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The caterpillars live from August to May in feeding tunnels and round chambers under the bark of tree trunks. The infestation can be recognized by the light brown caterpillar droppings, which appear in bark cracks. Preference is given to old trees and those weakened by annual tree pruning.
Borer tunnels may occur either in dry or rotting wood or under bark, in the comparatively soft, nutritious bast tissue, either dead or living. Some boring insects do not digest the wood or other medium itself, but bore tunnels in which yeasts or other fungi grow, possibly stimulated by excretions and secretions of the insects.
The caterpillars are mostly found in oak trees or on the ground under them in late spring and early summer, and do not live on fences, walls, etc. as other caterpillars do. They have very long, white hairs contrasting markedly with shorter hairs. [1] The caterpillars of several other species may be mistaken for the oak processionary. [3]
The trees in Fort Worth survived a hot and dry summer, but are now under attack from creepy crawlies. It was a long blistering summer for the trees. The last times Fort Worth saw heat this intense ...
The caterpillar is a serious pest that attacks more than 30 crops. The larva bores into the trunk or branches about 15–25 cm deep. The tunnel created is empty in the day time, but is filled with caterpillar during the night. It damages the bark of the tree resulting in dieback of the stem. Frass is visible in affected areas. [4]
The caterpillars may be found feeding on an extremely wide variety of trees, both deciduous and coniferous, including apple, birch, black locust, cherry, elm, fir, hackberry, hemlock, hickory, larch, oak, rose, spruce, chestnut, and willow. [2] Defoliating outbreaks are occasionally reported especially on Manitoba maple and elm in urban areas. [4]
Larvae prefer oak trees, but may feed on many species of trees and shrubs, both hardwood and conifer. [ 6 ] : 16 In the eastern US, the gypsy moth prefers leaves of oaks, aspen , apple , sweetgum , speckled alder , basswood , gray birch , paper birch , poplar , willow , and hawthorns , among other species. [ 26 ]
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