Athanassiou Christos G, Hasan M Mahbub, Phillips Thomas W, Aikins M Jamie, Throne James E
Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou str., 38446, N. Ionia Magnesia, Greece. USDA, Agricultural Research Service, Center for Grain and Animal Health Research, 1515 College Avenue, Manhattan KS 66502-2736, USA.
Department of Entomology, 123 W. Waters Hall, Kansas State University, Manhattan, KS 66506-4004, USA. Laboratory of Post-harvest Entomology, Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh.
J Econ Entomol. 2015 Jun;108(3):1422-8. doi: 10.1093/jee/tov069. Epub 2015 Apr 7.
The psocid species Liposcelis paeta Pearman, Liposcelis entomophila (Enderlein), Liposcelis decolor (Pearman), Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae), and Lepinotus reticulatus Enderlein (Psocoptera: Trogiidae) were evaluated in laboratory bioassays to determine their susceptibility to six concentrations of methyl bromide (0.027, 0.113, 0.280, 0.393, 0.452, and 0.616 g/m3) after 48 h of exposure at 27.5°C. The life stages that were evaluated were adults (for all species), nymphs (for all species except Lep. reticulatus), and eggs (for L. entomophila, L. decolor, and L. bostrychophila). Adults and nymphs were very susceptible, and complete mortality was recorded at concentrations between 0.027 and 0.280 g/m3. In contrast, eggs were by far more tolerant than adults and nymphs for all species tested. At 0.027 g/m3, mortality did not exceed 53%, while survival was high even at 0.113 g/m3. Complete (100%) egg mortality was recorded at 0.393 g/m3 for L. decolor and at 0.452 g/m3 for L. entomophila and L. bostrychophila; concentrations estimated to give 99% mortality for eggs of these three species were 0.710, 1.044, and 0.891 g/m3, respectively. These results show that stored-product psocids are susceptible to methyl bromide, but concentrations of ≥0.452 g/m3 should be used to control all life stages.
在实验室生物测定中，对书虱种类佩氏嗜卷书虱（Liposcelis paeta Pearman）、嗜虫书虱（Liposcelis entomophila (Enderlein)）、无色书虱（Liposcelis decolor (Pearman)）、嗜卷书虱（Liposcelis bostrychophila Badonnel，啮目：书虱科）和网纹虱啮（Lepinotus reticulatus Enderlein，啮目：虱啮科）进行了评估，以确定它们在27.5℃下暴露48小时后对六种浓度甲基溴（0.027、0.113、0.280、0.393、0.452和0.616 g/m³）的敏感性。所评估的虫态为成虫（所有种类）、若虫（除网纹虱啮外的所有种类）和卵（嗜虫书虱、无色书虱和嗜卷书虱）。成虫和若虫非常敏感，在浓度为0.027至0.280 g/m³之间记录到完全死亡。相比之下，对于所有测试种类，卵远比成虫和若虫更具耐受性。在0.027 g/m³时，死亡率不超过53%，即使在0.113 g/m³时存活率也很高。无色书虱在0.393 g/m³时记录到卵完全（100%）死亡，嗜虫书虱和嗜卷书虱在0.452 g/m³时记录到卵完全死亡；估计使这三种书虱卵死亡率达到99%的浓度分别为0.710、1.044和0.891 g/m³。这些结果表明，储粮书虱对甲基溴敏感，但应使用≥0.452 g/m³的浓度来控制所有虫态。
