Recently, Negrisoli et al. (2010) demonstrated that entomopathogenic nematodes including Heterorhabditis indica, Steinernema carpocapsae and Steinernema glaseri were found to be compatible with many insecticides including chlorpyrifos, deltamethrin, lufenuron, deltramethrin + triazophos, diflubenzuron, gamacyhalothrin, lambdacyhalothrin, spinosad, cypermethrin, triflumuron, and permethrin under laboratory conditions. Read following paper for more information compatibility of entomopathogenic nematodes with insecticides.
Negrisoli, A.S., Garcia, M.S., Negrisoli, C.R.C.B. 2010. Compatibility of entomopathogenic nematodes (Nematoda: Rhabditida) with registered insecticides for Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) under laboratory conditions. Crop Protection 29: 545-549.