Report No. 5:OT006
Hydrangea: Hydrangea macrophylla ‘Dooley’
Powdery mildew, Corynespora leaf spot: Erysiphe polygoni; Corynespora cassiicola

Organic and synthetic fungicides compared for foliar disease control on hydrangea, 2010.

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First Author: Austin Hagan, Auburn University

Additional Authors: J. Olive; J. Stephenson

Section: Ornamentals and Trees

Keyword(s): Biorational fungicide

Geographical location: Alabama, United States

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

Active chemical(s): Copper octanoate; Sulfur; Neem Oil; Azoxystrobin; Myclobutanil; Bacillus subtilis strain QST 713; Copper Ammonium complex

Biological Control: 1. Liquid Copper Fungicide; copper octonate; Bonide; 2. Citrus, Fruit, and Nut Orchard Spray Concentrate; sulfur, pyrethrins; Bonide ; 3. Neem Concentrate; neem extract; Green Light; 4. Serenade Disease Control RTU; Bacillus subtilis; AgraQuest; 5. Liquid Copper Fungicidex; Copper Ammonium complex; Southern Ag Insecticides

Biorational Product:

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

Publication date: March 28, 2011

© The American Phytopathological Society