Primary Industries and Fisheries, Department of Employment, Economic Development and Innovation, Indooroopilly, Queensland, Australia.
Pest Manag Sci. 2010 Mar;66(3):295-300. doi: 10.1002/ps.1873.
Piperonyl butoxide (PB)-synergised natural pyrethrins (pyrethrin:PB ratio 1:4) were evaluated both as a grain protectant and a disinfestant against four Liposcelidid psocids: Liposcelis bostrychophila Badonnel, L. entomophila (Enderlein), L. decolor (Pearman) and L. paeta Pearman. These are key storage pests in Australia that are difficult to control with the registered grain protectants and are increasingly being reported as pests of stored products in other countries. Firstly, mortality and reproduction of adults were determined in wheat freshly treated at 0.0, 0.75, 1.5, 3 and 6 mg kg(-1) of pyrethrins + PB (1:4) at 30 +/- 1 degrees C and 70 +/- 2% RH. Next, wheat treated at 0.0, 1.5, 3 and 6 mg kg(-1) of pyrethrins + PB (1:4) was stored at 30 +/- 1 degrees C and 70 +/- 2% RH and mortality and reproduction of psocids were assessed after 0, 1.5, 3 and 4.5 months of storage. Finally, the potential of synergised pyrethrins as a disinfestant was assessed by establishing time to endpoint mortality for adult psocids exposed to wheat treated at 3 and 6 mg kg(-1) of synergised pyrethrins after 0, 3, 6, 9 and 12 h of exposure.
Synergised pyrethrins at 6 mg kg(-1) provided 3 months of protection against all four Liposcelis spp., and at this rate complete adult mortality of these psocids can be achieved within 6 h of exposure.
Piperonyl butoxide-synergised pyrethrins have excellent potential both as a grain protectant and as a disinfestant against Liposcelidid psocids.
增效后的胡椒基丁醚（PB）与天然除虫菊素（除虫菊素：PB 的比例为 1:4）被评估为谷物保护剂和驱虫剂，以对抗四种蜚蠊目昆虫：嗜卷书虱（Badonnel）、嗜虫书虱（Enderlein）、变色书虱（Pearman）和皮氏书虱（Pearman）。这些蜚蠊目昆虫是澳大利亚的关键仓储害虫，用已注册的谷物保护剂难以控制，并且在其他国家越来越多地被报道为仓储产品的害虫。首先，在 30±1°C 和 70±2%相对湿度下，将 0.0、0.75、1.5、3 和 6 mg kg(-1)的除虫菊素+PB（1:4）新鲜处理的小麦中测定成虫死亡率和繁殖力。接下来，将 0.0、1.5、3 和 6 mg kg(-1)的除虫菊素+PB（1:4）处理的小麦在 30±1°C 和 70±2%相对湿度下储存，并在储存 0、1.5、3 和 4.5 个月后评估蜚蠊目昆虫的死亡率和繁殖力。最后，通过建立接触 3 和 6 mg kg(-1)增效除虫菊素处理的小麦的成虫蜚蠊目昆虫的终点死亡率所需的时间，评估增效除虫菊素作为驱虫剂的潜力，在暴露 0、3、6、9 和 12 h 后。
增效后的除虫菊素在 6 mg kg(-1)的浓度下，对所有四种书虱都能提供 3 个月的保护，而且在这个浓度下，这些书虱的成虫可以在 6 小时内完全死亡。
增效后的胡椒基丁醚与除虫菊素对书虱目蜚蠊既有作为谷物保护剂的潜力，也有作为驱虫剂的潜力。
