Elm zigzag sawfly adults were trapped in Delaware ... The larvae are up to a half-inch long, resemble caterpillars and are light green in color. They feed exclusively on elm leaves, from both ...

Adults emerge (Fig. 1), mate and lay eggs that hatch after about 10 - 14 days. Larvae (Fig. 2) are often found in late May to early June. The larvae appear in mid to late May and will cause window ...

Grass Sawfly For initial detection in late April – early May, take 5 sweeps in 5 sites especially along field margins; Once larvae are detected examine five linear foot of row in 10 sites for the ...

Local arborists are encouraging Illinois residents to keep an eye out for a spreading invasive insect this spring. Jess ...