NEWA Strawberry Botrytis and Anthracnose Risk Model – April 18

Emmalea Ernest, Extension Fruit & Vegetable Specialist;

The strawberry section of the Mid-Atlantic Commercial Vegetable Production Recommendations includes fungicide recommendations for botrytis and anthracnose. Timing of fungicide sprays should be informed by weather conditions. NEWA offers a Strawberry Diseases Model for predicting risk of infection by Anthracnose and Botrytis based on DEOS weather stations in Delaware.  This tool includes risk levels based on the 5-day weather forecast. I have compiled the NEWA Strawberry Diseases Risk Levels for seven Delaware locations in the table below. Risk of infection has been low in the last week, except on April 12 in some locations. Forecasted risk is low through April 23 in all locations.

Strawberry Anthracnose and Botrytis Infection Risk from NEWA on April 18, 2024

Updated April 18th Strawberry NEWA System

When risk levels are low (green highlight) fungicides are not needed to control disease. When risk levels are moderate (orange highlight), fungicides should be applied if other factors are present that increase disease risk, such as susceptible varieties or a history of disease in the planting, AND fungicides have not been applied for 7-14 days. When risk levels are high (red highlight) apply a highly effective fungicide as soon as possible if no fungicides have been applied for 7-14 days.

You can get the most recent and relevant strawberry disease risk information by checking the NEWA model for the DEOS station closest to your field.