Constituents of the Cotton Bud. XIII. Further Studies on a Nonpolar Feeding Stimulant for the Boll Weevil123

Constituents of the cotton bud compounds attractive to the boll weevil

“…This multiplicity of compounds in the attractant complex is similar to the findings of Silverstein et al (1966) concerning the aggregating pheromone of the beetle Ips confusas (LeConte). It is also analogous to our findings concerning the boll weevil feeding stimulant complex in the cotton plant (Hedin et al, 1966;Struck et al, 1968a,b;Temple et al, 1968), as well as to most findings in mammalian food flavor and aroma studies. For the boll weevil, and perhaps for other insects as well, it appears likely that responses to plants as food sources are evoked by multicomponent mixtures rather than by single compounds.…”

Constituents of the cotton bud. Mass spectrometric identification of the major high-molecular-weight hydrocarbons in buds and flowers

“…Thin-layer chromatographic separation of the extracts gave fractions whose infrared and proton magnetic resonance spectra showed only typical hydrocarbon bands, and elemental analysis gave carbon and hydrogen analyses totaling 98 to 100 %. Although the hydrocarbon fraction lacked feeding-stimulant activity for the boll weevil (Temple et al, 1968), we were interested in verifying the only previous reports (Power andChesnut, 1925, 1926;Sadykov, 1965;Sadykov et at., 1964) in the literature of the hydrocarbons from comparable plant parts. This paper describes the identification of the major high-molecular-weight hydrocarbons from cotton buds and flowers using gas chromatographic and mass spectrometric techniques.…”

Secondary Metabolites of Gossypium: A Biogenetic Analysis

“…Some occur as glycosides. Expectedly, the pyrrole pigments chlorophyll, as well as pheophytin a and b, have been characterized in Gossypium (33,61).…”