196 



380. ; Lindig, 0. H. ; Gueldner, R. C; and Thompson, A. C. 1975. A 

 study of the air space volatlles present in a boll weevil mass 

 rearing facility. J. Econ. Entomol. 68: 592-594. 



The air-space volatiles present in the Robert T. Cast Rearing Laboratory 

 at Mississippi State, Miss., were determined by pulling an air stream through 

 a pourous polymer, desorbing the volatiles with pentane, and analyzing 

 them by GLC-MS. The volatiles from the diet, the diet wax, and the insects 

 (Anthonomus grandis Boheman) were similarly analyzed in an attempt to 

 identify the sources of the volatiles in the air space. A total of 168 com- 

 pounds was identified from these sources including 35 aliphatic hydrocarbons, 

 30 aliphatic alcohols, 26 aliphatic carbonyl compounds, 23 aromatic hydrocar- 

 bons, 13 aromatic carbonyl compounds, 7 phenols and cresols, 7 gamma- lactones , 

 6 ethers and furans, 5 aromatic alcohols, 5 heterocyclin compounds, 8 

 phthalates, and 3 other esters. The low molecular weight alcohols, carbonyl 

 compounds, esters, and a pyrazine present chiefly in the diet volatiles 

 were attributed to microbial contamination. The gama- lactones were believed 

 derived during the cooking of the diet, and most of the n-alkyl hydrocarbons 

 were derived from the diet ware. The facility mechanical plant was presumably 

 the source of a number of aromatic hydrocarbons that are typical trace 

 constituents of industrial oils. Small amounts of the pheromone alcohols 

 present in boll weevils were found in the rearing facility air-space, but 

 none were found in the insects themselves. 



381. ; Lindig, 0. H. ; Sikorowski, P. P.; and Wyatt, M. 1978. Suppressants 

 of gut bacteria in the boll weevil from the cotton plant. J. Econ. 

 Entomol. 71: 394-396. 



Several constituents of the cotton plant, Gossypium hirsutum L., including 

 gossypol, caryophyllene, gallic acid, and tannins, were identified as 

 effective suppressants of gut bacteria found in Anthonomus grandis Boheman. 



ti^^Vn^- . ". ' '^ -i ".i-LJ.. i-i^ 



Linijm. ».jf.jn-.- - ■ —»- ' u. jL-tijjjiMJinm. ' - -j-ik.m « n i mn ^ 



