In the control of pathogens and insect pests in flowers and vegetables, chemical control is one of its important means. When chemical agents are used, they must be used with caution to avoid phytotoxicity. Dimethoate is prone to phytotoxicity on plums, blue peaches, cherry blossoms, apricots, figs, olives, hops, and asteraceae. Please use it with caution. The omethoate less than 1500 times has phytotoxicity to hops, asteraceae, peach, apricot, plum, olive, fig, citrus and so on. Trichlorfon is more sensitive to cherry blossoms and apples and is prone to phytotoxicity. Dichlorvos are prone to phytotoxicity on flowers such as plum, peach, cherry, azalea, bayberry, and rose. It is sensitive to willow branches and cannot be used. Salamanders are used at high temperatures and are susceptible to phytotoxicity on cruciferous plants such as violets, incense balls, and kale. Insecticides have harmful effects on flowers such as dahlias and hibiscuses.