Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effect of azolla inoculation on weed growth in wetland rice.

Abstract

The effect of azolla on growth of Echinochloa spp. in flooded rice was investigated during the 1981-2 samba season. Azolla pinnata was inoculated at 100-500 g/m2 1 wk after transplanting. A basal dressing of 50 kg P/ha and 50 kg K/ha was applied in 3 splits. Growth of Echinochloa spp. after 40 days decreased by 47% with inoculation of azolla at 100 g/m2 to a 76% reduction at 500 g/m2 compared with uninoculated controls. Grain yields increased from 3.6 t/ha in controls to 6.6 t with azolla inoculation at 500 g/m2.