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A synthetically prepared boll weevil sex attra.tant, two natural plant attractants, 

 and aq Insect repellent have been formulated so as to include certain glycols 

 and/or derivatives thereof. These formulations, in the form of attractant- 

 containing pellets have been successfully employed to trap c.v<^ destroy he'll 

 weevils for periods up to one week. Because these new formulations are designed 

 to release the active ingredients at controllable rates the effectiveness of the 

 active ingredients is sustained for longer periods of time than those attained 

 in the prior art. 



581. ; Hardee, D. D.; Davich, T. B.; Gueldner, R. C; and Hedin, P. A. 

 1971. Slow-release formulations of grandlure, the synthetic pheromone 

 of the boll weevil. J. Econ. Entomol. 64: 317-319. 



Results of field tests with grandlure, the pheromone of the boll weevil, 

 Anthonomus grandis Boheman, showed it to be a potent attractant, though 

 preliminary work by Hardee has shown it to have a very short residual life. 

 We therefore needed to find a way to extend its activity. \Vhitlaw and Evans 

 screened plastic and resin materials as slow-release agents for mosquito 

 larvicides and reported that polyamide and other resins extended activity. 

 We tested these and other selected materials at the Boll VJeevil Research 

 Laboratory at State College, Miss., to find a sustained, slow-release 

 preparation in a form that could be used in the field. 



582. . 1976. Composition for attracting the boll weevil. U.S. Patent 

 No. 3,954,968. 



A synthetically prepared boll v;eevil attractant has been formulated so as to 

 include crude cottonseed oil. This forraulatlonv in.the form of a gelled emul- 

 sion, has been used to trap and destroy boll weevils for periods up to 2 weeks. 

 The uew formulation releases the active ingredients at a more favorable rate 

 and Is effective for longer periods than previously developed ones. 



