Tree Fruit Pathology Lab at Virginia Tech
(I) Apples. If you are not at pink bud growth stage on apple trees (Northern VA) the rains on 31 March are likely not to cause scab infection due to low relative air humidity and short periods of leaf wetness after the rain. This is …
I invite you to please listen to the Orchard Outlook Podcast (2022): E4 S3. Part 2 Springing into Scab Season: Guest Dr. Srdjan Acimovic: https://anchor.fm/orchard-outlook/episodes/E4-S3–Part-2-Springing-into-Scab-Season-Guest-Dr–Srdjan-Acimovic-e1fta7g
I invite you to please listen to the Orchard Outlook Podcast (2022): E3 S3. Part 1 Springing into Scab Season: Guest Dr. Srdjan Acimovic: https://anchor.fm/orchard-outlook/episodes/E3-S3–Part-1-Springing-into-Scab-Season-Guest-Dr–Srdjan-Acimovic-e1fta1k
A major scab infection is predicted for the rains predicted in forecast 23 to 24 March spanning from Winchester to Tyro to Rustburg, VA and all nearby locations. My recommendation would be to apply anilinopyrimidine (AP) fungicide Vangard (3 oz/A), or Scala (5 fl oz/A), …
Today, 18 March we are at green tip (GT) on early apple cultivars in Winchester VA. GT was reached 7 March in Rustburg VA, on 14 March in Tyro VA. GT was likely even earlier, anytime from 25 to 28 Feb in Ararat VA. GT …
1. One of the main drivers of your stone fruit spray program is brown rot. Even though I hear blossom blight stage of brown rot has never been that dominant of a problem in Virginia, there is always a risk from it if spring is …
1. APPLE SCAB. Apple fruit buds on early cultivars in Winchester are at less than 1% Green Tip (Gala, Arlet) and most other apple cultivars are dormant or with some silver tip (ST). Apple scab and cedar-apple rust were visible in some commercial orchards in …
1. Apple Scab and Marssonina Leaf Blotch were visible in the Shenandoah Valley apple orchards last year. As the fungi that cause these diseases overwinter in the dead leaf litter on the orchard floor, you can increase the future efficacy of your spring fungicides by …
1. Now is the Time to Purchase New or Service Your Existing Weather Station(s) Connected to NEWA Plant Disease Models for 2022 Season! Some RainWise (now KestrelMet) weather stations might not have operated properly in 2021 as they had faulty sensor for either leaf wetness, …
I. APPLE SCAB If apple scab was not controlled timely last year and primary and secondary infections on leaves were visible at any time during the season, you should aim to reduce overwintering scab inoculum residing in leaf litter on the orchard floor. Especially conducive …