The State Museum, State Library and State Archives are temporarily Closed.

Instar Susceptibility of Simulium vittatum (Diptera: Simuliidae) to the Entomogenous Nematode, Neoaplectana carpocapsae

TitleInstar Susceptibility of Simulium vittatum (Diptera: Simuliidae) to the Entomogenous Nematode, Neoaplectana carpocapsae
Publication TypeJournal Article
Year of Publication1981
AuthorsGaugler, RR, Molloy, DP
JournalJournal of Nematology
Volume13
Pagination1-5
Keywordsbiology
Abstract

Laboratory bioassays showed that the susceptibility of Simulium vittatum to Neoaplectana carpocapsae increased with successive larval instars. First, second, and third instar larvae were resistant to infection, while seventh instars were highly susceptible. Significant differences in intra-instar susceptibility were also evident, as mortality ranged from 58% for the smallest seventh instar larvae to 97% for the largest. Dissections revealed that the basis for the resistance of early instars was physical exclusion of the comparatively large nematodes. The principle factor regulating the susceptibility of mid and late instars was injury to nematodes caused by larval mouthparts during ingestion. Differences in intra-instar susceptibility were similarly related to nematode injury.

URLhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2618041/pdf/1.pdf