Man y kinds of weed s infestation appeared in the whole rice growth season, such as Echinochloa crusgalli (L.) Beauv, Spirodela polyrhiza, Sagittaria sagittifolia L.Potamogeton disinctus A.Benn.

• 杂草在整个水稻生长季节均有发生且发生种类很多，其中主要种类有碑草、紫背浮萍、慈姑、眼子菜等。