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ELYTRAL PUNCTURES: A RAPID, RELIABLE METHOD FOR MARKING COLORADO POTATO BEETLE

Published online by Cambridge University Press:  31 May 2012

T.R. Unruh
Affiliation:
Yakima Fruit and Vegetable Insect Research Laboratory, USDA, ARS, Yakima, Washington, USA 98902
R.L. Chauvin
Affiliation:
Yakima Fruit and Vegetable Insect Research Laboratory, USDA, ARS, Yakima, Washington, USA 98902

Abstract

A simple, inexpensive, permanent method for individually marking Colorado potato beetle is presented. The method consists of puncturing the elytra within the cream-colored longitudinal bands using a minuten nadeln; the wound response produces intense melanization at the point of puncture. Division of a band into three zones, each potentially receiving a dot, produces an octal digit. If all eight bands are employed, more than 16 million beetles can be uniquely marked. No significant survival effects of marking were seen in teneral, post-teneral, or post-diapause adult beetles. Propensity to fly in mid-summer beetles was generally unaffected by marking. Probabilities of mismarking and misreading are negligible if sufficient care is employed.

Résumé

On trouvera ici la description d’une méthode simple, peu coûteuse et permanente de marquer des Doryphores de la pomme de terre. La méthode consiste à perforer les élytres de l’insecte dans les bandes longitudinales de couleur crème au moyen de miniépingles entomologiques (minuties); la réaction à la blessure entraîne une forte mélanisation au point de perforation. La division de chaque bande en trois zones, chacune pouvant recevoir une perforation, produit un système octal. Si les huit bandes sont utilisées, plus de 16 millions de doryphores peuvent ainsi être marqués de façons différentes. Le marquage ne semble produire aucun effet significatif sur la survie des adultes tôt après l’émergence, après l’émergence ou après la diapause. La capacité de voler au milieu de l’été n’est généralement pas affectée par le marquage. La probabilité de faire des erreurs de marquage ou de lecture des marques est très facile à éviter avec un minimum d’attention.

[Traduit par la rédaction]

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1993

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