Trogoderma beetles

Four species of Trogoderma beetles use methyl-branched alkenals as their major sex pheromones 300). Aeration of T. gramrium and trapping of the volatiles on Porapak Q gave a 92 8 ratio of (Z)- to ( )-14-methyl-8-hexadecenal. The Z-isomer was the major component obtained from T. inclusum and T. variabile and the -isomer was obtained from T. glabrum. In laboratory bioassays males could discriminate between the geometric isomers. 

Trogoderma variabile are small (0.3-0.6 cm in length), oval-shaped beetles that are dark in color with varying levels of yellowish banding on the elytra. 

A8 Rhiptortus, bugs 313 A9 Trogoderma, A10, A11 long-horned beetles 315 316... 

Tribolium confusum Jacqueline du Val Trogoderma granarium Everts confused flour beetle khapra beetle adult larva, adult FI, GR, T T9, 60... 

The Khapra beetle, Trogoderma granrium [169], cannot convert dietary phytosterols to C27-sterol. However, there is an increase in the concentration of cholesterol and campesterol in its tissues relative to the dietary concentrations of these sterols, presumably as a result of selective uptake [170]. 

Barak, A.V. 1989. Development of a new trap to detect and monitor Khapra beetle. Trogoderma granarium. J. Econ. Entomol. 82, 1470-1477. 

Coleoptera. Sterol metabolism studies with another important stored products pest, the khapra beetle, Trogoderma granarium, revealed another phytophagous Insect that is unable to dealkylate and convert C28 and C29 phytosterols to cholesterol (23). Similar results were obtained whether a diet consisting of cracked wheat and brewer s yeast or an artificial diet coated with radiolabeled sterols was used (24). There was some selective uptake of cholesterol from tFe dietary sterols, as indicated by an enrichment of cholesterol in the pupal sterols 1.2% of total), compared to the dietary sterols (0.5% of total). Unlike the previously discussed stored product coleopteran pests, T. confusum and T. castaneum, both of which had high levels of 7-dehycTrochoiesterol, Tfo 7-dehydrocholesterol could be identified in the sterols from the khapra beetle. 

C,7H320, Mr 252.4, liquid. Sexual pheromone of female khapra beetles (Trogoderma granarium) and other Trogoderma species belonging to the Dermes-tidae. Both the (Z)-form bp. 127-128 °C (84.5 Pa), [alo -5.94° (CHClj) and the ( )-form (bp. 127-128°C (108 Pa), d -4.72° (diethyl ether) are used by the various species. 

Me ester [25227-40-1 ]. Sex pheromone for the Khapra beetle Trogoderma inclusum. Also weak attractant for T. granarium. 

Sex pheromone of the Khapra beetle (Trogoderma inclusum) and T. granarium. 

Attraction and mutual inhibition of several beetles of the genera Ips, Trogoderma, and Gnathotrichus have been reported by many authors 464-469). Thus, I. paraconfusus and I. pini are two beetles which... 

It has now been demonstrated that walking insects locate an upwind odor source by at least three mechanisms. First, perception of an attractant chemical releases upwind orientation in certain species of flies Drosophila - Flugge, 1934), moths B. mori - Schwinck, 1954,1955), beetles Ipsconfusus - Wood and Bushing, 1963 Dendroctonusfrontalis - Payne eta/., 1916 Leptinotarsa desemlineata - De Wilde et al., 1969 Visser and Nielsen, 1977 Trogoderma variable - Shapas and Burkholder, 1978), locusts (Schistocerca gregaria -Kennedy and Moorhouse, 1969), cockroaches P. americana - Rust et al., 1976) and ants Novomessor - Hdlldobler et al., 1978). 

Finger, A., Heller, D. and Shulov, A. (1965) Olfactory response of the Khapra beetle Trogoderma granarium) larva to factors from larvae of the same species. Ecology, 46, 542-3. 

The kapra beetle Trogoderma granarium and other species of Trogoderma use derivatives of the anteiso-unsaturated acid (i, Z)-14-methyl-8-hexadecenoic acid, such as the methyl ester and the corresponding alcohol (Figure 3.12), the aldehyde and derivatives with the is-double bond, as part of the female-produced sex attractant. 

Levinson, H. Z., and A. R. Bar Ilan Olfactory and tactile behavior of the khapra beetle, Trogoderma granarium, with special reference to its assembling scent. J. Insect Physiol. 16,561—572(1970). 

Yarger, R. G., R. M. Silverstein, and W. E. Burkholder Sex pheromone of the female dermestid beetle Trogoderma glabrum (Herbst). J. Chem. Ecol. 1, 323—334... 

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