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4 results for “Telenomus podisi”
Figure 1 in Toxicity of insecticides to the egg parasitoids Telenomus podisi and Trissolcus teretis (Hymenoptera: Scelionidae)
Figure 1 Bioassay setup. Potter Spray Tower (A), experimental cage (B), Duran tube with adult parasitoids inside covered with aluminum foil used to introduce the wasps into the experimental cage (C), glass plate being sprayed with the Potter Spray Tower before the setup of the experimental cage (D), adult cages mounted with the Duran tube connected (E), experimental cages setup with circulating air flow allowing the elimination of possible toxic gases (F).
Fig. 1 in Telenomus podisi parasitism on Dichelops melacanthus and Podisus nigrispinus eggs at different temperatures
Fig. 1. Distribution of lifetime parasitism of Telenomus podisi Ashmead (Hymenoptera: Scelionidae) in Dichelops melacanthus eggs (Dallas) (Hemiptera: Pentatomidae) at different temperatures. (A) 15 °C, (B) 20 °C, (C) 25 °C, (D) 30 °C at 80 ± 10% RH and a 14:10 h (L:D) photoperiod. Arrows indicate parasitism of 80%.
Learning can be detrimental for a parasitic wasp: R scripts and Telenomus podisi data
<p>Animals have evolved the capacity to learn, and the conventional view is that learning allows individuals to improve foraging decisions. We describe a first case of maladaptive learning where a parasitoid learns to associate chemical cues from an unsuitable host, thereby re-enforcing a reproductive cul-de-sac (evolutionary trap). <i>Telenomus podisi</i> parasitizes eggs of the exotic stink bug <i>Halyomorpha halys</i> at the same rate as eggs of its coevolved host, <i>Podisus maculiventris</i>, but the parasitoid cannot complete its development in the exotic species. We hypothesized that <i>T. podisi </i>learns to exploit cues from this non-coevolved species, thereby increasing unsuccessful parasitism rates. We conducted bioassays to compare the responses of naïve <i>vs</i>. experienced parasitoids on chemical footprints left by one of the two host species. Both naïve and experienced females showed a higher response to footprints of <i>P. maculiventris</i> than of <i>H. halys</i>. Furthermore, parasitoids that gained an experience on <i>H. halys</i> significantly increased their residence time within the arena and the frequency of re-encounter with the area contaminated by chemical cues. Maladaptive learning in the <i>T. podisi</i> - <i>H. halys</i> association is expected to further decrease parasitoid reproductive success and have consequences for population dynamics of sympatric native and exotic host species.</p>
Learning can be detrimental for a parasitic wasp: R scripts and Telenomus podisi data
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