New Jersey agricultural officials say it also appears the gypsy moth population is shifting from South Jersey to northwestern parts of the state.
They recently conducted an aerial survey of tree defoliation. It found nearly 340,000 acres affected by gypsy moths. That's a 6 percent increase from last year.
Gypsy moths are a problem in 17 of New Jersey's 21 counties. But eight of those counties are reporting less damage this year than in 2007.
