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Information for scouting vineyards and diagnosing problems
The following information on the biology of common diseases, physiological and chemical disorders, and insect pest and beneficial species can assist with vineyard scouting and problem diagnosis. A handy pocket-sized guide with a summary of this information can be purchased from MSU Extension. Or for assistance with identification, contact one of the diagnosticians at MSU Diagnostic Services by e-mail or phone.
Alphabetical listing of common diseases
Angular leaf scorch
Anthracnose
Armillaria root rot
Bitter rot
Black rot
Botrytis bunch rot
Crown gall
Downy mildew
Eutypa dieback
Fan leaf degeneration
Flavescence dorée
Flyspeck
Grapevine decline or Esca
Leaf blotch
Leafroll
Nematodes
Peach rosette mosaic virus decline
Phomopsis cane and leaf spot
Pierce's disease
Powdery mildew
Ripe rot
Rupestris stem pitting
Septoria leaf spot
Sour bunch rot
Tar spot
Tomato/tobacco ringspot virus decline
Alphabetical listing of physiological and chemical disorders
Bird damage
Boron deficiency
Bunch stem necrosis
Chimera
Copper injury
Diuron injury
Glyphosate injury
Guttation
Hail damage
Iron deficiency
Lack of fruitset
Lightning
Magnesium deficiency
Manganese deficiency
Nitrogen deficiency
Ozone injury
Paraquat injury
Pearl bodies
Pesticide spray injury
Phenoxy herbicide (2,4-D) injury
Potassium deficiency
Roundup injury
Simazine injury
Sour soil
Spring freeze injury
Sun scald
Winter injury
Alphabetical listing of insect and mite pests
Ants
Banded grape bug
Climbing cutworms
European red mite
Fruit flies
Gallmakers (about)
Gallmakers on leaves
Grape berry moth
Grape cane gallmaker
Grape cane girdler
Grape erineum mite
Grape flea beetle
Grape leafhopper
Grape mealybug
Grape phylloxera
Grape root borer
Grape rootworm
Hornworms
Japanese beetle
Leafhoppers (about)
Leafhoppers (comparison)
Multi-colored Asian ladybeetles
Potato leafhopper
Rose chafer
Threebanded leafhopper
Twospotted spider mite
Virginia creeper leafhopper
Yellowjackets
Beneficial insects and mites
About natural enemies
Assassin bugs
Braconids
Damsel bug
Green lacewing
Ground Beetle
Ichneumonids
Lady beetles
Minute pirate bug
Multi-colored Asian ladybeetle
Parasitic wasps
Predatory mites
Robber Fly

Shield bugs
Spiders
Syrphid fly
Tachinid fly
Trichogramma wasps

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Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program
in collaboration with MSU Extension and the Michigan Agricultural Experiment Station.
Updated 12/20/07 Contact: J.N. Landis.