关键词: 云杉花墨天牛, 管氏肿腿蜂, 松褐天牛肿腿蜂, 白蜡吉丁肿腿蜂, 生物防治

Abstract: At present, many studies have proved that parasitoids of Sclerodermus spp. can control the longhorned beetle pest effectively. But there are no reports of controlling Monochamus saltuarius using Sclerodermus spp. The aim of this research is testing control efficiency of Sclerodermus spp. on M. saltuarius, and selecting a specie of Sclerodermus spp. that can control M. saltuarius effectively. Larvae of M. saltuarius were inoculated into cut logs of Pinus koraiensis to simulate the natural conditions, and then three species of Sclerodermus spp. (S. guani, S. alternatusi and S. pupariae) were released with different wasp-pest ratio (4:1, 2:1, 1:1 and 1:2) to determine the parasitic efficiency on M. saltuarius larvae in the laboratory. S. guani is the most widely used among the three parasitoid in China, so the control effect of S. guani on M. saltuarius was further tested in forest. The results showed that: The parasitic rates of the three parasitoids have no significant differences with the same wasp-pest ratio in the laboratory. The corrected mortality of M. saltuarius was the highest with wasp-pest ratio 4:1, and the corrected mortality of M. saltuarius were 95.65%, 71.43%, and 61.90%, after releasing S. guani, S. alternatusi, and S. pupariae, respectively. In forest, the corrected mortality of M. saltuarius reached 39.20% after releasing S. guani with wasp-pest ratio 2:1. It is concluded that S. guani is likely to apply to control M. saltuarius in forest, for its better parasitic effect than the other two species of Sclerodermus spp., and the recommended releasing wasp-pest ratio is 2:1.

Key words: Monochamus saltuarius, Sclerodermus guani, Sclerodermus alternatusi, Sclerodermus pupariae, biological control