Chemical Management of Phytophthora capsicin Pumpkin in Illinois_Crimson Publishers

Chemical Management of Phytophthora capsicin Pumpkin in Illinois by Mohammad Babadoost in Modern Concepts & Developmentsin Agronomy: Crimson Publishers-International Journal of Agronomy

Crimson Publishers_Modern Concepts & Developments in Agronomy

Phytophthora blight, caused by Phytophthora capsici, is a destructive disease of cucurbits and peppers in Illinois and worldwide. Fungicide use is a significant component of management strategies of P. capsici in cucurbits and peppers in the United States. Studies were conducted in the laboratory and field to evaluate efficacy of selected fungicides for control of P. capsici in pumpkin in Illinois. In the laboratory, sensitivity of five P. capsici isolates from Illinois was evaluated to the fungicides cyazofamid, dimethomorph, and mandipropamid. Development of colonies and production of sporangia of the isolates were assessed at concentrations of 0.0, 0.1, 0.5, 1.0, 5.0, and 10.0μg/mL of cyazofamid, 0.0, 0.1, 0.5, 1.0, 2.5, and 5.0μg/mL of dimethomorph; and 0.0, 0.05, 0.1, 0.5, 1.0, and 5.0μg/mL of mandipropamid in V8 juice agar in Petri plates. In 2014, 2015, and 2017, effectiveness of the fungicides cyazofamid, dimethomorph, and mandipropamid for control of P. capsici in pumpkin was investigated.

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