Report No. 10:V011
Lettuce: Lactuca sativa 'Winterhaven'
Downy mildew: Bremia lactucae

Evaluation of fungicides for management of downy mildew on lettuce, 2015.

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First Author: M.E. Matheron, University of Arizona

Additional Authors: M. Porchas

Section: Citrus, Tropical, Vegetable, and Misc. Crops


Geographical location: Arizona, United States

Products Tested: Zampro; Reason; OxiPhos; OxiDate; AquaSil; Dithane; GWN-10389; GWN-10250; Kinetic; Dyne-Amic; Phostrol; Timorex Gold; Ridomil Gold EC; Revus; Actigard; A20941; Presidio

Active chemical(s): Ametoctradin + Dimethomorph; Fenamidone; hydrogen peroxide + mono- and di-potassium salts of phosphorus acid; Hydrogen dioxide + Peroxyacetic Acid; Mancozeb; Undisclosed; Undisclosed; Non-ionic surfactant; Polyalkyleneoxide modified polydimethylsiloxane, nonionic emulsifiers, methuyl ester of C-16-C-18 fatty acids; Mono- and dibasic sodium, potassium, and ammonium phosphites; Tea tree extract; Mefenoxam; Mandipropamid; Acibenzolar-S-methyl; Fluopicolide

Biological Control: 1. Actigard, acibenzolar-s-methyl, Syngenta; 2. Phostrol, phosphite, Nu-Farm; 3. Oxidate, hydrogen dioxide + peroxyacetic acid, Bio Safe; 4. Oxiphos, hydrogen peroxide + phosphorous acid, Bio Safe; 5. Timorex Gold, tea tree extract, Stockton

Biorational Product:

Manufacturer(s): BASF Corporation; Bayer CropScience; Biosafe Systems; Biosafe Systems; Biosafe Systems; Dow AgroSciences LLC; Gowan Company; Gowan Company; Helena Chemical Company; Helena Chemical Company; Nufarm Americas Inc.; Stockton Group; Syngenta; Syngenta; Syngenta; Syngenta; Valent USA Corporation

Publication date: March 7, 2016

The American Phytopathological Society