Gypsy Moth Defoliation in Virginia - 2005

Click here to see a larger version of the map.After bottoming out last year, gypsy moth has reappeared in a few scattered locations at seemingly moderate to high densities. Isolated reports have surfaced from Frederick, Giles, Pulaski, and Roanoke counties. During the past couple of years, very wet spring weather has made feeding larvae highly susceptible to diseases, which has helped keep populations at bay. Although we had a cool, humid spring this year, it dried out by June when peak larval activity was occurring, so it remains to be seen what kind of survival we will see through the summer. Egg mass surveys this fall will reveal whether sufficient survival occurred and whether we will see a significant resurgence next year.

In the meantime, the Slow-The-Spread Program continues to release pheromone flakes along the leading edge of the gypsy moth range, which is now along the southern edge of the Commonwealth from Bland County to Virginia Beach.