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 …

With the extreme heat wave we have experienced in the recent several weeks, pears have been in active bloom for some time and were under risk from infection by fire blight on 22 March. The NEWA’s Infection Potential EIP value reached over 100 on March …

(I) Apple Diseases Flower buds on apple are putting the green tissues out, with more surface unfolding each day. Due to abnormally warm weather we experienced last week into this week, some locations in the southern Virginia have most fresh fruit apple cultivars transitioning to …

In terms of delayed dormant copper, so far we have always operated under the assumption that the delayed dormant copper application is effective as one mancozeb application for apple scab. Before thinking about starting a scab spray program, one must determine if they have cultivars …

A standard recommendation for delayed dormant copper is applying it on apples between Silver Tip and until but not beyond quarter inch green tip (QIG). QIG is determined by looking at the floral apple buds which are wider in appearance and situated on spurs. Leaf …