245 



come within the vicinity of cages containing virgin females of the same species 

 (or extractH containing pheromones of these females). This behavior has been 

 demonstrated for such insects as the gypsy moth [ Porthetri.i dlspar (L.)], 

 Euporean pinv! sawfly [ Neodiprion sertifer (Ceoffroy)], cabbage looper [ Trlchop- 

 lusia ni (Hubner)], tobacco hornworm [ Manduca sexta (Johannson) ) , codling moth 

 [ Carpocapsa /lomonella (L.)l, pink bollworm [ Pectinopl'.ora possypiella (Saunders)], 

 tobacco budworm [ Heliothis vlrescens (F.)], peach tree borer [ Sannlnoidea 

 exitiosa (Say)], spotted cucumber beetle ( Diabrotica undecimpunctala howardi 

 Barber), and others. Procedures similar to those outlined for the boll wef"-''' 

 and codling noth could undoubtedly have a major impact on the reproductive 

 potential of lew-levei populations of many species if suitable techniques 

 were developed. Jacobson (1965) recently compiled the information available 

 pertaining to insect sex attractants. He listed a wide range of insects that 

 produce pheromones to attract one sex or the other. Research to identify, 

 determine the chemical structures of, and eventually synthesize these attrac- 

 tants should be emphasized. Considerable effort xs being devoted to such investi- 

 gations by personnel of the Entomology Research Division and members of other 

 research groups. It is obvious that a synthetic attractant equal in activity 

 to the natural attractant, if available in large quantity, and at low cost per 

 unit of attractant power, would offer advantages that the living insects, or 

 their equivalent in extracts, would not have. Therefore, research to synthe- 

 size sex attractants of all key insect species should be given the highest 

 priority. 



474. . 1966. Some basic principles in insect population suppression. Bull. 



Entomol. Soc. Am. 12: 7-15. 

 The basic principles of insect population suppression and how these principles 

 can be applied alone or properly integrated in the topic I wish to discuss with 

 you o^ this occasion. I am confident that with new techniques of control and 



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