Researches on Population Ecology

, Volume 15, Issue 2, pp 9–22 | Cite as

A preliminary model to simulate the effect of insecticides on a spider-leafhopper system in the paddy field

  • Takafumi Sasaba
  • Keizi Kiritani
  • Tatsuo Urabe


On the basis of life-table studies of the green rice leafhopper,Nephotettix cincticeps Uhler, a descriptive model was constructed to simulate the life system of leafhoppers in the paddy field.

Computer simulation demonstrated the existence of an optimum ratio of predators to prey in utilization of spiders for the control of leafhoppers. Also the population density ofLycosa which prey upon leafhoppers appears to determine the feasibility of controlling leafhoppers with reduced number of applications of selective insecticides. The increase of leafhoppers after application of non-selective insecticides was also simulated by the proposed model.


Paddy Field Instar Nymph Rice Dwarf Virus Rice Pest Rice Stem Borer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© The Society of Population Ecology 1973

Authors and Affiliations

  • Takafumi Sasaba
    • 1
  • Keizi Kiritani
    • 1
  • Tatsuo Urabe
    • 2
  1. 1.Division of EntomologyPrefectural Institute of Agricultural and Forest Science, InoKochiJapan
  2. 2.Department of Earth SciencesNagoya UniversityNagoyaJapan

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