Integrated pest management resources for Michigan Michigan State University home IPM Michigan home

IPM Scouting in Stone Fruits

Search

Christmas trees
Field crops
Fruit
Home and yard
Nursery and landscape
Turfgrass
Vegetable


Diagnostic Services
Soil/Plant Nutrient Lab
Enviro-weather
Regional IPM Center
Pesticide safety
Organic: New Ag Network
Invasive species
Sustainable ag & food systems


MSU ANR departments
MSU Extension

Site index
Contacts/permissions
X- Disease
IPM scouting in stone fruits > X-Disease
 X-Disease is found in peach, nectarine, sweet and tart cherry in the Great Lakes states and occasionally in the mid-Atlantic states. In peach, leaves on isolated limbs curl inward after about two months of growth and develop irregular yellow to reddish-purple spots that soon drop out, resulting in tattered leaves.

Fruit on infected limbs will drop prematurely. Infected cherry trees on Mahaleb rootstock die suddenly in midsummer, and trees on Mazzard rootstock decline slowly. Scattered fruit on trees on Mazzard rootstock are smaller than normal, are green or pink at harvest, and have a bitter taste. Enlarged stipules may be associated with infected leaves of sweet cherry cultivars on Mazzard rootstock.
Leafhopper
The pathogen is leafhopper transmitted.
X-disease X-disease
Leaves on affected limbs fall prematurely, starting at the bases of the shoots and leave tufts of leaves at the tips of infected shoots.
Additional information
Images on this page provided by Alan L. Jones.

This information was developed from A Pocket Guide for IPM Scouting in Stone Fruits by David Epstein, Larry J. Gut, Alan L. Jones and Kimberly Maxson-Stein. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2840).
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
Email the web developer.
Updated 7/24/07