PHENOLOGICAL STAGES: Full flowering: 50% of caps fallen
Edith Byrne, Association Program Educator I
Lake Erie Regional Grape Program
January 8, 2013
What to be doing (Full flowering: 50% of caps fallen):
Trace Bloom:
- Scout for pests (Watch Scouting Video)
- Continue disease managment protocols
- MONITORING REQUIRED: weather parameters of temperature, precipitation and leaf wetness
- Prepare for bloom --- BLOOM
- Petiole testing - submit ASAP for recommendations on N needs for soil applications
Watch Petiole Gathering Video
- Roots - add nitrogen to the soil by mid-June; preferably 2 weeks prior to bloom (up to 25 lbs actual N) and 2 weeks post bloom (up to 25 lbs actual N)
- INOCULUM AVAILABLE FOR INFECTION
Leaves and fruiting zone - scout and spray for:
Powdery Mildew
Downy Mildew
Phomopsis
Black Rot
Botrytis bunch rot
- Row-middle management; Continue disease management protocols
- Botrytis spray if average temperature is <60F and there is abundant rainfall
- MONITORING REQUIRED: weather parameters of temperature, precipitation and leaf wetness
- INOCULUM AVAILABLE FOR INFECTION
Powdery Mildew
Downy Mildew
Phomopsis
Botrytis bunch rot
Black Rot
- Grape Berry Moth Risk Assessment protocol (Bulletin 138. Risk Assessment of Grape Berry Moth and Guidelines for Management of the Eastern Grape Leafhopper)
- MONITORING REQUIRED: weather parameters of temperature, precipitation and leaf wetness;
grape rootworm - INOCULUM AVAILABLE FOR INFECTION
Powdery Mildew
Downy Mildew
Phomopsis
Botrytis bunch rot
Black Rot
Upcoming Events
LERGP Pesticide Calibration Service
April 1, 2025
April 30 - May 1, 2025May 30, 2025
June 2, 2025
June 30, 2025
Pesticide Calibration service to growers on a first come first serve basis.
2025 NYSDEC How to Get Certified Course
April 2, 2025 : NYSDEC How to Get Certified Training Course and Exam Registration
Portland, NY
NYSDEC training course in preparation to take the pesticide applicator exam
LERGP Coffee Pot Meeting
May 7, 2025
Forestville, NY
Come join us for timely and pertinent vineyard discussion, coffee, donuts and camaraderie.
Announcements
Lake Erie Regional Grape Program - Cornell Cooperative ExtensionYour Trusted Source for Research-Based Knowledge
