SPATIAL DISTRIBUTION OF THREE SPECIES OF COCCINELLID PREDATORS ON OAK PLANT

The spatial distribution of three coccinellid predators-Harmonia dimidiata Fabricius, Harmonia eucharis (Mulsant) and Cheilomenes sexmaculata Fabricius on oak plant was studied at experimental field of Regional Tasar Research Station (RTRS), Mantripukhri, Manipur during two consecutive cropping seasons (2009-10 & 2010-11). The various statistical parameters-variance to mean ratio, mean crowding, Llyod's index of patchiness, index of clumping, mean colony size, dispersion parameter-k, co-efficient of variance, Iwao's regression and Taylor's Power Law were used to study the distribution pattern of predators on oak plant. The predators were observed to follow contagious distribution on oak plant.