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  • Author or Editor: Robert F. Schwartz x
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Abstract

Concentrations from 0.00 to 7.00 mg/ml of 2-tridecanone were applied directly to the bottom of petri dishes or to filter paper in dishes and assayed with tobacco hornworm larvae (Manduca sexta L.). The rate and extent of hornworm mortality were greater in the assay without filter paper. The LC50 for the assay with filter paper was 10.6 µg/cm2 and 4.1 µg/cm2 without filter paper. These results indicate that the test without filter paper is a more sensitive bioassay for antibiotic effects on tobacco hornworm larvae.

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