Which pesticides should not be sprayed on flowering plants and fruit trees?

Because flower species differ and their growth and development stages vary, some common flowers often suffer pesticide damage when pesticides are used; in mild cases leaves drop, and in severe cases the plants die, causing great losses. Therefore, for ornamental plants that are relatively sensitive to pesticides, choosing the right pesticide is especially important. The following is an introduction to the damage caused by common pesticides.

Dimethoate, omethoate: kiwifruit is especially sensitive and must not be used; for Rosaceae ornamental plants such as Japanese apricot, cherry blossom, Amur cherry, 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, Chinese willow, kiwifruit, Chinese scholar tree, and walnut. When using pesticides to control pests on these plants, great care 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 peach, plum, Japanese apricot, pear, and other plants. If 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 the high-temperature season causes severe pesticide damage to pomegranate and certain harm to cruciferous flowers.

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