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CONELET ABORTION IN JACK PINE CAUSED BY PLATYLYGUS LURIDUS (HEMIPTERA: MIRIDAE)

Published online by Cambridge University Press:  31 May 2012

Aunu Rauf ,
R. A. Cecich  and
D. M. Benjamin
Aunu Rauf
Affiliation:
Fakultas Pertanian, Institut Pertanian Bogor (IFB), Bogor, Indonesia.
R. A. Cecich
Affiliation:
North Central Forest Experiment Station, Foreshy Sciences Laboratory, Rhinelander, Wisconsin 54501.
D. M. Benjamin
Affiliation:
Department of Entomology, University of Wisconsin-Madison, Wisconsin 53706.
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Abstract

Conelet abortion in a jack pine, Pinus banksiana Lamb., seed orchard in Oneida County, Wisconsin was caused by Platylygus luridus (Reuter) (Hemiptera: Miridae) and ranged from 51% to 87% with the average 74.5% in 3 of 4 years. Adults preferred to feed on ovules in conelets and were 3 to 4 times more destructive than nymphs. When conelets were protected from this insect by coating the twig above and below the conelet with Tanglefoot®, abortion was below 11%. Other mirid adults including Phytocoris michiganae Knight, Pilophorus amoenus Uhler, Dichrooscytus suspectus Reuter, and Europiella n.sp. confined in cages with conelets did not induce abortion.

Résumé

Platylygus luridus (Reuter) (Hemiptera : Miridae), a causé l'avortement des cônelets dans une plantation de semis du pin Pinus banksiana Lamb, dans le comté d'Oneida au Wisconsin, avec un écart de 51 à 87 pourcent et une moyenne de 74.5 pourcent 3 ans sur 4. Les adultes ont montré une préférence pour les ovules des cônelets et étaient 3 à 4 fois plus dommageables que les larves. La protection des cônelets contre l'insecte à l'aide de "Tanglefoot®" appliqué sur la branchette au-dessus et en-dessous du cônelet a permis de réduire à 11 pourcent le taux d'avortement. L'avortement n'a pu être induit en confinant aux cônelets d'autres mirides adultes dont Phytocoris michiganae Knight, Pilophorus amoenus Uhler, Dichrooscytus suspectus Reuter et Europiella n.sp.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 9 , September 1984 , pp. 1213 - 1218
Copyright
Copyright © Entomological Society of Canada 1984

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