107 



199. ; McLaughlin, R. E.; and Hardee, D. D. 1967. Development of the bait 

 principle for boll weevil control: cottonseed oil, a source of attrac- 

 tants and feeding stimulants for the boll we=>vil. J. Econ. Entomol. 

 60: 321-325. 

 Boll weevil, Anthonotr-.i'; grand i s Boheman, made almost as many feeding punctures 

 in agar plugs treated with crude cottonseed oil as in those treated with a water 

 extract of cotton squares (flower buds). In a field-cage experiment, almost 8C% 

 of the adult weevil population v/as attracted to and fed on a pastelike bait 

 formulation containing 16% crude cottonseed oil that was applied to vigorously 

 growing cotton plants at a rate of 6-13 gallon per acre. The addition or 

 deletion of a water extract of squares did not produce a detectable difference 

 in the percentage of weevils feeding on the bait. Therefore, crude cottonseed 

 oil is a nearly limitless and inexpensive source of both feeding stimulants 

 and attractants for the boll v;eevil and can be used to form an effective 

 bait that should provide a new method of control. 



200. Davich, T. B. 1969. Sterile male-technique for control of eradication 

 of the boll weevil, Anthonomus grandis Boh. In Sterile Male Technique 

 for Eradication or Control of Harmful Insects; Proceedings, pp. 65-72. 

 International Atomic Energy Agency, Vienna. 

 Sterile-male technique for control or eradication of the boll weevil, Anthonomus 

 grandis Boh. Results of several field experiments to study the steril'^-male 

 technique for eradicating the boll weevil, Anthonomus grandis Boh., are reported, 

 The weevils were sterilized by dipping the adults in a solution of apholate. 

 Although eradication was not achieved in any tests, definite population sup- 

 pression was obtained, indicating that the sterile-male technique is applicable 

 for boll weevil eradication. One experiment utilizing gamma-radiation for 

 sterilization is described. 



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