Investigations into the effect of automobile exhausts on the phenology, periodicity and productivity of some roadside trees

Abstract

In response to a polluted atmosphere, the phenology of <em>Ficus benyalensis</em> and <em>Eucalyptus</em> sp. was highly affected. The yield of seeds and fruits of <em>Gunincun officinale</em> and <em>Azadirachta indica</em> was lessened at the polluted sites. The automobile emissions significantly reduced the productivity in <em>G. officinale, F. bengalensis</em> and <em>Eucalyptus</em> sp., whereas, <em>A. indica</em> was comparatively resistant to vehicle exhaust pollution. Leaf area and dry weight were significantly reduced in most of the plants.