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SPATIAL PATTERNS OF AND SAMPLING METHODS FOR ORIUS SPP. (HEMIPTERA: ANTHOCORIDAE) ON GREENHOUSE SWEET PEPPER

Published online by Cambridge University Press:  31 May 2012

J.L. Shipp ,
N. Zariffa  and
G. Ferguson
J.L. Shipp
Affiliation:
Agriculture Canada Research Station, Harrow, Ontario, Canada N0R 1G0
N. Zariffa
Affiliation:
Agriculture Canada Research Station, Harrow, Ontario, Canada N0R 1G0
G. Ferguson
Affiliation:
Agriculture Canada Research Station, Harrow, Ontario, Canada N0R 1G0
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Abstract

Intra- and inter-plant spatial patterns were determined for adults and nymphs of Orius insidiosus (Say) and O. tristicolor (White) on greenhouse sweet pepper for three greenhouses using four sampling methods. The population density of the Orius was monitored biweekly for 4 months from May to August using plant tappings, blossoms, plant leaves, and whole plants. The intra-plant spatial patterns of adult and nymphal populations of Orius were aggregated with the majority of the Orius collected from the top one-third of the plant. The inter-plant spatial pattern for the nymphs also was aggregated. However, the adults exhibited a random inter-plant spatial pattern. The accuracy of plant tapping, blossom, and leaf samples was determined for monitoring the adult and nymphal population densities of Orius throughout the growing season. The blossom sampling method for adult Orius was the best sampling method for monitoring the population density of Orius on greenhouse sweet pepper throughout the growing season.

Résumé

La répartition spatiale sur un seul plant et sur plusieurs plants a été étudiée par quatre méthodes d’échantillonnage chez des adultes et des larves d’Orius insidiosus (Say) et Orius tristicolor (White) élevés sur des plants de poivrons cultivés dans trois serres. La densité du peuplement d’Orius a été échantillonnée deux fois par semaine pendant 4 mois, de mai à août, dans la sève, les fleurs, les feuilles et les plants entiers. La répartition sur un seul plant était contagieuse, aussi bien chez les peuplements d’adultes que chez les peuplements de larves, et la majorité des insectes récoltés occupaient le tiers supérieur de la plante. La répartition sur l’ensemble des plants était également contagieuse chez les larves. Cependant, les adultes étaient répartis au hasard au sein de la population de plants. La précision des échantillons de sève, de fleurs et de feuilles dans l’évaluation des densités de population des adultes et des larves d’Orius a été déterminée pendant toute la saison de croissance. L’échantillonnage des insects adultes sur les fleurs est la méthode qui fournit la meilleure évaluation de la densité des peuplements d’Orius sur les poivrons durant toute la saison de la croissance.

[Traduit par la rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 124 , Issue 5 , October 1992 , pp. 887 - 894
Copyright
Copyright © Entomological Society of Canada 1992

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