Report No. 6:OT003
Hydrangea: Hydrangea macrophylla ‘Dooley’
Powdery mildew, Corynespora leaf spot: Erysiphe polygoni; Corynespora cassiicola

Organic fungicides evaluated for powdery mildew and Corynespora leaf spot control on hydrangea, 2011.

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First Author: Austin Hagan, Auburn University

Additional Authors: J. Olive, J. Stephenson

Section: Ornamentals and Trees


Geographical location: Alabama, United States

Products Tested: Liquid Copper Fungicide; Citrus, Fruit, and Nut Orchard Spray Concentrate; Neem Concentrate; Heritage; Immunox; MilStop; Serenade; Liquid Copper Fungicide

Active chemical(s): Copper octanoate; Sulfur; Neem Oil; Azoxystrobin; Myclobutanil; Potassium bicarbonate; Bacillus subtilis strain QST 713; Copper hydroxide

Biological Control:

Biorational Product:

Manufacturer(s): Bonide; Bonide; Green Light; Syngenta; Spectracide; BioWorks Inc.; AgraQuest, Inc.; Southern Ag

Publication date: March 30, 2012

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