Serviceberry disease - Ask Extension
Sprayed with mildew product several weeks ago to no avail. Continues to spread. Please provide Diagnosis, treatment, and prognosis for next spring. Ph...
Knowledgebase
Serviceberry disease #268097
Asked August 06, 2015, 1:45 PM EDT
Sprayed with mildew product several weeks ago to no avail. Continues to spread. Please provide Diagnosis, treatment, and prognosis for next spring. Photos att'd. Single leaf photo, could not add or delete. Problem effects > 75% of bush.
edited to add photo
edited to add photo
Wayne County Michigan
Expert Response
This does not look like mildew. Even if it was, once a fungal disease has appeared, a fungicide cannot cure it. Fungicides can only prevent.
This looks more like insect damage and a fungicide will not bother insects. You need to determine if damage is still occurring or if it has stopped. The missing portions of leaves and the tan areas that appear to be skeletonized look like possibly Japanese beetle. But they are almost done for this year. Look for insects in the early evening. If damage is still happening, there have to be eaters.
Unfortunately, the photos are not clear. If you want to send a sample to the MSU Diagnostic Lab, you can download forms at: www.pestid.msu.edu
This looks more like insect damage and a fungicide will not bother insects. You need to determine if damage is still occurring or if it has stopped. The missing portions of leaves and the tan areas that appear to be skeletonized look like possibly Japanese beetle. But they are almost done for this year. Look for insects in the early evening. If damage is still happening, there have to be eaters.
Unfortunately, the photos are not clear. If you want to send a sample to the MSU Diagnostic Lab, you can download forms at: www.pestid.msu.edu
