Location: Forage Seed and Cereal Research UnitTitle: Evaluation of fungicides for hop downy mildew and powdery mildew, Prosser, Washington, 2018
|MASSIE, STEPHEN - Washington Hop Commission|
|CLAASSEN, BRIANA - Oregon State University|
|Gent, David - Dave|
Submitted to: Plant Disease Management Reports
Publication Type: Other
Publication Acceptance Date: 1/31/2019
Publication Date: 3/1/2019
Citation: Massie, S.T., Claassen, B.J., Gent, D.H. 2019. Evaluation of fungicides for hop downy mildew and powdery mildew, Prosser, Washington, 2018. Plant Disease Management Reports. 13:V026.
Interpretive Summary: Downy mildew and powdery mildew are the two primary diseases affecting the U.S. hop industry. This research was conducted to quantify disease suppression using newly registered products and/or those with reduced risk based on toxicological property. Of particular note was the identification of a compound used as a miticide that appears to suppress both diseases.
Technical Abstract: This research was conducted to quantify the degree of control of the diseases downy mildew and powdery mildew with newly registered and experimental fungicides. Varying levels of control were found. Of particular note was the finding of disease suppression with a compound used primarily as a miticide in several crops. These findings will support development of best management practice recommendations for these disease.