Unique turf injury caused from bermudagrass mites (07-20-2009)

If you have noticed small tufts of grass blades in your bermudagrass lawn that are light green to yellow and curl abnormally into small withches brooms or cabbage heads, it is most likely the symtpoms of bermudagrass mites. Bermudagrass mites are very specific in that they only attack bermudagrass and are so tiny that they can only be seen with a 20X hand lens or microscope. Several generations can occur each summer with as many as 100 or more hidden within the leaf sheath of just one leaf blade. When populations become this great the turf can be severely damaged and even die.

Since the mites are well protected within the leaf sheaths they are very diffiuclt to control with pesticides. To be effective thorough applications are essential. Good cultural management is probably the most effective control for home lawns. Keeping the turf growing vigorously may help the plants tolerate minor infestations and damage. A close mowing, then collecting the clippings and disposing of them, will remove many of the mites and their eggs. Thorough watering will help minimize turf stress, keep the grass vigorously growing and also help keep the mite population down somewhat as they seem to enjoy hot dry conditions.

Published July 20, 2009

Dr. Wayne Wells is an Extension Professor and Turfgrass Specialist. His mailing address is Department of Plant and Soil Sciences, Mail Stop 9555, Mississippi State, MS 39762. wwells@ext.msstate.edu