Caterpillars

As I was leaving our barn today, in my truck, I noticed a limb on a walnut tree was hanging low and the back side of several of the leaves were almost solid white. After investigating I could see the white colored leaves were covered with caterpillars and some of the surrounding branches had been defoliated.



The caterpillars were about the size of a very large grain of rice and packed tightly on the leaves.



A close-up of the caterpillars.