These pesticides must never be used during the flowering growth stage

Due to differences in flower species and variations in growth and development stages, the use of pesticides often causes phytotoxicity in some flowers, ranging from leaf drop in mild cases to plant death in severe cases, resulting in significant losses. Therefore, for ornamental plants that are relatively sensitive to pesticides, correctly selecting pesticides is particularly important. Below is an introduction to the phytotoxicity caused by common pesticides.

Lime sulfur mixture: It causes phytotoxicity to plants such as peach, plum, Japanese apricot, and pear. If used on these plants, spray during the leaf-drop season, and never use it during the growing season or the flowering and fruiting period.

Fenitrothion: Using fenitrothion to kill pests during high-temperature seasons causes severe phytotoxicity to pomegranate and causes certain damage to cruciferous flowers.

Bordeaux mixture: Peach and plum are sensitive during the growing season; when below the specified dilution ratio, pear, apricot, and persimmon are prone to phytotoxicity; when above the specified dilution ratio, grape is prone to phytotoxicity.

Dimethoate and omethoate: Kiwifruit is particularly sensitive and should not be treated with them; they can cause obvious phytotoxicity to Rosaceae ornamental plants such as Japanese apricot flower, cherry blossom, Prunus triloba, and Chaenomeles speciosa, as well as apricot and pear; dimethoate is also very harmful to Justicia brandegeeana and coral flower. If omethoate is sprayed between June and October, it often causes petals to wither and curl, losing their ornamental value.

Dichlorvos: Dichlorvos causes obvious phytotoxicity to ornamental plants such as Japanese apricot flower and cherry blossom, as well as peach, apricot, Twentieth Century pear, and Jingbai pear. Under normal circumstances, other types of insecticides should be used instead. Dichlorvos also causes varying degrees of phytotoxicity to rhododendron, Salix matsudana f. umbraculifera, kiwifruit, Chinese scholar tree, and walnut. When using pesticides to control pests on these plants, great caution should be exercised to avoid unnecessary losses.

Trichlorfon: It causes phytotoxicity to cherry blossom, Japanese apricot flower, and others.