Parasitism rate of Dastarcus helophoroides on Monochamus alternatus with indoor condition and under forests environment
Dastarcus helophoroides larvae and eggs were inoculated to Monochamus alternatus larvae in indoor condition, and D. helophoroides adults and egg cards were released on the infested pine logs in forest, to study the parasitism rate of D. helophoroides on M. alternatus. The results showed that: the average corrected parasitism rate was (85. 39 ±4. 61)% and (90. 00 ± 0.00) % for inoculating 6 D. helophoroides larvae and 30 D. helophoroides eggs to 1 M. alternatus larvae respectively. The total corrected parasitism rate was 65. 90% and 54. 74% for the releasing D. elophoroides adults and egg cards on the infested pine logs in forest respectively. D. helophoroides larvae had strong parasitic ability on the nearby hosts in indoor conditions. However, the parasitic activities of D. helophoroides on M. alternatus were influenced by many factors in forest.