Recently, McGraw et al (2010) demonstrated that field application of three species of entomopathogenic nematodes (Steinernema carpocapsae, S. feltiae and Heterorhabditis bacteriophora) at rate of 2.5 billion nematodes/hectare reduced over 69% population of first generation late instars of the annual bluegrass weevil, Listronotus maculicollis. For more information on the interaction between entomopathogenic nematodes and the annual bluegrass weevil read following literature.
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McGraw, B.A. and Koppenhofer A.M. 2008. Evaluation of two endemic and five commercial entomopathogenic nematode species (Rhabditida : Heterorhabditidae and Steinernematidae) against annual bluegrass weevil (Coleoptera : Curculionidae) larvae and adults. Biological Control. 46: 467-475.
McGraw, B.A. and Koppenhofer A.M. 2009. Population dynamics and interactions between endemic entomopathogenic nematodes and annual bluegrass weevil populations in golf course turfgrass. Applied Soil Ecology. 41: 77-89.
McGraw, B.A., Vittum, P.J., Cowles, R.S. and Koppenhofer A.M. 2010. Field evaluation of entomopathogenic nematodes for the biological control of the annual bluegrass weevil, Listronotus maculicollis (Coleoptera: Curculionidae), in golf course turfgrass. Biocontrol Science and Technology. 20: 149-163.