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为了解杂草稻(暂定名:Oryza sativa L.)的生物学特性和探索杂草稻的有效控制技术,开展了杂草稻落粒粳的防治研究。杂草稻落粒粳是在我国东北辽宁省丹东市的水稻田发现的,其植株比常规栽培稻高,容易掉粒。落粒粳颖果呈中长型,果壳稻草色或黄间黑灰色,小穗无芒或有芒,芒长4～12cm。颖果千粒重2.35g。种皮桔红色。落粒粳种子在13～38℃条件下的发芽率均大于88%。水层2.5～10cm 处理,落粒粳植株干重减少50%～69%。二甲戊灵660～990 g ai/hm~2处理对落粒粳的植株鲜重防效达到优良水平。二甲戊灵对常规栽培稻秀水11的生长无不良影响,对水稻安全。
In order to understand the biological characteristics of weedy rice (tentative name: Oryza sativa L.) and to explore the effective control technology of weedy rice, we carried out the research of weedy rice seedling japonica prevention and control. Weedy rice Lost grain japonica is found in the paddy field of Dandong City, Liaoning Province in northeastern China. Its plant is higher than the conventional cultivated rice and is easy to fall out of grain. Deciduous japonica fruit was medium-long, black-colored husk straw color or yellow, spikelets or mango, Mount length 4 ~ 12cm. Caryopsis thousand grain weight 2.35g. Seed coat orange. The germination rate of fallen japonica seeds was more than 88% at 13 ~ 38 ℃. Water layer 2.5 ~ 10cm treatment, shoots japonica plant dry weight decreased by 50% to 69%. Pendimethalin 660 ~ 990 g ai / hm ~ 2 treatment on the fresh weight of Japonica plant to achieve good levels of control. Pendimethalin has no adverse effect on the growth of conventional cultivated rice Xiushui 11 and is safe for rice.