Abstract

The rate of disappearance of a 0.1% aqueous sodium Fluoresce in solution after being sprayed on adult male and female Manduca sexta (L.) and subsequently exposed in the laboratory, in the field, and in light traps was compared by spectroflnorometry. Also, when 1710 similarly marked male moths were released over a 2-month period on the island of St. Croix, 4.3% were recaptured in light traps. The fluorescein tagging proved effective and more sensitive than oil paint as a marker for the tobacco hornworm.

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