Pest control of white rhododendron

Common diseases

Prevention and control of sooty mold disease: To control sooty mold disease, we must first eliminate the pests that feed on the sap of white azalea. These insects are the main cause of sooty mold disease.

Prevention and control of brown spot disease: After brown spot disease appears, you can use carbendazim, thiophanate-methyl liquid, mancozeb liquid or methyl thiophanate liquid, spray once a week, and spray 3 to 4 times in a row to treat brown spot disease.

Prevention and control of powdery mildew: In the early stages of powdery mildew, you can use pesticides such as thiophanate-methyl, thiophanate-methyl or benomyl. Spray once a week for two to three times in a row to effectively treat powdery mildew and prevent it from expanding the damage area.

Common pests

Prevention and control of red spider pests: When red spiders do not harm plants, you can rinse them with clean water; if the situation is serious and endangers the health of plants, you can spray avermectin emulsifiable concentrate or cypermethrin emulsifiable concentrate on the surface, which can have a therapeutic effect.

Prevention and control of scale insect pests: Spray with cypermethrin, imidacloprid and pyrethroids. These three medicines should be sprayed in a cycle, once a week, and spray two to three times in a row.

Prevention and control of aphid pests: You can use imidacloprid emulsifiable concentrate, acetamiprid emulsifiable concentrate, bitter tobacco emulsifiable concentrate or phoxim emulsifiable concentrate for spraying.

Prevention and control of large bagworm and yellow thorn moth pests: You can use wettable powder to spray them, which will allow the pests to die slowly on the plants and will not fall into the flower pots or the ground.