Dec 26, 2022
some bugs i saw at work 18.V.2022 - 31.V.2022
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some bugs i saw at work 18.V.2022 - 31.V.2022
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recently my brainspace has been invaded by a colony of woolly aphids. look at them! fluffy bug! how cool! I know it's technically, like, wax, but still! and their wings are so pretty. this picture I like especially because they kind of have a rainbow shimmer. so pretty. so magical. little fluffy fairies fr
I've been reading some articles about aphids recently. apparently there's some confusion regarding their taxonomy. It's very confusing for someone as new as me but it's still so cool to learn about.
photo isn't mine, definitely one of my favorites tho. the credits are in the bottom right corner :]
Woolly alder aphid (Prociphilus tessellatus) , Newark, DE. December 2016. A species of aphid that is obvious in the winter due to the fact that they tend to cluster and that they have white, waxy masses found on their abdomen, giving them the moniker of ‘woolly aphid’. Although they cluster in large groups, they are unlikely to cause damage to the trees they feed on, of which silver maple and alder trees are their preferred host. These aphids have a complicated life cycle, which involves a wingless form that is mostly immobile, feeding on the vascular tissue (phloem) of trees. These individuals are all female, and are able to asexually reproduce without fertilization ( a form of parthenogenesis) and give birth to live clones of themselves. In early summer, a second morph is produced that includes winged males and egg-laying females, capable of sexual reproduction. These aphids disperse from their host plant and search for suitable mates.Â
Le puceron, ou aphidae, est une petite peste (approximativement 2 mm) bien connue des agriculteurs et des jardiniers. Ce sont des ravageurs, qui sucent la sève des plantes; on cherche donc habituellement à savoir comment les illiminer et non pas comment ils se reproduisent. C'est pourtant ce que je vais aborder ici!
L'hiver, il n'y a pas de puceron (pas trop de surpises ici), cependant leurs oeufs, eux, hivernent et aux printempt les premiers pucerons écolsent, près à bousiller la flore avoisinante!
Il y a plusieurs formes de pucerons. Un peu comme chez les fourmis, des individus de morphologies et de fonctions diverses naissent. Il y a les mâles et femelles ailées, qui vont eux-mêmes s'accoupler et pondre des oeufs. Il y a aussi des pucerons qui ne maturent pas (ils restent au stade de nymphe) et ne se reproduisent pas. Mais, il existe également des femmelles aptères (sans ailes) qu'on appellent "fondatrices" et c'est là que ça devient franchement bizarre.
Ces pucerons (puceronnes? 🙃) se reproduisent par parthogénèse. Sans aucune fertilisation extérieure, elles se clonent. Elles ne pondent pas d'oeufs: l'éclosion à lieu dans le corps de l'insecte, qui donne ensuite naissance à de jeunes nymphes déjà toutes formées et autonomes. Certains de ces rejetons sont même parfois déjà gestantes!!! Bébé a déjà un bébé! La nature est terrifiante... 🥹
Ces mères fondatrices sont la clef de voûte de cette prolifération expotentielle que vous avez peut-être vous-même déjà observé sur vos plantes.
Et maintenant, vous le savez aussi!
P.S.: Il existe aux alentours de 4000 espèces de pucerons. Je brosse un portrait généralisé, mais chaque espèce a ses particularités!
Pour aller plus loin:
https://www.universalis.fr/encyclopedie/puceron-aphide/
https://www.iriisphytoprotection.qc.ca/Fiche/Insecte?imageId=8777
https://animaldiversity.org/accounts/Aphididae/
https://www.britannica.com/animal/aphid
(Macrosiphum euphorbiae x2, Macrosiphum rosae, Hyalopterus pruni) An Aphidae evening! My iNaturalist 📸: Nikon COOLPIX P100
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Project 365 - The Day 2011-07-06
A Clematis "Warszawska Nike", the first flowers open, aphids have also noticed the delicate flower buds, Viertola, Vantaa