Suchergebnisse

Parasites of Apanteles militaris (Hymenoptera: Braconidae), a larval parasite of Mythimna unipuncta (Lepidoptera: Noctuidae), were first found in São Miguel (Azores) in 1989. In 1990 annual surveys of those hyperparasites were initiated in order to study their distribution throughout the year. During the first two years, Lisibia sp. was found at two different altitudes. However, Trichomalopsis sp. was only identified at the highest altitude. Two years after the identification of these two genera, a third hyperparasitoid (Gelis sp.) was found at both altitudes.

During a scientific expedition carried out in Madeira Island in September 1997, Pseudaletia (=Mythimna) unipuncta (Lepidoptera: Noctuidae) larvae were collected in maize fields and pastures. These larvae were parasitized by a braconid belonging to Glyptapanteles genus. This population was characterised biochemically to identify the species. Seven enzyme systems studied by electrophoresis were analysed: aldehyde oxidase (AO), aglycerophosphate dehydrogenase (a-GPD), tetrazolium oxidase (TO), malate dehydrogenase (MDH), glucose-6-dehydrogenase (G6PD), malic enzyme (ME), isocitrate dehydrogenase (IDH). All systems showed only one band, with two exceptions: a-GPD and ME which had two bands which corresponded to different loci. No polymorphic enzymes were detected. Comparing this results with those obtained from G. militaris collected in Azores Islands and in Quebec-Canada we can suggest that the population of Glyptapanteles collected in Madeira Island belongs to G. militaris species.

III Simpósio Fauna e Flora das Ilhas Atlânticas / Symposium Fauna and Flora of the Atlantic Islands, Universidade dos Açores, Ponta Delgada (Açores), 21 - 25 September, 1998. ; During the Scientific Expedition effectuated in Madeira Island in September 1997, Pseudaletia (Mythimna) unipuncta (Lepidoptera: Noctuidae) larvae were collected in maize fields and pastures. These larvae were parasilized by a braconid belonging to Glyptapanteles genus. This population was characterised biochemically to identify the species. Seven enzyme systems studied by electrophoresis were analysed: aldehyde oxidase (AO), aglycerophosphate dehydrogenase (a-GPO), tetrazolium oxidase (TO), malate dehydrogenase (MOH), glucose-6-dehydrogenase (G6PO), malic enzyme (ME), isocitrate dehydrogenase (IOH). All systems presented only one band, with two exceptions: a-GPO and ME with two bands which corresponded to different locus. No polimorphic enzymes were detected. Comparing this result s with those obtained from G. militaris collected in Azores Islands and in Quebec-Canada we cau suggest that the population of Glyptapanteles collected in Madeira Island belongs to G. militaris species.