Survival and pathogenicity of two entomopathogenic nematodes, Steinernema carpocapsae (=Neoaplectana) and Steinernema glaseri, were tested in four types of soil: sand, sandy loam, clay loam, and clay over a period of 16 weeks. Significant differences in the survival and pathogenicity of both nematodes occurred in all soil types. S. carpocapsae survival was 44.9, 38.8, 32.9, and 26.7% in sandy loam, sand, clay loam, and clay, respectively, whereas S. glaseri survival was 30.1, 25.9, 22.5, and 19.3% in sand, sandy loam, clay loam, and clay, respectively, at the end of the test. S. glaseri survival was significantly lower than S. carpocapsae in all soil types. Survival for S. carpocapsae was greatest in sandy loam, while survival for S. glaseri was best in sand. Pathogenicity assays with recovered nematodes supported the survival data. Persistence of both species decreased as the proportion of clay increased.
All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Entomopathogenic nematode
- Steinernema carpocapsae
- Steinernema glaseri