Red Pine Sawfly
Neodiprion nanulus nanulus |
| 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. |
The red pine sawfly prefers red and jack pines of all sizes, but it will also attack white, Japanese red, and mugho pines. Because only the old needles are consumed, vigorous trees are rarely killed by a single defoliation. Successive defoliations, however, can kill or reduce the growth rate of overmature trees.
This sawfly overwinters in the egg stage; larvae emerge in May, and feed in colonies during July and August. Larvae are dull grayish-green with two olive-colored stripes along the back and two dark stripes on each side; they have black heads. Pupation occurs in the duff, and adults emerge in the fall. There is one generation per year.
[ Contents ]
[ Previous ]
[ Next ]
[ Home ]
|
