302 



In the amount ingested compared with the standard unfortified formulation. 

 However, there were no significant differences among the acids tested. 



586. ; Hedin, P. A.; McGovern, W. L.; Wilson, N. M.; and Mitchell, E. B. 

 1977. A sex pheromone for male boll weevils from females. J. Chem. 

 Ecol. 3: 331-335. 



Steam distillation of frass of the female boll weevil, Anthonomus grand is 

 Boheman, yielded an extract that was more attractive to males than to fe- 

 males in the laboratory. Extracts purified by TLC were attractive to 

 males oi&ly. The active components appear to be alcohols and hydrocarbons. 



587. ; Hedin, P. A.; McLaughlin, R. E.; and Davich, T. B. 1971. Development 

 of the bait principle for control of boll weevils: addition of terpenoids 

 and related plant constituents. J. Econ. Entomol. 64: 1493-1A95. 



In laboratory bioassays, several candidate attractants incorporated into a 

 cottonseed oil bait increased the olfactory response of Anthonomu ""^ grandis 

 Boheman 10- to 16-fold over the response to the standard unfortified bait. 

 Also, in a 1/2-acre field-cage test, a mixture of N-borncol, rose oxide, 

 a-pinene, and linalool oxide bait added to cofLtonseed oil bait that contained 

 dy^^for^a-niarker increased the response of weevils 48% before mid-September. 

 After that period, none of the attractants elicited an increase in response. 



588. , and Johnson, W. L. 1976. The use of exponential and linear decay 

 models in the evaluation of controlled-release pheromone formulations. 

 Bull. Entomol. Soc. Am. 22: 323-325. 



A regression analysis and resulting model can provide the data needed in testing 

 pheromone formulations, and the procedure is not difficult. A mathematical 

 model is simply a formula that 'describes some phenomenon, for example, the 

 release of a volatile pheromone or the numbers of insects captured as a function 

 of time. However, an analysis involving decay models (models that show change 



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