The present paper deals with the influence of temperature and relative humidity on the development, survial and reproduction of T. theophilae at six constant temperatures from 18 to 30癈 and five relative humidities from 50 to 90%.The temperature had a significant effect on the development and progeny numbers produced in the first day$ but the effects of relative humidity (RH) were not significant. The relationship between development rates and temperatures fitted the logistic cure; the developmental thresho...