Susceptibility of Scolytus multistriatus to Neoaplectanid and Heterorhabditid Nematodes

Abstract
Larvae, pupae and adults of the smaller elm bark beetle, Scolytus multistriatus were infected and killed by the entomogenous nematodes, Neoaplectana carpocapsae Weiser and Heterorhabditis bacteriophora . The nematodes multiplied within the host cadavers and began leaving parasitized beetle larvae 14 days after initial infection. Each beetle larva produced an average of 4, 131 and 4,238 infective stages of N. carpocapsae and H. bacteriophora , respectively. This is equivalent to one mg of host larva tissue producing approximately 1,620–1,660 infective stage juveniles of N. carpocapsae and H. bacteriophora .