02109naa a2200217 a 450000100080000000500110000800800410001910000230006024501620008326000090024552014530025465000310170765000200173865000160175865000100177465000150178465000100179970000170180970000170182677300480184321186652020-01-20       2019    bl uuuu     u00u1 u    #d1 aSILVA, C. S. B. D.  aWater-Deprived Parasitic Wasps (Pachycrepoideus vindemmiae) Kill More Pupae of a Pest (Drosophila suzukii) as a Water-Intake Strategy.h[electronic resource]  c2019  aMost organisms must ingest water to compensate for dehydration. In parasitic wasps, the importance of water and the behaviors driving its consumption are poorly understood. Here, we describe a waterintake strategy of Pachycrepoideus vindemmiae, a parasitoid of spotted-wing drosophila (SWD, Drosophila suzukii). Longevity measurements indicated that P. vindemmiae benefits from drinking water and from host-feeding on the water-rich hemolymph of SWD pupae. After exposing wasps to different water regimens, we observed increased host-feeding in water-deprived wasps despite honey availability. This resulted in greater SWD mortality because the host-feeding process killed the pupae, and because wasps that engaged in greater host-feeding parasitized more hosts. Behavioral observations showed that the host-feeding time of water-deprived wasps doubled compared to water-fed individuals. Host-feeding did not affect parasitoid offspring mortality. We conclude that P. vindemmiae benefits from ingesting water and that it host-feeds on SWD pupae as a water-intake strategy. These are interesting findings not only because water has rarely been reported as a critical nutrient for adult parasitoids, but especially because preying for the purpose of hydration is not a common strategy in nature. This strategy enhances parasitoid survival and reproduction, with positive consequences for its host-killing capacity and potential as a biocontrol agent.  aPachycrepoideus vindemmiae  aParasitic wasps  aParasitoids  aWater  aHospedeiro  aVespa1 aPRICE, B. E.1 aWALTN, V. M.  tOpen Access Scientific Reportsgv. 9, 2019.