Entomogenous nematode research in China.
Research and field trials carried out in China on entomophilic nematodes are reviewed. These include: control of mermithid infections in the oak silkworm [Antheraea pernyi] with fenamiphos; the use of Amphimermis elegans and Hexamermis microamphidis to control Parasa consocia and other insect pests in orchards; the use of Hexamermis sp. to control the armyworm [Mythimna separata]; of Amphimermis sp. and Agamermis unka to control the brown planthopper [Nilaparvata lugens]; of Isomermis sp. to control Culex tritaeniorhynchus (a vector of epidemic encephalitis B and filariasis); and of Romanomermis jindeensis to control Anopheles sinensis and other mosquito species. Work with Steinernematidae and Heterorhabditidae introduced into China and with indigenous Steinernema and Heterorhabditis species is also in progress. It includes investigations of mass culture techniques, of host range, resistance to chemicals and safety for vertebrates, and the utilization of these nematodes for controlling the peach fruit moth [Carposina niponensis] (a pest of apple, pear and jute in China), the sugarcane beetle [Alissonotum impressicolle], M. separata, the cabbageworm [Pieris rapae] and the mango branch borer [Rhytidodera bowringi].