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opencc-by-4.0Dec 2016View details →

Fig. 2. Type II in Effect of temperature on functional response of Aphidius gifuensis (Hymenoptera: Braconidae) parasitizing Myzus persicae (Hemiptera: Aphididae)

Fig. 2. Type II functional response curves fitted by Roger's random parasitoid equation (RRPE) of Aphidius gifuensis against Myzus persicae at various temperatures.

opencc-by-4.0Dec 2016View details →

Fig. 1. Type II in Effect of temperature on functional response of Aphidius gifuensis (Hymenoptera: Braconidae) parasitizing Myzus persicae (Hemiptera: Aphididae)

Fig. 1. Type II functional response curves fitted by Holling's disc equation (HDE) of Aphidius gifuensis against Myzus persicae at various temperatures.

opencc-by-4.0Jun 2022View details →

Figure 1 in Host instars preference, density-dependent parasitism and behavioral perspective of parasitoids (Aphidius colemani, Aphidius matricariae and Aphelinus abdominalis) in Aphis glycines and Aphis gossypii

Figure 1: Comparison of parasitoids (Ad.colemani, Ad.matricariae and Al.abdominalis) on different ages (nymphal instars) of the(A) As.glycines (n= 30) and (B) As. gossypii (n= 30).

Figures 21–26 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figures 21–26. Aphidius apolloni sp. nov., holotype female. (21) Fore wing. (22) Antenna. (23) Part of antenna (scapus, pedicel, F1, F2). (24) Propodeum, dorsal view. (25) Tergite 1, dorsal aspect. (26) Ovipositor sheath, lateral aspect.

Figures 11–20 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figures 11–20. Fore wings of females. (11) Aphidius colemani Viereck, 1912. (12) Aphidius transcaspicus Telenga, 1958. (13) Aphidius avenae Haliday, 1834. (14) Aphidius matricariae Haliday, 1834. (15) Aphidius salicis Haliday, 1834. (16) Aphidius sussi Pennacchio and Tremblay, 1988. (17) Aphidius rosae Haliday, 1834. (18) Aphidius uzbekistanicus Luzhetzki, 1960. (19) Aphidius smithi Sharma and Subba Rao, 1959. (20) Aphidius urticae Haliday, 1834.

opencc-by-4.0Dec 2006View details →

Figures 1–9 in A new species of Aphidius Nees, 1818 (Hymenoptera, Braconidae, Aphidiinae) attacking Uroleucon aphids (Homoptera, Aphididae) from Iran and Iraq

Figures 1–9. Aphidius persicus sp. n. (1–8) Paratype female. (1) Head and mouthparts. (2) First and apical antennal flagellomeres. (3) Mesonotum. (4) Fore wing. (5) Propodeum. (6) Tergum 1, dorsal view. (7) Tergum 1, lateral view. (8) Genitalia. (9) Paratype male: aedeagus.

opencc-by-4.0Aug 2021View details →

Dataset for: Effects of constant versus fluctuating temperatures on fitness indicators of the aphid Dysaphis plantaginea and the parasitoid Aphidius matricariae

This is the dataset for the article entitled: Effects of constant versus fluctuating temperatures on fitness indicators of the aphid Dysaphis plantaginea and the parasitoid Aphidius matricariae. Like all organisms, insects encounter temperatures that fluctuate on different time scales: within a day, between days, or throughout the seasons. However, most studies on the impact of temperature on insect physiology, behaviour, morphology or ecology have focused on constant temperatures tested in the laboratory. In our study, we wanted to know if fluctuating temperatures during the day (7—17°C, average 12°C) can affect insects differently compared to a constant temperature of 12°C. We use as a model the apple aphid Dysaphis plantaginea, a major threat to apple orchards worldwide, and its parasitoid Aphidius matricariae, which is used in biological control. We found that many traits—but not all—were affected. In particular, the fluctuating thermal regime decreased the development time of aphids and parasitoids, improved the rate of parasitism, and tended (albeit slightly) to improve the survival of both species. In contrast, we did not find strong effects on morphological traits. Our results can be used to better predict how these agronomically important insects behave in orchards, how fluctuating temperatures affect host-parasitoid relationships, and ultimately what the implications are in the context of climate change and biological control.

opencc-by-4.0Apr 2021View details →

Dataset for: Effect of developmental temperatures on Aphidius colemani host-foraging behavior at high temperature

This is the dataset for the following study; Effect of developmental temperatures on Aphidius colemani host-foraging behavior at high temperature. We explored how three rearing temperatures (10, 20, and 28°C) affected host-foraging behaviors and associated traits under warm conditions in the insect parasitoid Aphidius colemani.

opencc-by-4.0Feb 2024View details →

Host aphid immunosuppression by Aphidius ervi venom

Dataset referred to the manuscript:  Host aphid immunosuppression by Aphidius ervi venom Elia Russo1§, Andrea Becchimanzi1,2§, Giulia Magoga1, Matteo Montagna1,2, Ilaria Di Lelio1,2* & Francesco Pennacchio1,2*   1University of Naples ‘Federico II’ - Department of Agricultural Sciences, Naples, Italy, and 2BAT Center - Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples ‘Federico II’, Naples, Italy   bstract The host immunosuppression by parasitic wasps is an important component of the host regulation strategy. The venom injected at the oviposition is one of the key-factors involved in this host alteration and, in some parasitoids, its immunosuppressive role is complemented by wasp’s symbionts. Most studies in this research area are related to hosts belonging to Lepidoptera and Diptera, for which a strong immune response is observed, whereas little is known for hemimetabolous host species, characterized by apparently much weaker defense barriers. To fill this research gap, here we focus on the host–parasitoid system Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae) – Aphidius ervi Haliday (Hymenoptera: Braconidae). We functionally characterized a serine protease homolog (AeSPH) protein in vivo, identified in the venom of the aphid endoparasitoid A. ervi, generating AeSPH-depleted female wasps by RNA interference and evaluating their capacity to successfully parasitize the host. Parasitism success rate was negatively affected by AeSPH knockdown and associated with an increased phenoloxidase (PO) cascade activation in aphids, scored by measuring PO enzymatic activity and the expression of phenoloxidase activating factor 2, a proPO-activating gene upregulated in response to A. ervi parasitism. Our results indicate that AeSPH contributes to parasitism success by inhibiting the melanization response of the host, which is therefore an important component of the defense barriers involved in the parasitoid egg suppression. The undergoing studies on other virulence factors in A. ervi venom will allow to further characterize the immunosuppression strategy and its possible broader role in the host regulation through its action on aphid symbiont development.

opencc-by-4.0Mar 2024View details →

Aphidius ervi venom regulates Buchnera contribution to host nutritional suitability

Dataset referred to the manuscript "Aphidius ervi venom regulates Buchnera contribution to host nutritional suitability" by  <a href="../search?q=metadata.creators.person_or_org.name%3A%22Russo,+Elia%22">Russo, Elia1 </a><a href="../search?q=metadata.creators.person_or_org.name%3A%22Di+Lelio,+Ilaria%22">Di Lelio, Ilaria2 </a><a href="../search?q=metadata.creators.person_or_org.name%3A%22Shi,+Min%22">Shi, Min3 </a><a href="../search?q=metadata.creators.person_or_org.name%3A%22Becchimanzi,+Andrea%22">Becchimanzi, Andrea2 </a><a href="../search?q=metadata.creators.person_or_org.name%3A%22Pennacchio,+Francesco%22">Pennacchio, Francesco2</a> Abstract: The association between the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Aphididae), and the endophagous parasitoid wasp Aphidius ervi Haliday (Hymenoptera: Braconidae) offers a unique model system for studying the molecular mechanisms underlying the complex interactions between the parasitoid, its host and the associated primary symbiont. Here, we investigate in vivo the functional role of the most abundant component of A. ervi venom, Ae-γ-glutamyl transpeptidase (Ae-γ-GT), which is known to induce host castration. Microinjections of double-stranded RNA into A. ervi pupae stably knocked down Ae-γ-GT1 and Ae-γ-GT2 paralogue genes in newly emerged females. These females were used to score the phenotypic changes both in parasitized hosts and in the parasitoid's progeny, as affected by a venom blend lacking Ae-γ-GT. Ae-γ-GT gene silencing enhanced growth both of host and parasitoid, supported by a higher load of the primary bacterial symbiont Buchnera aphidicola. Emerging adults showed a reduced survival and fecundity, suggesting a trade-off with body size. This demonstrates in vivo the primary role of Ae-γ-GT in host ovary degeneration and suggests that this protein counterbalances the proliferation of Buchnera likely triggered by other venom components. Our study provides a new approach to unravelling the complexity of aphid parasitoid venom in vivo, and sheds light on a novel role for Ae-γ-GT in host regulation.

Figure 10 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 10. Genitalia of female Aphidius funebris Mackauer, 1961.

Figure 6 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 6. Labial palps of female Aphidius transcaspicus Telenga, 1958.

Figure 5 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 5. Maxillary and labial palps of female Aphidius transcaspicus Telenga, 1958.

Figure 3 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 3. Lateral aspect of tergite 1 of female Aphidius matricariae Haliday, 1834.

Figure 2 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 2. Lateral aspect of tergite 1 of female Aphidius transcaspicus Telenga, 1958.

Figure 1 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 1. Lateral aspect of tergite 1 of female Aphidius ervi Haliday, 1834.

Figure 9 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 9. Maxillary palp of female Aphidius matricariae Haliday, 1834.

Figure 4 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 4. Maxillary and labial palps of female Aphidius colemani Viereck, 1912.

Figures 7, 8 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figures 7, 8. Maxillary and labial palps of female Aphidius matricariae Haliday, 1834.

Figure 27 in A review of the genus Aphidius Nees in Greece (Hymenoptera: Braconidae: Aphidiinae) with the description of a new species

Figure 27. Mt Tymphi, western Greece.