Chemically-mediated attraction of three parasitoid species to mealybug-infested cassava leaves

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dc.creatorBertschy, C
dc.creatorTurlings, TCJ
dc.creatorBellotti, Anthony C.
dc.creatorDorn, S.
dc.date1997-09
dc.date2014-09-24T08:41:52Z
dc.date2014-09-24T08:41:52Z
dc.date.accessioned2026-06-27T14:44:11Z
dc.descriptionWe investigated whether cassava plants that are infested by the cassava mealybug, Phenacoccus herreni (Pseudococcidae, Sternorrhyncha), emit attractants for the encyrtid parasitoids Aenasius vexans Kerrich, Apoanagyrus (Epidinocarsis) diversicornis Howard, and Acerophagus coccois Smith. Bioassays with a Y-tube olfactometer showed for all three species that female wasps were most responsive and selective when they were 1.5 to 2.5 days old. Females of these age groups were used to test their ability to distinguish between the odor of plants with and without mealybugs. The wasps were offered choices between infested cassava leaves vs. healthy ones, infested leaves vs. clean air, and healthy leaves vs. clean air. A. vexans and A. diversicornis were strongly attracted to infested leaves and preferred these over healthy ones. In contrast, A. coccois was significantly attracted to either healthy or infested leaves, and did not distinguish between the two. The results suggest that A. coccois, which has the broadest known host range of the three, may be responsive only to general plant odors, while A. vexans and A. diversicornis respond more specifically to odors associated with mealybug infestation.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/43264
dc.identifier.urihttp://hdl.handle.net/123456789/86905
dc.languageen
dc.rightsOpen Access
dc.subjectmanihot esculenta
dc.subjectphenacoccus
dc.subjectparasitoids
dc.subjectnatural enemies
dc.subjectstimulants
dc.subjectsmell
dc.subjectparasitoides
dc.subjectenemigos naturales
dc.subjectestimulantes
dc.subjectolor
dc.titleChemically-mediated attraction of three parasitoid species to mealybug-infested cassava leaves
dc.typeJournal Article

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