What is the most effective way to control scale insects on flowers?

Scale insects often gather on branches, leaves, flowers and fruit. Adults and nymphs pierce into the flower tissues with their specialized mouthparts to suck sap, leaving irregular yellow spots on the leaves. In severe cases, the leaves dry up and the fruit shrivels, and the infestation can also induce sooty mold.

Control measures: spray during the hatching period, when the nymphs have not yet settled. Spray omethoate or dichlorvos once a week for 3-4 consecutive times, and results will be seen. Spraying machine oil emulsion in spring has a certain control effect. In addition, drenching the roots with dichlorvos diluted 500 times, or applying 3-10 grams of 10% carbofuran per pot, also gives good results.

A small number of scale insects can be scraped off by hand with a bamboo strip. Branches with a high insect density should be thinned out, and overly dense branches should also be removed to improve ventilation and light penetration.