What worm/caterpillar is eating plant

Asked October 5, 2017, 8:31 AM EDT

This 8 foot bush has been completely defoliated by a 1-2" white worm with a yellowish underbelly and black spot head. It curls into a circle, several will be together under a leaf. What is it, what to do?

Caroline County Maryland

1 Response

This looks like the larvae of the dogwood sawfly, eating the leaves of a red twig dogwood. This late in the season, it is not of great concern.
It doesn't necessarily happen every year. You may never have the problem again.

Keep an eye out for them next year. You can pick them off into a bucket of soapy water, or spray them when they are small with horticultural oil.