Abstract

The greatest production of virus occurred by continuously feeding 400–499 mg larvae on diet containing 1.5×105 polyhedral inclusion bodies (PIB)/ml. A highly significant relationship was found between the length of time fed on the virus and the viral concentration in the diet. A regression of PIB yielded on larval-death weight had a slope of 0.143, showing that for each milligram increase in larval weight, there was an increase of 1.43×106 PIB.

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