James P. Minyard

Sex Pheromones Produced by Male Boll Weevil: Isolation, Identification, and Synthesis

The response of female boll weevils to males, Anthonomus grandis Boheman, in laboratory bioassays can be reproduced by exposure to a mixture of compounds I, II, and either III or IV, all isolated from male weevils and their fecal material. The same response was elicited by mixtures of tile synthesized coimpounds. Compound I is (+)-cis-2-isopropenyl-l-methylcyclobtutaneethanol; II, cis-3,3-dimethiyl->1,βcyclohexaneethanol; III, cis-3,3-dimethlyl->1,α-cyclohexaneacetaldehyde; and IV, trans-3,3-dimethyl->1,α-cyclohexanecetaldehyde.

Constituents of the cotton bud

Abstract The investigation of the alcohol fraction of the essential oil of cotton ( Gossypium hirsutum L. var. Deltapine Smoothleaf) with an integrated gas-liquid chromatography-mass spectrometry system resulted in the identification of 17 additional alcohols and β-ionone. Tentative assignments were made for 4 other alcohols. None of these has previously been reported in cotton.

Constituents of marsh grass: Survey of the essential oils in Juncus roemerianus

Abstract The essential oil of Juncus roemerianus was isolated by steam distillation with a yield of 0·01 % of the fresh grass. Analysis by combined GLC-MS gave evidence for the presence of 78 compounds. They included 13 benzene derivatives, 11 polycyclic (mostly naphthalene type) compounds, 8 cyclohexyl compounds, 32 acyclic compounds, 9 terpenoids, and 6 furan derivatives. In total, these compounds accounted for 46·6% of the oil. Due to the presence of tetrachlorobenzene and benzyl cyanide, other halogenated compounds and alkaloids can be anticipated.

Volatile constituents of the boll weevil

Abstract When the distillable oil from adult boll weevils, Anthonomus grandis , of both sexes was investigated with an integrated gas chromatographymass spectrometry system, evidence was obtained for a number of mono- and sesquiterpene hydrocarbons and some substituted anilines including o -toluidine; for some C 5 and C 6 alcohols and monoterpene alcohols; and for at least one sesquiterpene alcohol. The major components were a series of alkanes, alkenes, and alkyl alcohols of high molecular weight. This investigation was part of a study made to identify possible additional components of the pheromone produced by the boll weevil.