Weed communities in rice granary areas in Peninsular Malaysia.
During surveys carried out 1989-90 in 8 rice granary areas of Malaysia (Kemubu, Besut, Projek Barat Laut Selangor (PBLS), Seberang Perak, Kerian, Seberang Perai and Muda), 78 weed species belonging to 53 genera in 33 families were recorded. Of these, 16 species were grasses, 35 broadleaved weeds, 20 sedges and 7 aquatic weeds. Weed species abundance and dominance differed greatly between each granary; Kembu was the most diverse (46 species) and Seberang Perak was the least diverse (26 species). Quantitative estimates based on Importance Value and other indices showed that Monochoria vaginalis, Saggitaria guyanensis, Limnocharis flava, Leptochlora chinensis, Echinochloa crus-galli and Fimbristylis miliacea were the dominant species.