197 



A diet containing the high gossypol fraction from cottonseed as the principal 

 protein source suppressed the growth of gut bacteria and slightly improved 

 egg hatch of this i'ls^ct. '• •. ' 



382. ; McKibben, G. H.; Mitchell, E. B.; and Johnson, W. L. 1979. 

 Identification and field evaluation of the compounds comprising 

 the sex pheromone of the female boll weevil. J. Chem. Ecol. 5: 

 617-627. 



The terpenoid compounds (+)- cis- 2-i3operpenyl-l-methylcvclobutaneethanol (I), 

 (Z)-3,3-dimethyl-A' '^-cyclohexaneethanol (II), and B-caryophyllene were iso- 

 lated from f rass of the female boll weevil ( Anthonomus grandis Bohaman) . In 

 laboratory bioassays, a mixture of these components attracted primarily males, 

 whereas the male pheromone, grandlure, attracted primarily females. The 

 addition to the cotton bud hydrocarbons, a-pinene, mircene, and l;-limenene, 

 improved the response by males so that the potency of the mixture was com- 

 parable to that of grandlure for females. In field test, I+II+hydrocarbons 

 attracted both sexes, but grandlure alone and grandlure + hydrocarbons were 

 more effective. 



383. ; Miles, L. R.; Thompson, A. C; and Gueldner, R. C. 1972. Constituents 

 of the boll weevil. V. Factors inhibiting larval development. J. Econ. 

 Entomol. 65: 1232-1235. 



Solvent extracts from larvae and adults of Anthonomus grandis Boheman 

 produced numerous morphological changes whrn they were applied topically 

 (1-100 yg/insect) to larvae and pupae; egg hatch also was decreased. The 

 extracts possessed a potency (ED^q = 1-25 yg/insect) comparable to that of 

 synthetic cecropia juvenile hormone (a mixture of isomers) . Larval develop- 

 ment was arrested for 3-4 weeks when larvae were treated with the acetone 



and peLroleum ether extracts. 

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