Plant volatiles moderate response to aggregation pheromone in Colorado potato beetle
Plant volatiles moderate response to aggregation pheromone in Colorado potato beetle
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DOI：
10.1111/j.1439-0418.2005.01014.x
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发表时间：
2006-02-01
影响因子：
1.9
通讯作者：
Dickens, JC
中科院分区：
文献类型：
--
作者：
Dickens, JC
测定了科罗拉多州马铃薯甲Leptinotarsa decemlineata对雄性产生的聚集信息素(S)-3，7-二甲基-2-氧代-6-烯-1，3-二醇[由(Z)-3-己烯基乙酸酯+(+/-)-芳樟醇+水杨酸甲酯组成]和其他马铃薯挥发物(壬醛和2-苯乙醇)的定向度。所有化合物先前在气相色谱/电传导图耦合实验中都被证明是活性的。三元植物引诱剂混合物和2-苯乙醇对成虫均有引诱作用。与对照相比，雄性甲虫更倾向于两种植物引诱剂，而雌性甲虫几乎没有表现出偏好。将植物引诱剂与信息素结合在一起，会产生类似于单独使用其中一种植物引诱剂的性二型性反应。添加正庚醛消除了对信息素+2-苯乙醇混合物的性二形性反应；新的三组分混合物对两性都有吸引力。在实验室生物测定和田间试验中，信息素+三组分植物引诱剂的组合比单独使用植物引诱剂更受欢迎。因此，似乎信息素+植物挥发物的组合对于田间使用可能是最有效的。
The orientation of the Colorado potato beetle, Leptinotarsa decemlineata, to a male-produced aggregation pheromone, (S)-3,7-dimethyl-2-oxo-oct-6-ene-1,3-diol, a three-component plant attractant blend [comprised of (Z)-3-hexenyl acetate + (+/-)-linalool + methyl salicylate], and other potato volatiles (nonanal and 2-phenylethanol) were tested. All compounds were previously shown to be active in coupled gas chromatography/electroantennogram experiments. Both the three-component plant attractant blend and 2-phenylethanol were attractive to adult beetles. While male beetles oriented preferentially to both plant attractants vs. a control, females showed little preference. Combining the plant attractants with the pheromone resulted in sexually dimorphic responses similar to those seen with either plant attractant alone. Addition of nonanal abolished the sexually dimorphic response to the pheromone + 2-phenylethanol blend; the new three-component blend was attractive to both sexes. In both laboratory bioassays and field experiments, a combination of the pheromone + the three-component plant attractant was preferred over the plant attractant alone. Thus, it seems likely that combinations of pheromone + plant volatiles may be the most efficacious for field use.