Intraguild Predation and Biosafety of Entomopathogenic Nematode,?Heterorhabditis bacteriophora?Poinar et Al., and its Bacterial Symbiont,?Photorhabdus luminescens, to Parasitoid,?Trichogramma chilonis?Ishii and Predator?Chrysoperla zastrowi sillemi?(Esben

摘要

Intraguild predation (IGP) appears to be pervasive among communities of biocontrol agents associated with nematode sharing the host with trophic interaction. Entomopathogenic nematode (Heterorhabditis bacteriophora) and its associated bacterium (Photorhabdus luminescens); an egg parasitiod,?Trichogramma chilonis?and a predator?Chrysoperla zastrowi sillemi?were selected for present study. There was no adverse effect of?H. bacteriophora?and?P. luminescens?observed on adult emergence of?T. chilonis.?Microscopic examination of eggs, larvae and adults of?T. chilonis?and C. z. sillemi treated with?H. bacteriophora,?P. luminescens?and cell-free culture filtrates of P.?luminescens, exhibited no deformity, discoloration or infection of organisms. Similarly, H. bacteriophora,?P. luminescens?or the cell-free culture filtrates exhibited no adverse activity on egg hatching or larvae of?C. z. sillemi?indicating that there was no intraguild competition under artificial epiphytotic conditions between the organisms under report, viz.,?H. bacteriophora, its associated bacterium (P. luminescens),?T. chilonis?and?C. z. sillemi.