 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| Blister spot | |
| IPM scouting in Michigan apples > blister spot | |
| Blister spot is a bacterial disease that occurs predominantly on Mutsu apple, although it is also of minor importance on RedCort and Fuji. Small, raised, brown to black blisters occur on fruit in mid- to late July. The bacteria grow on blossoms and fruit surfaces without causing symptoms initially. Fruit are most susceptible to infection about two weeks after petal fall. The occurrence of streptomycin-resistant strains of the pathogen means there are no effective controls for this disease. |  |
| Blister spot on Mutsu apple fruit. | |
Additional information
|
|
| This information was developed from A Pocket Guide for IPM Scouting in Michigan Apples by David Epstein, Larry J. Gut and George W. Sundin. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2720). | |
Site map About us Copyright/linking
05/30/08