Larval diets from different protein sources for Mediterranean fruit flies (Diptera: Tephritidae)
1990
Chan, H.T. Jr | Hansen, J.D. | Tam, S.Y.T.
The effects of larval diets with different proteinsources were investigated on the development of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann). Casein, corn hydrolysate, soy protein, soy hydrolysate, yeast hydrolysate, lactoalbumin, lactoalbumin hydrolysate, and wheat gluten were tested as replacements fortorula yeast. Flies raised on soy hydrolysate had the highest pupation (63%), pupal weight (11.2mg), days to pupation (9.1 days), and least percentage eclosion (92.8%). Larvae failedto pupate when fed the corn hydrolysate diet. Pupal weight increased with protein levels,fitting to the regression model y = 5.5(ln x)0.5; after a rapid increase, pupal weight leveled offwith further increases beyond 5% dietary protein. Protein source and protein concentrationaffected pupal color; anomalous white pupae resulted from larvae reared on diets containing casein,soy protein, and lactoalbumin at a protein concentration of 3.6%. Increasing the dietary levelsof casein, soy protein, and lactoalbumin above 3.6% resulted in normal brownpupae.
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