Brooks fruit spot

Disease

Brooks fruit spot

Mycosphaerella pomi (Pass.) Lindau

Distribution: Occurs throughout the northeastern and mid-Atlantic US and has been reported in Canada.

Photos

On lighter skinned varieties, lesions turn dark green.

On lighter skinned varieties, lesions turn dark green. Michael Szkolnik, Cornell Univ.
B

Appears as irregular, slightly sunken dark green lesions on immature fruit. On red-skinned varieties, fully developed lesions are dark red to purple and are generally no larger than 10 mm in diameter (A). On lighter-skinned varieties, lesions turn dark green. Brooks fruit spot does not cause significant browning of the flesh beneath the lesion (B).

  • Crops Affected: apples

    Management

    The disease is of minor importance because it is usually controlled by fungicides applied to control other diseases. Occasionally seen on Jonathan, Golden Delicious, Grimes Golden, Rome Beauty, Stayman, and Winesap.

    Similar Species

    Symptoms can be confused with physiological disorders such as bitter pit and Jonathan spot, but these disorders do not appear until later in the season. The disease may also be confused with stink bug damage.

About

Resources

Events

Michigan State University
  • Spartans Will.
  • © Michigan State University

MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential.

Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. This information is for educational purposes only. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.

The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707.

We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA).