Posts

Video Recording & Slides of 20 Feb 2024 Webinar on Using RIMpro Apple Scab, Fire Blight and Peach Brown Rot Prediction Models to Help Your Spray Decisions in Climate Change Challenging Conditions

Video Recording & Slides of 20 Feb 2024 Webinar on Using RIMpro Apple Scab, Fire Blight and Peach Brown Rot Prediction Models to Help Your Spray Decisions in Climate Change Challenging Conditions

This is a video recording of Feb 20, 2024 Webinar held by Dr. Srdjan Acimovic on advantages and benefits in using RIMpro apple scab, fire blight and peach brown rot prediction models to help you better time your fungicide spray applications. Using digital tree fruit 

20 Feb Webinar on Using RIMpro Apple Scab, Fire Blight and Peach Brown Rot Prediction Models to Help Your Spray Decisions in Climate Change Challenging Conditions

20 Feb Webinar on Using RIMpro Apple Scab, Fire Blight and Peach Brown Rot Prediction Models to Help Your Spray Decisions in Climate Change Challenging Conditions

Apple scab, pome fruit fire blight and peach brown rot are three two most important apple and peach diseases driving weekly spray decisions every growing season. On Feb 20, 2024 at 9:30 AM Dr. Srdjan Acimovic will keep a 40 min webinar on advantages and 

1. Urea or Lime Can Reduce Overwintering Inoculum of Apple Scab and Marssonina Leaf Blotch in Apple Leaf Litter, 2. Peach Leaf Curl Insurance with Ziram, Copper (Fall) and Chlororthalonil (Spring)

1. Urea or Lime Can Reduce Overwintering Inoculum of Apple Scab and Marssonina Leaf Blotch in Apple Leaf Litter, 2. Peach Leaf Curl Insurance with Ziram, Copper (Fall) and Chlororthalonil (Spring)

I. APPLE SCAB (Venturia inaequalis) If symptoms of apple scab were visible on leaves or fruit during the 2023 growing season, you should plan to reduce overwintering scab inoculum residing in leaf litter on the orchard floor. What you do now for inoculum reduction  can 

First Apple Bitter Rot Symptoms in 2023 Visible in Winchester, VA and an Orchard in Maryland (Both From 5th July 2023)

First Apple Bitter Rot Symptoms in 2023 Visible in Winchester, VA and an Orchard in Maryland (Both From 5th July 2023)

First symptoms of bitter rot disease on immature fruit of apple cultivar ‘Gala’ have been found on 5 July in Winchester at AREC’s experimental Block 30W (Fig. 1, 2). We also found the bitter rot on ‘Idared’ immature fruit in our Block 30 where we 

1. Possible Small Hail with Storms Today – Fire Blight Caution; 2. Bitter Rot Prime Time for Infections Is Now – Hot and Wet Weather

1. Possible Small Hail with Storms Today – Fire Blight Caution; 2. Bitter Rot Prime Time for Infections Is Now – Hot and Wet Weather

1. NEAR WINCHESTER VA: Current weather forecast for locations near Winchester, Berryville, Strasburg, and Syria, state that storms are possible around 12:00 pm with gusty winds and small hail possible. Hail and wind gusts can contribute to trauma blight and severe fire blight spreading to 

Warning 6/16/2023, 9 AM: Possible Hail in Virginia Could Cause Intensive Fire Blight Spreading and Trauma Blight Infections – Prepare to Apply Streptomycin Tomorrow if Hail Damage Occurs

Warning 6/16/2023, 9 AM: Possible Hail in Virginia Could Cause Intensive Fire Blight Spreading and Trauma Blight Infections – Prepare to Apply Streptomycin Tomorrow if Hail Damage Occurs

TO ALL LOCATIONS WITH POME FRUIT IN VIRGINIA: Current storm weather affecting locations from Rustburg over Roseland, Timberville to Winchester has a high chance to bring small to large size hail and wind gusts that can contribute to trauma blight and severe fire blight spreading 

Use NEWA Sooty Blotch & Flyspeck Model to Predict When First Infections Occurred/Will Occur for Your Location

Use NEWA Sooty Blotch & Flyspeck Model to Predict When First Infections Occurred/Will Occur for Your Location

Sooty Blotch and Flyspeck (SBFS) of apple are caused by a large group of fungi which grow superficially on waxy cuticle of apple fruit. Usually, flyspeck caused by Zygophiala jamaicensis shows first and then the sooty blotch appears, which is caused by a complex of 

1. First Apple Scab and Cedar Apple Rust Symptoms on Leaves Visible in Winchester on 16 May; 2. Primary Scab Season is Over on 10 May

1. First Apple Scab and Cedar Apple Rust Symptoms on Leaves Visible in Winchester on 16 May; 2. Primary Scab Season is Over on 10 May

All the major apple fungal diseases in the Shenandoah Valley are visible in 2023 growing season: apple scab (Figs 1, 2), powdery mildew (previous post from 8 May), and rust (Fig. 4). On 16 May, I found first fresh scab infections on ‘Gala’ leaves (Fig. 

1. If Young or Cider Trees in Bloom, 8 May Fire Blight Infection Needed Streptomycin; 2. Primary Scab Season Over in South VA but Juniper Rusts Continue to Infect Apples; 3. Powdery Mildew is a Risk

1. If Young or Cider Trees in Bloom, 8 May Fire Blight Infection Needed Streptomycin; 2. Primary Scab Season Over in South VA but Juniper Rusts Continue to Infect Apples; 3. Powdery Mildew is a Risk

1. If any young trees planted late are in bloom, or any cider cultivars are maybe in bloom in Northern VA, fire blight infection reported by NEWA EIP model on 8 May should have been controlled by streptomycin application in mix with Regulaid or Li700 

1. First Fire Blight Symptoms on Flowers Visible in Winchester; 2. Cedar Apple Rust Galls Fully Developed and Basidiospores Infecting Unprotected Apple Trees

1. First Fire Blight Symptoms on Flowers Visible in Winchester; 2. Cedar Apple Rust Galls Fully Developed and Basidiospores Infecting Unprotected Apple Trees

1. On 29th April, first blossom blight symptoms were found by Bill Mackintosh (Figs 1, 2). Most likely these infections of flowers have established either on the 5th or 6th April or 16 or 17 April, with the latter being the more likely scenario as