Beneficial effects of L-methionine in choline deficient diets of Oryzaephilus mercator (Fauvel) (Coleoptera).

Choline is an indispensable vitamin for Oryzaephilus mercator as its ommission in the diet results in slow growth and poor survival. These deficiency symptoms can be overcome by adding L-methionine to the choline-deficient diet. L-methionine however can improve the efficiency of the diet only up to a certain concentration beyond which no beneficial effects are recorded.