Prevent the insect infestations by keeping trees healthy with regular fertilization. Regular inspections of the trunk and branches are suggested for early detection of scales.
Control scales with properly labeled insecticides when the crawlers are active.
Identify the specific scale involved to time the sprays properly. Certain caterpillars can be controlled with sprays of Bacillus thuringiensis. Insect identification allows proper spray recommendations to be made. 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.