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Spatial patterns and sequential sampling plans for melolonthine larvae (Coleoptera: Scarabaeidae) in southern Queensland sugarcane

Published online by Cambridge University Press:  10 July 2009

P. G. Allsopp  and
R. M. Bull
P. G. Allsopp
Affiliation:
Bureau of Sugar Experiment Stations, P.O. Box 651, Bundaberg, Queensland 4670, Australia
R. M. Bull
Affiliation:
Bureau of Sugar Experiment Stations, P.O. Box 651, Bundaberg, Queensland 4670, Australia
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Abstract

The within-row dispersion characteristics of larvae of Antitrogus mussoni (Blackburn), A. parvulus Britton, Lepidiota crinita Brenske, L. negatoria Blackburn, L. noxia Britton and L. picticollis Lea in sugarcane were determined in studies in southern Queensland, Australia. The Poisson distribution, negative binomial distribution, Iwao's regression model and Taylor's power law analysis were used to determine the relationship between mean and variance of larval counts. All methods examined showed that the larvae were slightly aggregated. Taylor's power law generally gave equivalent or better fits to the population dispersion compared with the other models. The power law relationship for L. picticollis differed from those of the other five species, and a common relationship for those five species was determined. Relationships to determine sample sizes for fixed levels of precision and fixed-precision-level stop lines for sequential sampling were developed for both L. picticollis and the other five species. There were functional relationships between the variance and mean of untransformed population counts for all species, and the suitability of transformation functions is discussed.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 79 , Issue 2 , June 1989 , pp. 251 - 258
Copyright
Copyright © Cambridge University Press 1989

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