Lipid Characterization of Four Stored-Product Insects

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Larvae of almond moths, Cadra cautella (Walker) ; Indian meal moths, Plodia interpunctella (Hübner) ; confused flour beetles, Tribolium confusum Jacquelin duVal; and red flour beetles, T. castaneum (Herbst), were grown on blanched Runner peanut cotyledons and analyzed for lipid composition. Lipids of T. castaneum and T. confusum (Tenebrionidae) were composed largely of free fatty acids with lesser amounts of triglycerides while the lipids of C. cautella and P. interpunctella (Pyralidae) were composed primarily of triglycerides. Total fatty acids comprised 42% of body weight (dry weight basis) in C. cautella and 46% in P. interpunctella. Comparable values for T. castaneum and T. confusum were 23 and 26%, respectively. Thirteen fatty acids were identified in the Pyralidae, and of these the C16 and C18 series accounted for approximately 98% of total fatty acids. The most pronounced difference between species of Pyralidae was in the level of linolenic acid (18:3), with 2.28% in C. cautella and 0.28% in P. interpunctella. Sixteen fatty acids were identified in T. confusum and 17 in T. castaneum; C16 and C18 acids accounted for approximately 95% of the total.

Document Type: Research Article

Publication date: July 15, 1974

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  • Annals of the Entomological Society of America is published in January, March, May, July, September, and November. Annals especially invites submission of manuscripts that integrate different areas of insect biology, and address issues that are likely to be of broad relevance to entomologists. Articles also report on basic aspects of the biology of arthropods, divided into categories by subject matter: systematics; ecology and population biology; arthropod biology; arthropods in relation to plant diseases; conservation biology and biodiversity; physiology, biochemistry, and toxicology; morphology, histology, and fine structure; genetics; and behavior.
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