Spatial Distribution Pattern of Serpentine Leaf Miner (Liriomyza sativae) in Tomato (Lycopersicum esculentum L.) in Chhattisgarh

The distribution pattern of serpentine leaf miner (Liriomyza sativae) in tomato crop was studied during 2014 in Chhattisgarh region. 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, Morisita's index and Taylor's power law revealed that the serpentine leaf miner in tomato exhibited aggregated or contagious patternof distribution in the field. In study of Taylor's power law, slop parameter (b=2.6234) was > 1 indicating contagious (aggregated) or regular nature of distribution. This also indicates that serpentine leaf miner population followed negative binomial distribution pattern as an alternative of poisson distribution. Spatial distribution parameters are useful to the field study as well as to estimate the population density of serpentine leaf miner.