Jack Pine Tip Beetle
Conophthorus banksiamae |
| USDA Forest Service. 1979. A guide to common insects and diseases of forest trees in the northeastern United States. Northeast. Area State Priv. For., For. Insect and Disease Management., Broomall, PA. p. 123, illus. |
Jack pine is the primary host of this tip beetle, but Scots and red pines may also be attacked when they are associated with jack pine. Elongating shoots of jack pine begin to wilt in June, and by midsummer infested twig tips turn red or brown. Examination shows an entrance hole with a pitch tube from ½ to 1 inch below the terminal bud cluster. The inside of the tip is tunneled out and may contain a white legless grub, pupa, or the adult beetle. The injury results in excessive branching in the upper half of the tree crown. There are two broods per year.
[ Contents ]
[ Previous ]
[ Next ]
[ Home ]
|
