Evaluation of Fungicide Blends for Control of White Mold, Early Blight, and Black Dot in Potato (Solanum tuberosum).

Fungal pathogen control is critical for potato production in Idaho. Fungicides are commonly and frequently used to protect potato crops, which can result in pathogen resistance to specific pesticide modes of action (MOA). Fungicides with different MOA were applied to potatoes to determine efficacy of control of white mold, early blight, and black dot diseases and theoretically diminish fungal resistance. Five treatments were used in the study and include 1) untreated control, 2) Luna Tranquility® and Echo Zn®, 3) Endura® and Echo Zn®, 4) Reason®, Echo Zn®, and Luna Tranquility®, and 5) Echo Zn®. Fungicide efficacy, blend phytotoxicity, and disease intensity were measured as well as yield and quality of the tubers.