oa African Entomology - Development of a meridic diet for the sugarcane borer, Eldana saccharina Walker (Lepidoptera: Pyralidae). Principles, problems and possible in vivo plant resistance mechanisms



A synthetic diet that mimics the natural sugarcane diet of larvae of Eldana saccharina Walker was developed. Amino acid and fatty acid balances influenced larval survival and growth. Unsaturated fatty acid oxidation products, ascorbate-protein Amadori/Maillard products and phenolic derived quinones proved to be toxic, anti-nutritional or both of these. Iron, as a contaminant of agar, and reductants were implicated in the oxidation of unsaturated fatty acids. However, reductants including ascorbate, were necessary for maximal larval survival and growth. Possible ill vivo plant resistance mechanisms are suggested.


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