Capacity of Transmitting Bursaphelenchus xylophilus by the Vector Monochamus alternatus Adults

To determine the capacity of transmiting Bursaphelenchus xylophilus by the vector Monochamus alternatus adults, the supplementary nutrition on cortical part of twigs was investigated in glass jars indoor and in wire mesh in forest with pine sawyer beetle adults newly eclipsed throughout its lifespan. The results indicated that the main parts that pine sawyer beetles feeded on were the cortical part of 1-year-old young twigs (accounted 81.96%), 2-year-old and 3-year-old branchs. The adults' feeding area in wire mesh was compared with the feeding area in forest. The data showed that one M. alternatus adult could kill 4.06 (1.0-12.9) of P. massoniana plants at 18 (14-23)-year-old, demonstrating that M. alternatus adults had a huge transmitting capacity of B. xylophilus. In the epidemic area of pine wilt disease, the death number of host trees caused by the disease and the disease occurrence area could be predicted through the survey on the population of pine sawyer. Simultaneously, the data also showed that cont