Identify the insect and apply pesticides recommended for that particular scale. Most scales can be controlled with dormant oil applied in spring. Use properly timed sprays to control crawlers. The leaves may be eaten by anyone of several caterpillars. These can be controlled with sprays once identified.
Mites cause speckling and yellowing of the leaves.
This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. This information becomes public property upon publication and may be printed verbatim with credit to MSU Extension. Reprinting cannot be used to endorse or advertise a commercial product or company. Please read our disclaimer for important information about using our site.