P&PDL Picture of the Week for
May 24, 2010

Hawthorn leaf mining sawfly (Profenusa canadensis)

Gail Ruhl, Senior Plant Disease Diagnostician, Department of Botany & Plant Pathology, Purdue Univ.

Do the leaves on your hawthorn trees look blighted? Have you been watering the tree because you thought the scorched leaves were due to drought? You need to look more closely at those leaves. Hold a leaf up to the light and you will see that they have been 'mined' by a sawfly insect pest called hawthorn leaf miner. Additional images and information are available at a previous picture of the week article, Hawthorn Leafminer.

Click image to enlarge

Leafminer damage on leaf


Purdue Plant & Pest Diagnostic Lab Purdue Cooperative Extension Service