What are the methods for controlling pests and diseases in chrysanthemums?

Chrysanthemums are susceptible to damage from aphids, red spider mites, whiteflies, longhorn beetles, leaf-rolling moths, stinging moths, inchworms, white grubs and other pests, as well as brown spot disease, black spot disease, powdery mildew, root rot, leaf blight, rust disease and other diseases; plant essential oils should be used for timely control.

① After chrysanthemums contract leaf spot disease, be sure to promptly remove and destroy the diseased leaves, and at the same time spray 65% zineb wettable powder at 500 times dilution or 75% chlorothalonil wettable powder at 500 times dilution to treat it.

② When rust disease occurs on the plants, spraying 65% zineb wettable powder at 500 times dilution is sufficient.

③ When aphid damage occurs, you can spray 25% ammonium thionophosphate emulsifiable concentrate at 1000 times dilution or 40% omethoate emulsifiable concentrate at 1500-3000 times dilution to kill them.

④ When red spider mite damage occurs, you can spray 40% omethoate emulsifiable concentrate at 1000 times dilution or 80% dichlorvos at 1000 times dilution to kill them.