Adult Eclosion of Monochamus alternatus

Monochamus alternatus , a major vector of the fatal disease PWN, emerges from dead pine woods from late May through late July, with the peak number mainly in mid June depending on where the woods come from Both male and female adults come out from the wood most frequently at 18:00 pm 20:00 pm, contributing 28% to the total The ratio of eclosion and emergence varied among different locations, while the pine wood nematode, Bursaphelenchus xylophilus , negatively affects the ratio in the same wood source