Rate summation effect on mean daily development rates in development process of insect

Abstract

Abstract: The relationship between temperature and development rate of insect follows a sigmoidcurve.This paper describes the ranges of varying temperatures favourable to insect development, and presents a simulation study on the effect of rate summation which is a directconsequence of curvilinear relationship between temperature and development rate.Thesimulation is based on the development data of Lipaphis erysimi.The results show thatunder the prerequisite of not considering the effect of temperature variation on instantaneous rate of development, the rate summation effect will lead to a faster development atvarying temperatures than that at a constant temperature within the range of low temperature.Areverse consequence is resulted within the range of high temperature, and thedifference increases rapidly with the amplitude of temperature variation.Because meandaily development rate varies with the pattern and amplitude of temperature variation,and the development under different varying temperatures can be predicted by the constant temperature rate curve, it's suggested that in terms of making prediction of insectdevelopment under favourable temperatures, the experimental data obtained under constant temperatures have a wider application than those obtained under varying temperature regimes.

Key words: Insect, Rate summation effect, Varying temperature, Development rate

Liu Shusheng . Rate summation effect on mean daily development rates in development process of insect[J]. Chinese Journal of Applied Ecology, 1995, 6(1): 61-66.

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