V. Kerguelen

Learn More
A novel technique for the simultaneous monitoring of electroan-tennogram (EAG) and conditioned proboscis extension (CPE) responses of honey bees to the effluent from a gas chromatograph (GC) was developed to locate biologically active components in blends of plant volatiles and to investigate odor recognition at the peripheral and behavioral levels. A(More)
Through a single oviposition experience on their natural host in presence of vanilla odor, femaleBrachymeria intermedia were induced to drum and drill in a vanilla-scented artificial host. We examined which behaviors in the oviposition sequence mediated this conditioning: conditioning was most successful when odor exposure coincided with oviposition. Wasps(More)
Through a single oviposition experience in the presence of vanilla odor, female Brachymeria intermedia were conditioned to fly toward a source of vanilla odor in a wind tunnel. Conditioning was an associative process, and wasps were able to fly toward odor sources at much lower doses than the dose used in conditioning. Furthermore, upon approaching(More)
The impact of genetically modified oilseed rape (Brassica napus L.) on the foraging behaviour of honey bees (Apis mellifera L.) was evaluated on two different lines transformed to express constitutively heterologous chitinase in somatic tissue for enhanced disease resistance. Experiments were conducted in confinement in an indoor flight room with controlled(More)
We compared the susceptibility of seven cultivars of avocado, Persea americana, to feeding by Oligonychus perseae. Based on the percentage of leaf area damaged by mites in February 1998, cultivars were categorized into three groups: Hass and Gwen were `susceptible', Fuerte, Lamb Hass and Reed were `resistant', Esther, and Pinkerton were of `intermediate'(More)
  • 1