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Distribution Pattern of the Sugarcane Shoot Borer, Chilo infuscatellus Snellen

Published online by Cambridge University Press:  19 September 2011

Hans R. Sardana
Hans R. Sardana
Affiliation:
Sugarcane Breeding Institute, Regional Centre, Karnal-132001, India
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Abstract

Studies were conducted on the spatial distribution of the sugarcane shoot borer, Chilo infuscatellus Snellen. Distribution was aggregated and described by the negative binomial model with a fixed mean size. Aggregated distribution probably resulted from environmental heterogeneity. The five quadrants of the field, i.e. north, south, east, west and central did not differ significantly in borer population. The optimum sample size, based on Iwao's formula, was 126 plants of 6 tillers each. The relevance of these findings to the management of C. infuscatellus is discussed.

Résumé

Des études ont été menées sur la distribution spaciale du foreur de bourgeon de la canne à sucre, Chilo infuscatellus Snellen. La distribution fut aggrégative et suivait le modèle binomial négatif avec une moyenne fixe. La distribution en aggrégat a probablement résulté de l'hétérogénéité environmentale. Les cinq quadrants du champs c.à.d. le quadrant nord, sud, est, ouest et central n'ont pas montré de différence significative de la population du foreur. La taille optimale d'échantillon, basée sur la formule d'Iwao, fut de 126 plantes de 6 talles chacune. Les résultats saillants pour le contrôle et la gestion de C. infuscatellus sont discutés.

Keywords

Chilo infuscatellussugarcane shoot borerdistribution patternChilo infuscatelluscanne à sucremode de distribution
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 17 , Issue 3-4 , December 1997 , pp. 369 - 372
Copyright
Copyright © ICIPE 1997

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