The diel periodicity of pheromone-mediated aggregations and mating and feeding cycles of Euschistus conspersus Uhler (Heteroptera: Pentatomidae) was investigated in a series of laboratory and field experiments. The aggregation response of adult E. conspersus to lures loaded with the male-produced aggregation pheromone component methyl E2,Z4-decadienoate placed on common mullein, Verbascum thapsus L., peaked in the early hours of the scotophase, at ≈2100 hours. Peak mating occurred at 2300 hours, with 78.5% of the insects in aggregations mating at this time. Aggregations dispersed and declined to 30% of their maximum level by dawn on pheromone-baited plants. Equal numbers of males and females were found within aggregations. Aggregations continued to form nightly and disperse by morning throughout a 72-h observation period on pheromone-baited and unbaited mullein plants. A laboratory analysis of feeding periodicity indicated that although feeding occurred throughout the 24-h observation period, the percentage of feeding insects was significantly higher during the scotophase. There were no differences between feeding rates of males and females. The implications of these findings for monitoring and management of E. conspersus are discussed.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 99 • No. 1