Diagnosing problems and scouting vineyards, grapes in MI

Information for scouting vineyards and diagnosing problems
Home > pest management > scouting vineyards and diagnosing problems
The following information about 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 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. For current in-season advice and updates, see MSU Extension's Fruit Crop Advisory Team (CAT) Alert newsletters. View most recent issue:
Go to on this page: Common diseases Physiological and chemical disorders Insect and mite pests Beneficial insects and mites View slide presentations: Spring 2004 IPM Workshop

Common diseases (alphabetical listing)
Fungal diseases Powdery mildew Downy mildew Black rot Phomopsis cane and leaf spot Anthracnose Botrytis bunch rot Sour bunch rot Bitter rot Ripe rot	Angular leaf scorch Septoria leaf spot Leaf blotch Tar spot Eutypa dieback Grapevine decline or Esca Armillaria root rot Flyspeck	Bacterial diseases Crown gall Pierce's disease Virus and virus-like diseases Tomato/tobacco ringspot virus decline Peach rosette mosaic virus decline Fanleaf degeneration Leafroll Rupestris stem pitting Flavescence dorée Nematodes Nematodes
Physiological and chemical disorders (alphabetical listing)
Chemical injury Diuron injury Simazine injury Glyphosate injury Phenoxy herbicide (2,4-D) injury Paraquat injury Pesticide spray injury Copper injury	Abiotic vine condition Sun scald Bird damage Lack of fruit set Ozone injury Hail damage Bunch stem necrosis Spring freeze injury Winter injury Chimera Guttation Pearl bodies Lightning Sour soil	Nutrient deficiency Manganese deficiency Nitrogen deficiency Potassium deficiency Magnesium deficiency Boron deficiency Iron deficiency

Insect and mite pests (alphabetical listing)
Pests of buds Climbing cutworms Grape flea beetle Pests of shoots Grape cane girdler Grape cane gallmaker Mite pests of leaves Twospotted spider mite European red mite Grape erineum mite	Insect pests of leaves About leafhoppers Potato leafhopper Grape leafhopper Rose chafer Japanese beetle About gallmakers Gallmakers on leaves Hornworms Pests of fruit Grape berry moth Grape mealybug Banded grape bug	Pests during harvest Yellowjackets Fruit flies Ants Multi-colored Asian ladybeetles Pests of roots Grape phylloxera Grape root borer Grape rootworm
Beneficial insects and mites (alphabetical listing)
About natural enemies Assassin bugs Braconids Damsel bug Lacewings 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