253 



control measures has received special emphasis in recent years. The application 

 of insecticides as a preventive measure in advance of the appearance of economical 

 number: of certain pests is still practiced by growers to some degree. Preven- 

 tive measures may be the most logical solution for many pest problems, but this 

 approach has led to justifiable criticism in some cases because of the ecological 

 disruption caused by excessive or unnecessary applications of broad-spectrum 

 chemical insecticides. If this objectionable feature can be avoided by the use 

 of target-pest-specific methods, preventive entomology should be accorded the 

 same recognition now received in preventive medicine. Among the 3 attempting 

 approaches, the feasibility and justification for attempting eradication of 

 well-established pests from specified areas is probably the most controversial . 

 among members of the entomological community. Some of the controversy is due 

 to differences in interpretation of the meaning of eradication. Those who are 

 in general opposition to the concept of eradication also cite examples of costly 

 efforts that failed to achieve the objective. There is also wide divergence of 

 viewpoints on the capability of achieving eradication of pests with available 

 technology. 



483. , and McQuire, J. U., Jr. 1966. Population models to test the theore- 

 tical effects of sex attractants used for insect control. U.S. Dep. Agric. 

 Inf. ^ Bull. 308, 20 pp. 

 Use of models to test effects of sex attractants are described for the codling 

 moth [ Carpocapsa pomonella (L.)] and the boll weevil ( Anthonomus grandis 

 Boheman) with implications for use for other insects which respond to sex 

 attractants. 



