susceptible to phytotoxicity, causing perforation and shedding of leaves. 3, the use of high concentration is prone to phytotoxicity, such as the growth period sprayed wave US 0.5 degrees above the lime sulfur, 500 times the 1605 will produce phytotoxicity. 4, climatic conditions also affect the occurrence of phytotoxicity. For example, in the hot noon spray lime sulfur, easy to make the fruit burns. Heavy fog or spraying after spraying is prone to injury. 5. Prevent pesticides from harming humans and animals. Generally highly toxic pesticides such as 1605, etc., are used in the pre-growth stage, and later use is dangerous to humans and animals. In the later period, safer agents such as dichlorvos, trichlorfon, and omethoate should be used. At the same time, the orchard must formulate the date of pre-harvest cessation of use based on different pharmaceutical agents, and the general pharmaceutical agent should be suspended one month before peach fruit harvest; Dichlorvos should be discarded 7-15 days before harvest. In addition, each time after the orchard application is completed, it can be marked on the park boundary to prevent people and livestock from entering the park and accidents occur.