Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Competition of bearded sprangletop (Leptochloa fascicularis) with rice (Oryza sativa).

Abstract

In field trials in 1977-9, yields of drill-sown lowland rice cv. Lebonnet at opt. stands of 215-270 plants/m2 were reduced 9, 18, 20 and 36% by L. fascicularis densities of 11, 22, 54 and 108 plants/m2, resp. There was a linear decrease in rice grain yield of the equivalent of 21 kg/ha for each L. fascicularis plant/m2. Weed densities of 54 and 108 plants/m2 reduced yields of whole milled grain and a density of 108 plants/m2 reduced germination. The number of panicles produced by each L. fascicularis plant decreased as the weed density increased.