Citation:

S Miyai, K Kiritani, T Sasaba. 1978. An empirical model of Lycosa-hoppers interaction system in the paddy field. Protection Ecology 1: 9-21.

Keywords: by means of vector analysis, an empirical model of a predator-prey system was developed. The population dynamics of the green leafhopper Nephotettix cincticeps is regulated by spiders such as the wolf spider Lycosa (=Pardosa) in Japan. Insecticide applications kill both the predator and prey. If a moderate degree of resistance based on breeding new varieties of rice resistant to leafhoppers is achieved then the pest would be brought below the economic injury level