金龟甲广谱引诱剂配方筛选及田间评价

Field screening and evaluation of broad spectrum attractants of scarab beetles

【目的】为了探讨国内外已经报道的金龟甲性信息素或植物源引诱剂对河南花生产区金龟甲的诱捕效果,以便实现"地下害虫地上治理"的目标。【方法】作者于2016年6月2日至8月31日,在驻马店和许昌两个地区,比较了10种候选引诱剂的诱捕效果。【结果】暗黑鳃金龟是两个地区占绝对优势的种类。暗黑鳃金龟性信息素二元成分R-(-)-芳樟醇与L-异亮氨酸甲酯组成的3个配方(1︰4、1︰5、1︰7),平均累计诱捕量显著大于其他候选引诱剂及对照空白诱捕器,但3种不同配比的捕获量之间没有显著性差异。【结论】在以暗黑鳃金龟为优势种的花生产区,我们推荐采用1︰4的R-(-)-芳樟醇︰L-异亮氨酸甲酯作为活性成分,以500?L的总剂量混入0.5%的琼脂胶载体中,于6月13日至7月23日之间即该金龟甲成虫的发生盛期实施大田诱捕。

[Objectives] To achieve the goal of ＂managing underground pests above ground＂, the authors investigated the effectiveness of previously reported scarab attractants on several dominant scarab species in peanut growing areas in Henan province. [Methods] We compared the effectiveness of 10 candidate attractant blends in Xuchang and Zhumadian, from June 2, 2016 to August 31, 2016. [Results] Holotrichia parallela was the dominant scarab beetle in two field sites. Trap catches of three blends comprised ofH. parallela sex pheromone components [in which ratios of R-（-）-linalool to L- isoleucine methyl ester were 1 ： 4, 1 ： 5, and 1 ： 7, respectively] were significantly higher than those of blank traps, as well as traps with other candidate lures, but there was no significant difference in the numbers of scarab beetles caught among the binary blends of R-（-）-linalool and L-isoleucine methyl ester mixed in different ratios. [Conclusion] The optimal lure [500 ~tL of R-（-）-linalool and L-isoleucine methyl ester blended at 1 ： 4, then formulated in 0.5% agaropectin] is recommended for use in peanut growing areas where H. parallela is the dominant species and should be applied between 13 June and 23 July.