Based on the long range forecast for summer 2026, we will be expecting more rain in the following months. Glomerella leaf spot disease is a significant risk for apple production in apple orchards in Central and south Virginia. Based on literature, the strongest evidence supports …

1. Based on RIMpro model prediction, primary apple scab season has ended on 17 May in Winchester, VA, 14 May 2026 in Sperryville, VA, 12 May 2026 in Roseland, VA, and 8 May in Westfield, NC. The date when the sum of immature and mature …

We are very close to the end of primary apple scab season but we are not there yet. The rains on 6 – 7 May we talked about at an in orchard Extension Meeting in Syria, VA, will likely be the last severe scab infections …

As of 5 May 2026, first blossom blight and shoot blight symptoms were visible us in Madison County, Virginia (Figs 1 – 3). Most likely these infections of flowers have established either in the first week of April or mid April, with the latter being …

May 6 is still far away into the future to trust weather forecast accuracy. However, if any rat-tail bloom still stays open on young trees, on that day a streptomycin application will be needed in Roseland, VA, and Sperryville, VA (infection is predicted as of …

As we were getting closer to 48 h away from rain forecast for 25-28 April, the model predictions for apple scab infection stabilized and are now destined to occur. With these rains cedar apple rust infections will also occur. This seems to be a uniform …

1. APPLE SCAB, CEDAR APPLE RUST, POWDERY MILDEW. With new oncoming rains predicted in weather forecast as of this moment, will lead to apple scab and cedar-apple rust infections on 19-20 April and on 26 – 27 April. The latter rain prediction is too far …

Fire blight infection conditions are reported by NEWA model for 12-14 April in most locations in Virginia and as we previously announced in a blog post last week: 1. No Risk From Scab Infections; 2. Keep An Eye on Cedar-Apple Rust Galls; 3. Potential Risk …

1. APPLE SCAB. For now the apple scab models are not predicting any new infections based on the weather forecast visible as of today. We will see if the forecast for 12-13 April changes or not. As of right now chances for rain are low, …

If pear and apple flowers are opened in your location or will be opening 31 March – 3 April, we have fire blight infections predicted to occur with rains on 2 April in Bristol, 1 April in Winchester, Timberville, Charlottesville and Sperryville, and on 1 …