Philip E. Sonnet

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A sex pheromone of the navel orangeworm,Amyelois transitella (Walker), was obtained from ether rinses of the sex pheromone gland of calling females. The pheromone was isolated by means of liquid and gas chromatography and was identified as one of four possible geometrical isomers of 11,13-hexadecadienal by means of spectroscopic and microchemical methods.(More)
(Z)-II-Tetradecenyl acetate is the reported sex pheromone of European corn borer and redbanded leafroller moths. However, geometrically pure preparations of the compound are weakly attractive to these species. Presence of the E geometrical isomer in the Z is necessary for maximum sex attraction and these moths are "tuned" to respond optimally to specific(More)
A synthesis of (Z,Z)-11,13-hexadecadienal, a compound previously identified as the major component of the sex pheromone of the female navel orangeworm,Amyelois transitella (Walker), is described. The key step is the reduction of an unsymmetrical conjugated diyne with dicyclohexylborane. This reduction produced theZ,Z isomer with less than 0.5% total of(More)
Three strains of Geotrichum candidum (ATCC 34614, NRRL Y-552 and NRRL Y-553) were examined for lipase production and activity. Variables including medium, pH, temperature, agitation rate and incubation time were examined to define the optimal culture conditions. Growth on oil in complex medium at 30°C, 300 rpm, and pH 7 produced maximal lipase activity.(More)
The four stereoisomers of 8-methyl-2-decyl propanoate were tested in South Dakota for attractiveness to the northern corn rootworm,Diabrotica barberi Smith and Lawrence (NCR). Only the 2R,8R configuration was attractive to the NCR. Inhibition of the NCR response to 2R,8R occurred when either the 2S,8R or 2S,8S isomers were components of the pheromone(More)
A sex pheromone of the sweetpotato weevil,Cylas formicarius elegantulus (Summers), was obtained from collections of volatiles from virgin females, and pheromone was isolated by means of liquid and gas chromatography. The purification procedure was monitored by quantitative laboratory and field bioassays and the compound was identified as (Z)-3-dodecen-1-ol(More)
Configurationally pure (>99.6%) α-methylalkanoic acids have been employed to prepare chiral hydrocarbon semiochemicals. The stereoisomers of the following compounds were synthesized: 13-methylhentriacontane, 15-methyltritriacontane, and 15,19-dimethyltritriacontane. The first compound was identified earlier as a kairomone of the corn earworm while the other(More)
A crude preparation of lipases from the fungusGeotrichum candidum NRRL Y-553, which shows specificity toward cis-9 unsaturated fatty acids, was used to hydrolyze natural fats and oils, with the goal of producing industrially useful fatty acid and/or mono- and diacylglycerols products. Tallow and soy oil were hydrolyzed, producing free fatty acids high in(More)
Chromatograms of the cuticular lipids washed from recently emerged female and maleFannia canicularis (L.) flies were nearly identical, but by the time the flies were 5 days old, the cuticular components of the two sexes differed considerably. A monoolefin which constituted 66% of the cuticular lipid from 5-day-old females stimulated a copulatory response(More)