A New Marking Method Using a Sewing Needle: Effects on Survival Rate of Twenty-Eight-Spotted Lady-Beetles, Henosepilachna vigintioctopunctata Fabricius (Coleoptera: Coccinellidae)

Abstract

Adults of the twenty-eight-spotted lady-beetle were marked by piercing their elytra with a sewing needle. Sixteen of the twenty-eight natural spots seen on the elytra were used as piercing points. Marking-and-recapture experiments made in the field suggested that there was no significant difference between the mortality rates of needle-marked and unmarked adults. Marking with a needle seemed to have no harmful effect on the number of recaptures. No difference between survival rates of needle-marked and lacquer-marked individuals was seen in a field-cage experiment. © 1981, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.