Objectives: The main object of this paper is to develop a constructive approach towards weeds and study their geographical distribution.
Methods/Statistical Analysis: The weed plants for the present study were random surveyed from in and around Chennai, Tamil Nadu. The weed plants were authentically identified with the help of Floras. The identification was based on floral and leaf characters. Some of the plants are selected for the preparation of extracts to control the larvicidal activity based on the standard basic principles.
Findings: A survey on weeds reveals that most of the weeds are of native flora and appear to be uniform distribution throughout state.
Application/Improvements :The knowledge of the geographical position and physiography of the state is essential in order to understand the distribution of weeds and their invasion.