Joseph from Minneapolis, Mn writes
Orange rust destroyed my adult hollyhocks. I sprayed Fungonil on some hollyhock seedlings to protect them. The next day, it rained heavily. it has been humid and sometimes drizzly since then. should I spray again? If so, how often? Would Fungonil kill the rust *spores* if I sprayed the ground where the hollyhocks grow? Thank you.
Fung-onil Multi Purpose Fungicide Concentrate states on the product label: Repeat applications at 7 to 14 day intervals until conditions are no longer favorable for disease. During periods when conditions favor severe disease incidence, generally cloudy or wet weather, apply this product at 7 day intervals. DO NOT apply more than a total of 37 fluid ounces of this product (0.84 lbs chlorothalonil active ingredient) per 1,000 sq. ft. per growing season on field-grown ornamentals. Fung-onil is only effective when sprayed to the plant itself, spraying the soil will not be beneficial.
Answer last updated on: 08/19/2016
