Spatial Distribution of Aphid, Uroleucon Compositae Theobald on Safflower.

ABSTRACT

A Field experiment was carried out during 2011-12 rabi to study the spatial distribution of aphid, Uroleucon compositae (Theobald) on safflower. Various indices of dispersion, i.e. variance-mean ratio, dispersion parameter, David and Moore’s index, Charlier coefficient, Index of Lexis and Llyods index of patchiness revealed that safflower aphid followed aggregated distribution throughout the crop growth.