Early season grapevine disease management – Facts for Fancy Fruit

Early season grapevine disease management

Grapevines are in early stages of growth across the state, from bud break to 10 inch shoots. Significant shoot growth is expected with the warm weather predicted for this week. This is a very important time to maintain preventative control over major grape diseases including Phomopsis, black rot, powdery mildew and downy mildew. Fungicide application should begin at 1-3 in shoot growth and should be repeated at 7-10 day intervals according to label instructions and environmental conditions through bloom, especially prior to a predicted rain event. See Table 1 for Foundation Fungicide Program for Early Season Control of Grapevine Diseases.

Please note that downy and powdery pathogens are especially prone to fungicide resistance. To avoid this, do not apply back-to-back applications of any one systemic fungicide class.


Table 1. Foundation Fungicide Program for Early Season Control of Grapevine Diseases.


For further information, see the Midwest Fruit Pest Management Guide.

Share This Article
It is the policy of the Purdue University that all persons have equal opportunity and access to its educational programs, services, activities, and facilities without regard to race, religion, color, sex, age, national origin or ancestry, marital status, parental status, sexual orientation, disability or status as a veteran. Purdue is an Affirmative Action Institution. This material may be available in alternative formats. 1-888-EXT-INFO Disclaimer: Reference to products in this publication is not intended to be an endorsement to the exclusion of others which may have similar uses. Any person using products listed in this publication assumes full responsibility for their use in accordance with current directions of the manufacturer.