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Hydrangea: Hydrangea mucrophylla 'Dooley'
Powdery mildew and Corynespora leaf spot: Erysiphe polygoni; Corynespora cassiicola

Selected organic and synthetic fungicides compared for disease control on hydrangea, 2009.

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First Author: Austin Hagan, Auburn University

Additional Authors: J. W. Olive, J. Stephenson

Section: Ornamentals and Trees


Geographical location: Alabama, United States

Products Tested: Bug oil; Serenade Disease Control RTU; Garden Safe Fungicide; Citrus, Fruit, and Nut Orchard Spray Concentrate; EcoSense Garden Disease Control RTU; Heritage; Immunox

Active chemical(s): Unknown; Bacillus subtilis strain QST 713; Neem oil; Sulfur; Copper octanoate; Azoxystrobin; Myclobutanil

Biological Control:

Biorational Product:

Manufacturer(s): Unknown; AgraQuest, Inc.; Garden Safe ; Bonide; Ortho; Syngenta; Spectracide

Publication date: March 26, 2010

The American Phytopathological Society