Which pesticides are prohibited for flowers and fruit trees? What growers need to know

There are countless types of flowers, and their growth stages also vary, which often causes some common flowers to suffer pesticide damage when pesticides are used. In mild cases, leaves drop; in severe cases, the plants die, causing great losses. Therefore, for ornamental plants that are relatively sensitive to pesticides, choosing pesticides correctly is especially important. The following is an introduction to the pesticide damage caused by common pesticides.

Dimethoate and omethoate: kiwifruit is especially sensitive and must not be used; for Rosaceae ornamental plants such as Japanese apricot, cherry blossom, Amur adonis, and Chaenomeles speciosa, as well as apricot and pear, both can cause obvious pesticide damage; dimethoate is also very harmful to shrimp plant and coral plant. If omethoate is sprayed from June to October, it often causes petals to wither and curl, losing their ornamental value.

Dichlorvos: dichlorvos causes obvious pesticide damage to ornamental plants such as Japanese apricot 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 pesticide damage to rhododendron, Salix matsudana, kiwifruit, Sophora japonica, and walnut. When using pesticides to control pests on these plants, great caution should be taken to avoid unnecessary losses.

Trichlorfon: causes pesticide damage to cherry blossom, Japanese apricot, and others.

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

Fenitrothion: using fenitrothion to kill insects in high-temperature seasons causes severe pesticide damage to pomegranate and certain damage to cruciferous flowers.

Bordeaux mixture: peach and plum are sensitive during the growing season; below the multiple dose, pear, apricot, and persimmon are prone to pesticide damage; above the multiple dose, grape is prone to pesticide damage.