Paralobesia viteana (Clemens), grape berry moth, is a major pest of grapes in Eastern North America. There is substantial regional variation in the response of male P. viteana to sex pheromone-baited monitoring traps in Michigan vineyards. Males are readily captured in traps in the southwest region, whereas in the northwest very few males are captured, despite larval infestation in grapes in both regions. Y-tube olfactometers and field experiments determined the response of male moths from northern and southern populations to the pheromone blend used in monitoring lures and to females from both regions. In Y-tube choice tests, males responded similarly to the standard pheromone blend, and males did not preferentially choose females from either region. In field trials, traps baited with unmated females were deployed to test the preference of resident males for females from the two regions and for standard pheromone lures. In southwest Michigan vineyards, significantly more males were caught in traps with a 1.0-µg standard pheromone lure than in traps with captive females collected from vineyards in both regions or in traps with a blank lure control. A similar pattern of male captures among lure treatments was observed in northwest vineyards, although many fewer males were trapped and differences among treatments were not significant. We conclude that the observed regional differences in male response to pheromone traps are not caused by variation in pheromone-mediated behavioral responses, suggesting that other biotic and/or abiotic differences determine the regional variation in captures of this species.

中文翻译：

---

密歇根州监测陷阱中雄性 Paralobesia viteana（鳞翅目：Tortricidae）捕获量的区域变化不是由于雄性对信息素反应的地理差异

Paralobesia viteana (Clemens)，葡萄浆果蛾，是北美东部葡萄的主要害虫。雄性 P. viteana 对密歇根葡萄园中性信息素诱饵监测陷阱的反应存在很大的区域差异。在西南地区，雄性很容易被陷阱捕获，而在西北部，尽管两个地区的葡萄都受到幼虫侵扰，但很少有雄性被捕获。Y 型管嗅觉仪和现场实验确定了来自北方和南方种群的雄性飞蛾对用于监测诱饵的信息素混合物和来自这两个地区的雌性飞蛾的反应。在 Y 型管选择测试中，男性对标准信息素混合物的反应相似，男性不会优先选择来自任一区域的女性。在田间试验中，部署了以未交配的雌性为诱饵的陷阱，以测试常住雄性对来自两个地区的雌性和标准信息素诱饵的偏好。在密歇根州西南部的葡萄园中，用 1.0-µg 标准信息素诱饵诱捕的男性明显多于从两个地区的葡萄园收集的圈养雌性诱捕器或使用空白诱饵控制的诱捕器。在西北部的葡萄园中，在诱饵处理中观察到类似的雄性捕获模式，尽管被诱捕的雄性要少得多，并且处理之间的差异不显着。我们得出结论，观察到的雄性对信息素陷阱反应的区域差异不是由信息素介导的行为反应的变化引起的，这表明其他生物和/或非生物差异决定了该物种捕获的区域差异。