347 



681. ; Hopkins, A. R. ; Taft, H. M. ; and Anderson, L. L. 1967. Fatty acids 

 in total lipid extracts of insecticide-treated boll weevils that sur- 

 vived or died. J. Econ. Entomol. 60: 64-63. 



Boll weevils, Anthonomus grandls Boheman, from field collections or reared in 

 the laboratory were treated topically or by a dry-film technique with toxa- 

 phene, toxaphene + DDT, carbaryl, or azinphosmethyl. Total lipids were ex- 

 tracted from weevils that survived and died from this treatment and the fatty 

 acids in the extracts were determined. Analysis of the fatty acids with gas- 

 liquid chromatography indicated significantly higher levels of stearic, 

 llnoleic, and linolenic acids in dead weevils and higher levels of palmitic 

 and oleic acids in the survivors. 



682. ; Leopold, R. A.; and Taft, H. M. 1978. Boll weevils: mechanism of 

 transfer of diflubenzuron from male to female. J. Econ. Entomol. 71: 

 587-590. 



Data show that is unlikely that copulation is the mechanism by which diflubenzuron 

 is transferred from male to female boll weeviis, Anthonomus grandis Boheman. 

 Males treated by feeding on diets containing diflubenzuron were unable to 

 transfer sufficient amounts to affect the lietch of eggs fiom untreated females. 

 %»Uidie£^with 14-C-labeled diflubenzuron showed that 3-10% of diflubenzuron 

 applied externally was transferred between the sexes, but the testes of treated 

 males contained insufficient diflubenzuron to affect hatch if the material were 

 transferred to females. Diflubenzuron is apparently transferred between the 

 sexes by physical contact; transfer by copulation seems highly improbable. 



683. , and Taft, H. M. 1969. Effect of melatonin on egg production of the 

 boll weevil, Anthonomus grandis . Ann. Entomol. Soc. Am. 62: 252. 



The effect of melatonin on eg'g production of the boll weevil was determined. It 

 was found that 50 mg melatonin/100 g of diet, significantly reduced the number 



