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Although rice is the principal host, around 30 other plants have been reported to be parasitized by RRN including cotton, corn, sugarcane, finger millet, pearl millet, okra, and tomato. Weeds including Chenopodium album, Echinochloa colona, E. glabrescens, Cyperus difformis, Rumex dentatus, Juncus spp., Reeds, common cattail (Typha latifolia), Scripus maritimus, umbrella sedge, and rusty sedge have also been reported as excellent hosts.