Abstract
Boll weevils, Anthonomus grandis grandis Boheman, were marked in growing cotton without any manual or mechanical manipulation of the insect by injecting Calco Oil Red N-1700® dye into the square with a syringe. After 21 days as an adult, 199 of 203 marked boll weevils contained enough dye to be seen readily under the integument of the abdomen. The 4 boll weevils not detected by the visual examination were found to be marked after being crushed and placed in a small vial containing acetone and a strip of filter paper.
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