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Control Methods and Medication Tips for Powdery Mildew, Brown Spot and Stem Borer Moth on Dahlia pinnata
Pest and disease control methods for Dahlia pinnata: powdery mildew breaks out heavily from September to October, control it with antifungalmycin 120; brown spot occurs from June to August, spray Bordeaux mixture or chlorothalonil; for viral diseases, prevent aphids and leafhoppers from transmitting the virus; for stem borer moth larvae, spray fenitrothion, so that Dahlia pinnata blooms more brilliantly.