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.
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Sardana, H.R. Distribution Pattern of the Sugarcane Shoot Borer, Chilo Infuscatellus Snellen. Int J Trop Insect Sci 17, 369–372 (1997). https://doi.org/10.1017/S1742758400019202
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DOI: https://doi.org/10.1017/S1742758400019202