CONTENTS 



Principles involved 3 



Normal trends of insect populations 3 



Trends of an insect population subjected to usual methods of control 4 



Trends of an insect population subjected to competition by 



sexually sterile insects 6 



Trends of an insect population subjected to an integrated program of 



sterile-insect releases and conventional methods of control 8 



Factors to consider in appraising the feasibility of employing sterile insects 



for population control 12 



Feasibility of producing sterility without producing serious adverse 



effects on mating competitiveness 12 



Practicability of rearing or collecting organisms for subsequent 



sterilization and release 13 



Necessity for appraising natural population density 15 



Importance of information on current losses and current control costs 



in estimating the practicability of rearing insects for release 18 



Mating behavior a factor in the use of the sterile-insect-release 



method 20 



Ecological factors 23 



Release of strains adapted to the natural environment 24 



Summary of basic requirements and factors that determine the 



feasibility of employing the sterile-insect-release technique 25 



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