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GROUND BEETLES (COLEOPTERA: CARABIDAE) AS PREDATORS OF THE CODLING MOTH, CYDIA POMONELLA (L.) (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

Elmer A.C. Hagley
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
W.R. Allen
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0

Abstract

Pterostichus melanarius Ill. was the predominant ground beetle recovered in pitfall traps in three blocks of apple trees at Jordan Station, Ont. In one block, C, the number of mature fifth-instar larvae of Cydia pomonella (L.) seeking overwintering sites was related significantly (r2 = 0.5476, P < 0.05) to the number of P. melanarius caught, but was not related significantly (r2 = 0.1181, P > 0.10) to the proportion of beetles that were serologically positive. The proportion of larvae pupating also was not related significantly (r2 = 0.2014, P > 0.10) to the number of P. melanarius. The total number of all predators caught was related significantly (r2 = 0.4490, P < 0.05) to the number of larvae present, but the proportion of larvae that pupated was not related significantly (r2 = 0.3606, P > 0.05) to the total number of predators.

In block A, in 1983–1985, the number of mature larvae of C. pomonella seeking overwintering sites was not related significantly (r2 = 0.3763, 0.3619, and 0.5042, P > 0.05, respectively) to the number of P. melanarius taken in pitfall traps. In both blocks A and B, the number of serologically positive beetles was not related significantly (r2 = 0.3824 and 0.7921, P > 0.10, respectively) to the number of larvae seeking overwintering sites.

Amara aenea DeG., Anisodactylus sanctaecrucis F., Bembidion quadrimaculatum oppositum Say, Clivinia impressifrons LeC., Diplochaeila impressicolis (Dej.), Harpalus aeneus F., and Pterostichus chalcites Say also gave positive serological reactions to the antiserum against C. pomonella.

The occurrence of other species of Lepidoptera did not affect significantly the results obtained for C. pomonella.

Résumé

Pterostichus melanarius Ill. est le carabe dominant capturé dans les pièges à fosse de trois blocs de pommiers à la Station Jordan (Ontario). Dans un bloc (C), le nombre de larves adultes de 5e stade de Cydia pomonella (L.) à la recherche de lieux d’hivernage est significativement relié (r2 = 0,5476, P < 0,05) au nombre de P. melanarius capturés, mais pas (r2 = 0,1181, P > 0.10) à la proportion de carabes sérologiquement positifs. Également, la proportion de larves en pupaison n’est pas corrélée significativement (r2 = 0,2014, P > 0,10) au nombre de P. melanarius. Le nombre total des tous les prédateurs capturés est relié significativement (r2 = 0,4490, P < 0,05) au nombre de larves présentes, mais la proportion de larves entrées en pupaison n’est pas corrélée significativement (r2 = 0,3606, P > 0,05) au nombre total de prédateurs.

Dans le bloc A, de 1983 à 1985, le nombre de larves adultes de C. pomonella cherchant des lieux d’hivernage n’était pas relié significativement (r2 = 0,3763, 0,3619 et 0,5042, P > 0,05, respectivement) au nombre de P. melanarius capturés dans les pièges à fosse. Dans les blocs A et B, le nombre de carabes sérologiquement positifs n’était pas corrélé significativement (r2 = 0,3824 et 0,7921, P > 0,10, respectivement) au nombre de larves à la recherche de lieux d’hivernage.

Amara aenea DeG., Anisodactylus sanctaecrucis F., Bembidion quadrimaculatum oppositum Say, Clivinia impressifrons LeC., Diplochaeila impressicolis (Dej.), Harpalus aeneus F. et Pterostichus chalcites Say ont également donné des réactions sérologiquement positives à l’antisérum contre C. pomonella.

La fréquence d’autres espèces de lépidoptères n’a pas influé significativement sur les résultats obtenus pour C. pomonella.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1988

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