Distribution and monitor of nematode in the adults body of pine sawyer

In order to monitor nematodes (Bursaphelenchus xylophilus (Steiner et Buhrer) Nickle) in the adult body of pine sawyer (Monochamus alternatus Hope) at the scene of pine forest short-timely, nematode's distribution in the adult body has been studied by using a portable microscope and a method of dissecting adults. The result showed that there are 87.9% nematodes distributing in the abdomen of adult, and an average of 498.5 nematodes concentrating in the phallus. It only takes an average of 1.57min to define whether there is nematode or not in the adult body. The male adults pass the nematodes in phallus by mating to the female genitalia, and then pass the nematodes to the cambium of pine trees again by egg-laying.