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Grape
Pests

Alternate photo of some images on mouseover
Black Rot on grape leaf: top and bottom sidesDowney Mildew on grape leaf: top and bottom sidesFly Gall on grape

Leafroll Virus on single leaf and in vineyard

Featured Pest of the Quarter: Leafroll Virus
Description: Symptoms most obvious in fall. Infected vines smaller than healthy vines. Leaves turn yellow or reddish purple while veins remain green. Leaves roll downward. This disease does not kill the vine and not all infected vines show symptoms. Infected vines may be weakened such that they are predisposed to other insect, disease, and environmental problems. Primarily spread through nursery stock and grape mealybug; although, spread by mealybug is very slow.

Grapevine Disease Testing Services (.pdf)
Downey Mildew on Grapes 2009 (.pdf)
Grape Bunch Rot 2009 (.pdf)
Preparation for the 2009 Grape Growing Season (.pdf)
Midwest Commercial Small Fruit and Grape Spray Guide 2009(.pdf)
Commercial Grape Insect and Disease Control-2007 (.pdf)
Pierce's Disease Advisory (.pdf)
Black Rot Advisory (.pdf)
Apple Twig Borer Advisory (.pdf)
Pre-Harvest and Late-Season Disease Management for Grapes (.pdf)
Grape Rootworm Season-Be on the lookout (.pdf)
Results of Fungicide Evaluations for Control of Black Rot of Grape in Oklahoma, 2008 (.pdf)

Month by Month problems to watch for:

<
JANUARY
 Insect:
Disease:
Animal:
Other		  
JULY
 Insect: Mites, Grape berry moth, Rose chafer, Leafhopper, Redbanded leafroller, Grape mealybug, Grape leafhopper, Japanese beetle, Grape root borer, Green June beetle
Disease: Black rot, Powdery mildew, Downy mildew, Botrytis bunch rot
Animal: Birds, Deer, Turkey, Racoons
Other:
FEBRUARY

Insect:
Disease:
Animal:
Other:

  
AUGUST
 Insect: Grape berry moth, Grape leafhopper, Japanese beetle, Grape root borer, Rose chafer, Green June beetle
Disease: Black rot, Botrytis bunch rot, Leafroll virus
Animal:Birds, Deer, Turkey, Racoons
Other:
MARCH

Insect: European red mite, scale, apple twig borer
Disease:
Animal:
Other:

  
SEPTEMBER
 Insect:
Disease: Leafroll virus, Powdery mildew
Animal:
Other:
APRIL

Insect: Rose chafer, European red mite, Grape berry moth, Grape phylloxera, flea beetle, climbing cutworm
Disease: Black rot, Powdery mildew, Downy mildew,
Animal:
Other:

  
OCTOBER
 Insect:
Disease: Leafroll virus
Animal:
Other:
MAY
 Insect: Grape berry moth, Leafhopper, Rose chafer, Grape mealybug, Grape rootworm, Redbanded leafroller, Mites
Disease: Anthracnose (wet years), Black rot, Downy mildew, Powdery mildew, Crown gall
Animal:
Other:		  
NOVEMBER
 Insect:
Disease:
Animal:
Other:
JUNE
 Insect: Mites, Grape berry moth, Rose chafer, Leafhopper, Redbanded leafroller, Grape mealybug
Disease: Black rot, Powdery mildew, Downy mildew
Animal: Birds, Deer, Turkey, Racoons
Other: Bunch stem necrosis		  
DECEMBER
 Insect:
Disease:
Animal:
Other:
   
 

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