| larvae and nests of six aculeate hymenoptera (hymenoptera: aculeata) nesting in reed galls induced by lipara spp. (diptera: chloropidae) with a review of species recorded. | wetland species of aculeate hymenoptera are poorly known, even though many of them may serve as diagnostic or flagship species in nature conservation. here we examined 6,018 galls induced ≥1 year prior their collection by the chloropid flies lipara spp. the galls were collected at 34 sites in central europe. we examined 1,389 nests (4,513 individuals) of nine species, part of which were parasitized by one dipteran and two chrysidid parasitoid species. we describe the nests of seven dominant spec ... | 2015 | 26114290 |
| plant stress and larval performance of a dipterous gall former. | according to the plant vigour hypothesis, galling insects should respond positively and perform better on vigorous plants or plant parts, the opposite of the predictions of the plant stress hypothesis. i carried out field experiments to analyse the effects of sustained abiotic stress on the interactions between the common reed (phragmites australis) and a gall-forming fly (lipara lucens). the reed shoot diameter (a measure of plant vigour) is strongly affected by environmental conditions, where ... | 1995 | 28306960 |