Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The weed flora in sugarcane fields of Palghat district.

Abstract

Eighty fields of sugarcane on red and black soils in Palghat district were surveyed for their weed populations during 1989-90. Of the 48 weed species identified, Ageratum conyzoides was the most widely distributed weed, occurring in 87% of sites surveyed, followed by Tridax procumbens, Eclipta prostrata, Commelina jacobi, Cynodon dactylon and Corchorus capsularis [jute]. Other weeds were more localized. Weed species identified as posing a threat because, although not necessarily widespread, they reached high densities within the crop included Cyperus rotundus, Oldenlandia affinis, Commelina benghalensis, Ageratum conyzoides and Echinochloa colona [E. colonum]. A frequency density index revealed A. conyzoides and C. rotundus to be the most widespread and serious weeds.