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1 pictures total.
Pine bark adelgid on white pine
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| Severity: | 3 out of 5 |
| Frequency: | 1 out of 5 |
| Symptoms: | Light infestations do not do much to the tree. However persistent, severely heavy yearly attacks can cause twig death, some stunting, and possible death of the trees. The adelgids produce a wax while feeding. The wax is a protective cover that resembles wool, making them look like wooly aphids to which they are related. Under this waxy wool, the adelgid is teardrop shaped and black in color. |
| Cycle: | After overwintering on the tree, reproduction occurs in the spring. At least five generations are produced per year. Winged adults can be produced which fly to spruce for additional reproduction; however, this does not appear to occur in the Midwest. |
| Management: | Insecticides can be used to control these insects. Apply in May or later when adelgids are present. In the spring, applya spreader sticker with theinsecticide. |
| Associated trees: | |
