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Chinese Journal of Applied Ecology ›› 1990, Vol. 1 ›› Issue (3): 225-230.

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A research method of using 'insect (or mite) days' for establishing time dynamic EIL

Qin Yuchuan, Cai Ninghua   

  1. Department of Plant Protection, Beijing Agricultural University, Beijing 100094
  • Received:1989-06-27 Online:1990-07-25 Published:1990-07-25

Abstract: With european red mite (Panonychus ulmi) as an example, the author inquired into the method of using 'insect (or mite) days' for establishing time dynamic EIL. It is consi dered that firstly, the EILfrom 'insect (or mite) days' contained the fundamental information of insect or mite injury; Secondly, 'insect (or mite) days' EILis a time dynamic one, not belonging to an one-time EIL; Thirdly, the modelling needs rot consider the survival rate of injurious insect or mite.

Key words: Insect (or mite) days, Time dynamic, EIL, Survival rate