Abstract
Following antennal contact with the honeydew of the black scale (Saissetia oleae Olivier), female adult green lacewings (Chrysoperla carnea Stephens) showed a reduced mean walking speed (inverse orthokinesis), an increased mean turning frequency (positive klinokinesis), and an increased mean turning angle. Similar, but generally less pronounced, behavioural changes occurred after contact with solutions of acid hydrolysed L-tryptophan and water. Reduced walking speed, lower mean turning frequency and increased mean turning angle were also observed in insects exposed to honeydew during the period prior to antennal contact with the honeydew. The observed alterations in behaviour in response to honeydew could increase the likelihood of both honeydew and prey being located in the field.
Résumé
A la suite d'un contact antennaire avec le miellat de la cochenille noire (Saissetia oleae), les femelles adultes deChrysoperla carnea Stephens présentent une vitesse de déplacement moyenne réduite (orthokinèse inverse), une fréquence de changement de direction moyenne accrue (klinokinèse positive), et une augmentation de l'angle de changement de direction moyen. De manière similaire mais généralement moins accentuée, des changements de comportement se manifestent après contact avec des solutions de L-triptophane hydrolysé en milieu acide. Une vitesse de déplacement réduite, une fréquence moyenne de changement de direction plus faible et un angle de changement de direction moyen en augmentation sont également observés chez les insectes exposés au miellat durant la période précédant un contact antennaire avec le miellat. Les altérations de comportement observées en réponse au miellat pourrait allonger la vie à la fois du miellat et de la proie dans la nature.
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McEwen, P.K., Clow, S., Jervis, M.A. et al. Alteration in searching behaviour of adult female green lacewingsChrysoperla carnea (Neur.: Chrysopidae) following contact with honeydew of the black scaleSaissetia oleae (Hom.: Coccidae) and solutions containing acidhydrolysed L-tryptophan. Entomophaga 38, 347–354 (1993). https://doi.org/10.1007/BF02374452
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DOI: https://doi.org/10.1007/BF02374452