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375 



ThufJ, plants containing gossypol seem preferred, but its presence does not 

 appear to be an absolute requirement for host acceptability. Of the species 

 tested, Cienfuegosia sulphurea (St. Hill.) Garki and Thespesia populnca (L.) 

 Soland ex Carrea seemed the most suitable wild hosts next to cotton. H. syriacus 

 again was not preferred. However, late in the season when it is near cotton it 

 is sometimes attacked. For this reason, and because of its wide geographical 

 distribution and general abundance as an ornamental throughout the Cotton Belt, 

 it is the most important of the alternative hosts to consider in any future 

 eradication programs against the boll weevil. 



735. ; Maxwell, F. G.; Jenkins, J. N.; and Mauldin, J. K. 1969. Amino acids 

 in hosts and nonhosts of the boll weevil, Anthonomus grandis . Ann. 

 Entomol. Soc. Am. 62: 255-260. 



Protein and nonprotein amino acids were detected in the buds of several hosts 

 and nonhosts of Anthonomus grandis Boheman by ion exchange chromatography, and 

 identifications were confirmed by thin-layer chromatography. Twenty-three amino 

 acids plus ammonia were identified in the cotton samples, including 5 that had 

 not been previously reported in cotton buds. These 5 were: beta-alanine, cysteic 

 acid, ethanolamine, glucosamine, and taurine. Concentrations were always greater 

 ■i a-t he protein samples. All plant buds analyzed contained 9 of the 10 amino 

 acids essential for the weevil. A microbiological assay detected tryptophan in 

 cotton bud tissue. Amino acid profiles of these hosts and nonhests were esta- 

 blished. There were not sufficient qualitiative and quantitative differences 

 in the amino acids to explain the host and nonhost status. 



736. Pelletier, S. W., and Mody, N. V. 1976. A facile synthesis of the 

 cyclohexyl constituents of the boll weevil sex pheromone. J. Org. Chera. 

 41: 1069-1071. 



The four monoterpene compounds [ (E)-3,3-dimethyl-Al »°-cyclohexaneacetaldehvde 



