Information for scouting and diagnosing disease problems

The following information on the biology of common diseases can assist with 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. For disease management recommendations, consult the Fruit Management Guide.

Alternaria leaf spot and fruit rot
Anthracnose fruit rot (ripe rot)
Armillaria root rot
Bacterial canker
Botryospaeria stem blight
Botryospaeria stem canker
Botrytis blight and fruit rot
Crown gall
Cylindrocladium rot
Dodder
Exobasidium fruit and leaf spot
Fusicoccum canker
Leaf mottle
Leaf rust
Leaf spot diseases (various)
Mosaic
Mummy berry

Fact Sheets:
Fruit Rot Identification Guide (pdf)
Mummyberry
Shoestring Virus in Highbush Blueberries
Phomopsis Disease in Michigan Blueberries

MSU Fruit CAT Alert Articles:
Pre-harvest Fungicides for Blueberries (2004)
Timing is Important for Control of Anthracnose in Blueberries (2004)
Monitor for Mummy Berry in Blueberries (2004)
Elevate Recommendations for Suppression of Mummyberry (2003)
Topsin-M Section 18 Granted for Blueberries (2003)
Blueberry Freeze Injury or Phomopsis? (2003)
Indar Section 18 on Blueberries in 2003 (2003)
Mummyberry Update for Blueberry Growers (2003)
Mummyberry Update (2002)

Other Links:
Introduction to Scouting (pdf)
Short-term Costs and Returns to Michigan Apple, Blueberry, and Tart Cherry Enterprises with Reduced Pesticide Availability (pdf)
Blueberry Fruit Rot Identification Guide (pdf)
Blueberry Diseases in Michigan (pdf)
Section 18 label for Indar (pdf)
MSU Extension Educational Materials