What effects do insecticides have when applied to flowers?

Effects of insecticides on flowers:

1. Petroleum emulsion: Petroleum emulsion is prone to causing phytotoxicity to certain peach varieties, so it is best to use it during the leaf-fall season.

2. Rosin mixture: Using rosin mixture in summer causes obvious phytotoxicity to persimmons, and in spring and summer it has adverse effects on citrus.

3. Lime sulfur mixture: It causes phytotoxicity to Rosaceae plants such as peach, plum, Japanese apricot, and pear. If lime sulfur mixture is used on these plants, it is best to spray during the leaf-fall season, and never use it during the growing season or the flowering and fruiting period. Lime sulfur mixture also causes a certain degree of phytotoxicity to kiwifruit, grape, cucumber, and leguminous flowers.

4. Dimethoate and omethoate: They can cause obvious phytotoxicity to ornamental plants of the Rosaceae family such as Japanese apricot, cherry blossom, cherry, elm-leaved spirea, Chaenomeles speciosa, apricot, and pear; dimethoate is also very harmful to Justicia plants such as shrimp plant and coral plant. If dimethoate is sprayed from June to October, it often causes petals to wither and curl, and leaves, inflorescences, and small branches to fall off, losing their ornamental value. In addition, dimethoate also has a certain effect on cucurbits.

5. Dichlorvos: It causes obvious phytotoxicity to ornamental plants such as Japanese apricot, cherry, peach, apricot, and elm-leaved spirea. Under normal circumstances, other types of insecticides can be used instead. Dichlorvos also causes varying degrees of phytotoxicity to rhododendron, willow, kiwifruit, Chinese pagoda tree, walnut, and cucurbits. When using pesticides to control pests on these plants, care should be taken.

6. Trichlorfon: It causes phytotoxicity to cherry blossom, Japanese apricot, and the Golden Delicious variety of apple, among others.

7. Fenitrothion: Using fenitrothion to kill pests in high-temperature seasons causes severe phytotoxicity to pomegranate and also causes relatively great damage to cruciferous flowers.

8. Chlordimeform: When using chlordimeform to control flower pests, avoid using it on hibiscus and dahlia.

9. Thiophanate: When controlling diseases and pests of kiwifruit, avoid using thiophanate.