The pea aphid (Acyrthosiphon pisum) has a strong sexual dimorphism with males being thinner than the females. When we used the parasitoid Aphidius ervi, we observed few attack behaviour and, for now, no mummy formation on male aphids. Are you aware of publications on parasitoid attacks on different sexual / asexual morphs of aphids?
There is no problem for Lysiphlebus testaceipes to develop on alate or apterous females. I don't know if there is a preference as I assumed that the uneven distribution was an artifact of the relative abundance of each morph in the population (but I did not test this). Never had the opportunity to test sexuals. Aphidius ervi might be different. I think it would only be a problem if the parasitoid preferred males. In terms of population growth of the aphid, only the females really matter.
Dear Kévin Tougeron
It may be the size of aphids affect the attack behavior, still aphids behavior in relation with parasite need more works. during some experiment on 5 aphids spp. in the field also, after parafilm feeding they were affected by different pH of the crops then behave differently, the most reaction noticed the quick wings formation and shortened in lifecycle
Pls. find the attached files
http://advances.sciencemag.org/content/2/9/e1600606.full
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4664394/
http://link.springer.com/article/10.1007/s10905-006-9055-y
http://www.nature.com/nature/journal/v388/n6639/full/388269a0.html
http://www.toek.wzw.tum.de/fileadmin/1_Datein/PDF_Publikationen/2002-01.pdf
http://snre.umich.edu/cardinale/wp-content/uploads/2012/04/langley_oecologia_2006.pdf
https://iees-paris.ufr918.upmc.fr/images/publi/4d749cb06d4502f84542e81735c535fc.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087678/
http://www.entomoljournal.com/archives/2016/vol4issue1/PartB/3-6-71.pdf
Hoping this will be helpful
Regards
Prof. Houda Kawas
Also
https://www.sciencedaily.com/releases/2012/02/120224110739.htm
http://www.eje.cz/artkey/eje-200805-0001_chemical_cues_mediating_aphid_location_by_natural_enemies.php
https://www.jstor.org/stable/pdf/4602064.pdf?seq=1#page_scan_tab_contents
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1664631/
http://onlinelibrary.wiley.com/doi/10.1111/j.1570-7458.2005.00318.x/full
http://onlinelibrary.wiley.com/doi/10.1002/dev.20538/abstract?systemMessage=Wiley+Online+Library+will+be+unavailable+on+Saturday+26th+November+2016+from+07%3A00-11%3A00+GMT+%2F+02%3A00-06%3A00+EST+%2F+15%3A00-19%3A00+SGT+for+essential+maintenance.++Apologies+for+the+inconvenience.&userIsAuthenticated=false&deniedAccessCustomisedMessage=
Dear Kevin Tougeron
The parasitoids have a very specific behavior towards their hosts so it is better to examine the behavior of the parasitoid towards the different stages of pea aphids and then you can detect if it can develop or not on the male pea aphid. Best Regards.
Aly Younes
This is what I am doing right now. I was just surprised that there was no information in the litterature on this subject yet.
Dear Kévin,
I have no personnel information on interaction between A. pisum and parasitoids but I know that Aphidoletes aphidimyza larvae feed voraciously on it. I remember when these larvae destroyed our A. pisum rearing.
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