A Chemical Lure for Stink Bugs (Hemiptera: Pentatomidae) Is Used as a Kairomone by Astata occidentalis (Hymenoptera: Sphecidae)
Keywords:
Halyomorpha, digger wasp, trap, lure, pheromone, kairomoneAbstract
We tested lures in Washington and Georgia containing methyl (E,E,Z)-2,4,6-decatrienoate and/or methyl (E,Z)-2,4-decadienoate for capturing stink bug species (Hemiptera: Pentatomidae). In both states, we consistently captured adult females of the digger wasp Astata occidentalis Cresson (Hymenoptera: Sphecidae) in traps with lures that contained methyl (E,E,Z)-2,4,6-decatrienoate but not in traps with lures that contained only methyl (E,Z)-2,4-decadienoate. Astata occidentalis is a predator of pentatomid stink bugs (Hemiptera) and apparently uses methyl (E,E,Z)-2,4,6-decatrienoate as a host-finding kairomone. Methyl (E,E,Z)-2,4,6-decatrienoate is an aggregation pheromone of Plauti stali Scott (Hemiptera: Pentatomidae) that is also attractive to, and used for monitoring, the exotic brown marmorated stink bug, Halyomorpha halys Stål (Hemiptera: Pentatomidae). Wasps were captured from Jul through Sep with peak response in Aug in Washington. In Georgia, wasp capture was highest as soon as traps were deployed in late May/early Jun, and then capture peaked again during Jul.
En los estados de Washington y Georgia, probamos señuelos que contienen (E,E,Z)-2-4-6-decatrienoato de metilo y/o (E,Z)-2-4-6-decatrienoato de metilo para la captura de especies de chinches hediondas (Hemiptera: Pentatomidae). En ambos estados, capturamos consistentemente hembras adultas de la avispa excavadora Astata occidentalis Cresson (Hymenoptera: Sphecidae) en trampas con señuelos de (E,E,Z)-2-4-6-decatrienoato de metilo pero no en las trampas con señuelos de sólo (E,Z)-2-4-6-decatrienoato de metilo. Astata occidentalis es un depredador de chinches pentatómidas (Hemiptera) que aparentemente utiliza el (E,E,Z)-2-4-6-decatrienoato de metilo como una kairomona para encontrar su hospedero. El (E,E,Z)-2-4-6-decatrienoato de metilo es una feromona de agregación de Plauti stali Scott (Hemiptera: Pentatomidae) que también es atractivos y utilizado para el monitoreo del chinche exótico marmorado, Halyomorpha halys Stål (Hemiptera: Pentatomidae). Las avispas fueron capturadas desde julio hasta septiembre, con la respuesta más alta en agosto en el estado de Washington. En Georgia, la captura de avispas obtuvo un punto alto tan pronto como las trampas fueron puestas en de final del mes de mayo/principio de junio, y luego la captura alcanzó otro punto máximo de nuevo durante julio.
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