The worms (or caterpillars) have been eating the leaves of the oak tree, and there are evidently so many that the reader claims to hear the creatures eating the tree. Leaf-eating bugs such as aphids, caterpillars or mining insects can make the foliage of citrus trees look unattractive. The biggest threat they cause is defoliation as they eat tree leaves. Q: My husband and I found these worms/caterpillars eating the leaves of a black walnut tree at the edge of our pasture. The leaf-eating caterpillars have been confirmed in several counties surrounding Athens, including Clarke, Madison, Oglethorpe and Oconee. A: Their eponymous name is walnut caterpillar, Datana integerrima. This morning I saw many caterpillars on the leaves. The caterpillars will stop feeding and pupate in another week or two, and the tree most likely will leaf out normally next year. Caterpillars eating my River Birch. This caterpillar is relaxed and engaged in eating. Oak Tree Leaf Eating Caterpillars. My question is what should I do about these? Could these also be army worms? Caterpillars such as webworms, tent caterpillars and bagworms can invade trees throughout the year. I have attached several pictures. I have a river birch tree in my yard. A fine blue line runs along each side of the body, and characteristic white footprint-shaped markings run down the center of … The yellow stripes are four to the side with the black line down the back being twice the width of all the other stripes. Caterpillars Eating Elm Leaves. They usually occur in periodic outbreaks of a few years at a time, though the interval between outbreaks and how long that outbreak lasts depends on the species and environmental conditions. The spines on the caterpillar, though intimidating, are harmless. Researchers at the University of Georgia are tracking an outbreak of caterpillars that can eat and strip the leaves off oak trees, potentially affecting the tree's health for a year or more. In the past week, I have noticed several branches with the leaves all skeltonized. Young elm tree with caterpillars. Asked October 27, 2014, 10:43 AM EDT. Forest tent caterpillars are North American natives that feed on the leaves of hardwood trees, including oaks. The caterpillars eat the leaves of a wide variety of trees, but particularly like oak and hickory leaves. A native of the Caribbean region, oleander plant caterpillars are an enemy of oleanders in the coastal areas of Florida and other southeastern states. The caterpillar is approximately two inches long, hairy and brownish-grey in color. Though not all visible here, there were at least eight caterpillars on the tree below. What type of caterpillar has eight full length yellow stripes on a black body with a black head and grey to white fuzzy hair? Oleander caterpillar damage is easy to recognize, as these oleander pests eat the tender leaf tissue, leaving the veins intact. 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