| Of these pests, the mimosa webworm is the most serious, especially for thornless varieties. |
| Butterfly larvae tend to be solitary, or sparsely distributed, whereas pest caterpillars, such as fall webworm, make tents and hatch in the hundreds. |
| Fall webworm is generally nondiscriminating in its choice of plants. |
| In a second set of boxes, fall webworm caterpillars, dietary generalists, were provided with oak, maple, and tulip tree. |
| It is the fall webworm that concerns us, as it feeds on apples, ash, birch, chokecherry, elm, hickory, linden, oaks, willow, and more than 100 fruit, shade and woodland trees. |
| The webworm has evolved, along with our climate changes, so that it is completely adapted to our environment. |
