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Male Colorado potato beetles alter search behavior in response to prior female presence on potato plants
Journal of Pest Science ( IF 4.8 ) Pub Date : 2020-01-21 , DOI: 10.1007/s10340-019-01181-x
Donald C. Weber , Jian J. Duan , Ariela I. Haber

For Colorado potato beetle, an integrated approach including semiochemicals and other nonpesticidal tactics is essential to sustainable management. A volatile aggregation pheromone produced by male adult beetles is attractive to both females and males. Yet earlier research also indicates that males respond to a yet-unidentified female-produced sex pheromone. We investigated male Colorado potato beetle behavior on potato plants that had been exposed to females only, males only, mixed-sex groups, or no beetles (clean plants). During observation, these plants hosted no beetles except for the single experimental male beetle. These males (previously mated or unmated) responded very differently to female-exposed plants, spending longer time on these plants, undertaking characteristic active searching behavior, exploring more leaves per plant, and moving more rapidly between leaves, compared to male-exposed or unexposed plants. When presented with a three-way choice, males spent about five times longer on the female-exposed foliage, compared to either male-exposed or clean leaves. Searching parameters differed between mated and unmated males, but both showed similar reactions to female-exposed plants; there was little to no statistical interaction between male mated condition and plant treatment. Results strongly indicate the presence of a persistent female-produced pheromone significantly influencing male searching behavior and between-plant movement.

中文翻译:

雄性科罗拉多马铃薯甲虫响应于雌性先前在马铃薯植物上的存在而改变搜索行为

对于科罗拉多州的马铃薯甲虫,包括符号化学药品和其他非农药策略的综合方法对于可持续管理至关重要。成年甲虫产生的挥发性聚集信息素对雌性和雄性都具有吸引力。然而,更早的研究还表明,男性对尚未产生的女性产生的性信息素有反应。我们调查了仅暴露于雌性,仅雄性,混交性群体或没有甲虫(干净植物)的马铃薯植株上雄性科罗拉多马铃薯甲虫的行为。在观察过程中,除了单个实验雄性甲虫外,这些植物没有寄主。这些雄性(先前交配或未交配)对暴露于雌性植物的反应截然不同,在这些植物上花费更长的时间,进行有特色的主动搜索行为,每株植物探索更多的叶片,与雄性暴露或未暴露的植物相比,叶子之间的移动更快。如果选择三叶,雄性花在雌性叶子上的时间是雄性或干净叶子的五倍。交配和未交配的雄性之间的搜索参数不同,但是对暴露于雌性的植物都显示出相似的反应。雄性交配条件与植物处理之间几乎没有统计相互作用。结果强烈表明存在持久的雌性产生的信息素,该信息素显着影响雄性搜索行为和植物间运动。交配和未交配的雄性之间的搜索参数不同,但是对暴露于雌性的植物都显示出相似的反应。雄性交配条件与植物处理之间几乎没有统计相互作用。结果强烈表明存在持久的雌性产生的信息素,该信息素显着影响雄性搜索行为和植物间运动。交配和未交配的雄性之间的搜索参数不同,但是对暴露于雌性的植物都显示出相似的反应。雄性交配条件与植物处理之间几乎没有统计相互作用。结果强烈表明存在持久的雌性产生的信息素,该信息素显着影响雄性搜索行为和植物间运动。
更新日期:2020-01-21
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