Field evaluations of Bacillus thuringiensis Berliner serotype 14 and the nematode Steinernema feltiae Filipjev 1934 (=Neoaplectana carpocapsae) were conducted against Simulium ocharaceum Walker and other simuliid vectors of onchocerciasis in Mexico. B. thuringiensis was highly toxic, causing up to 100 % larval mortality, but only for short distances downstream. Increased dosage did not enhance downstream carry of B. thuringiensis. Highest rates of mortality were recorded against early instar larvae. Stream treatment with S. feltiae did not result in significant larval mortality because the infectivestage nematodes were either not ingested or were injured during ingestion by the larval mouthparts.
All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Agricultural and Biological Sciences(all)
- Plant Science