Biological characterization of the colombian isolate Heterorhabditis sp. SL0708 (Rhabditida: Heterorhabditidae - doi: 10.4025/actascibiolsci.v35i3.16034
DOI:
https://doi.org/10.4025/actascibiolsci.v35i3.16034Keywords:
entomopathogenic nematodes, infective juvenile, penetration, Heterorhabditidae, virulenceAbstract
Heterorhabditis sp SL0708 (Rhabditida: Heterorhabditidae) is a native entomopathogenic nematode from Alcalá, Valle del Cauca (Colombia), a natural enemy of insects that can be used for controlling Plutella xylostella L, Conotrachelus psidii Marshall and Delia platura (Meigen); however its biological characterization is unknown. In order to know about the infective capacity of the isolate, tests were made with last instar larvae of Galleria mellonella (Lepidoptera: Pyrallidae) on penetration, one by one, exposure time, dose response and foraging strategy. The average infecting juveniles (IJ) entering larvae was 3 (1.5%). In the one-on-one test, larvae mortality ranged between 8.3 and 16.7%. There was no significant difference (p < 0.05) between treatments and in number of dead larvae in the exposure time and dose response assays. Heterorhabditis sp. SL0708 presented a cruiser foraging strategy, which indicates that it can be used for sessile or cryptic hosts.
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