Monday, January 28, 2013

Sample Vineyard Spray Schedule

I am always receiving questions regarding grape spray schedules.  Of course, there are tons of "what ifs" and "exceptions" included within the Midwest Small Fruit and Grape Spray Guide https://ag.purdue.edu/hla/Hort/Documents/ID-169-2013.pdf , but many new growers prefer to have some sort of starting point.  See a sample spray schedule below. 
For additional reading, see the Midwest Grape Production handbook, as well http://www.ca.uky.edu/agcollege/plantpathology/ext_files/PPFShtml/mw_grape_12aug05.pdf
Fungicide efficacy table, sorted by FRAC codes, is available at http://www.ca.uky.edu/agcollege/plantpathology/ext_files/PPFShtml/PPFS-FR-S-18(01-2013).pdf

This article contains a commercial vineyard spray schedule.  Homeowners should refer to http://nicolewarduk.blogspot.com/2012/04/homeowner-grape-spray-schedule-low.html

As always, contact your county Extension agent before beginning a spray program.  Also, consider pre-harvest intervals and chemical sensitivities when developing a spray program.


Sample Grape Spray Schedule

  Growth Stage
Target Pathogen

Fungicide
Dormant
A
Sulforix
1” Shoot
P
Mancozeb
3-5” Shoot
P, PM
Mancozeb + Quintec
*Bud Break – Bloom
BR, P, PM, DM
Revus Top  (Abound may be substituted for American or hybrid grapes)
*Mid-Bloom
B, BR, P,    PM, DM
Captan + Endura (Pristine may be substituted)
*Late-Bloom - Shatter
 BR, P, PM, DM
Mancozeb + Quintec
*First Cover (7-10 days after shatter)
BR, PM, DM
Revus Top (Abound may be substituted)
*Second Cover ~  (10-14 days later)
BR, PM, DM
Mancozeb + Forum
Third Cover ~
BR, PM, DM
Mancozeb + Quintec
Fourth Cover ~
BR, PM, DM
Mancozeb + Forum
Fifth Cover ~  (veraison)
B, PM, DM
Captan + Endura (Pristine may be substituted)
Sixth Cover ~
PM, DM
Captan + Quintec
Seventh Cover ~
PM, DM
ProPhyt + Endura
Eighth Cover ~
PM, DM
Revus Top (Abound may be substituted)
Additional Covers ~
PM, DM
ProPhyt + Endura (If additional covers needed)
Last Cover
PM, DM
ProPhyt + Armicarb (Remember PHI)
*Critical period for controlling primary infections.  Stay on schedule.
 
~Space sprays 14 days apart in dry weather but 10 days apart in rainy weather.

**Do not use Flint, Pristine, or Revus Top on American grapes (Concord) or hybrids.




 
 
 
A – anthracnose, B – botrytis rot,  BR – black rot,  P – phomopsis, PM – powdery mildew, DM- downy mildew
 
 
Nicole Ward, Extension plant pathologist
University of Kentucky
Updated Jan 2013
 

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