Abstract

A field study was made during 2014 at Chhattisgarh region to study the spatial distribution of aphids (Aphis gossypii Glover) in brinjal (Solanum melongena Linn.). The various indices of dispersion, viz., variance mean ratio, exponent k, patchiness index, Lloyd’s mean crowding, David and Moore’s index, Cole’s index, Taylor’s power law and Morisita’s index revealed that the brinjal of aphid exhibited aggregated or contagious pattern of distribution in the field. In study of Taylor’s power law, slope parameter (b=1.166) was > 1 indicating contagious (aggregated) or regular nature of distribution. The aphid population infestation followed negative binomial distribution pattern as an alternative of poisson or random distribution. Spatial distribution parameters are useful in the field as well as to estimate the population density of aphid.

Keywords

References

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