Publications

host-plant mediated effects of root herbivory on insect seed predators and their parasitoids.	the effects of root herbivory on a tephritid seed predator (terellia ruficauda) and its parasitoids were investigated. soil fauna were manipulated by insecticide treatment; host plant (cirsium palustre) phenology and the oviposition behaviour of both tephritid and parasitoids (pteromalus elevatus and torymus chloromerus) recorded. although insecticide-treated (and hence reduced root herbivory) plants had larger flowerheads, population abundances of both tephritids and parasitoids were greater on ...	2001	24577656
host selection behavior of a thistle-feeding fly: choices and consequences.	female canada thistle seed flies (orellia ruficauda) preferentially oviposit into seed heads which are a single day from opening. when flies are forced to oviposit into flower heads at other stages of development, offspring typically do slightly poorer: they attain a mature mass of about 15% less than do larvae derived from preferred hosts. larval mass correlates strongly with reproductive success: heavy larvae develop into adults that produce eggs at a faster rate than do those developing from ...	1992	28313573