EFFECT OF NOMINEE (BISPYRIBAC-SODIUM) ON RICE CUTGRASS (LEERSIA ORYZOIDES) IN WATER SEEDED RICE IN HEILONGJIANG, CHINA
文献类型： 会议论文
第一作者： F. C. Han
作者： F. C. Han 1 ;
作者机构： 1.Plant Protection Institute of Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
关键词： rice;bispyribac-sodium;leersia oryzoides;echinochloa crus-galli
会议名称： The 18th Asian-Pacific Weed Science Society Conference v.2
主办单位：
页码： 787-792
摘要： Heilongjiang (HLJ) province is located in the northeastern part of P. R. China. Rice planted area in HLJ is roughly 1,750,000ha including about 200,000ha of water seeded rice. Sanjiang region, the eastern part of HLJ, is the main area of water seeded rice. Leersia oryzoides was first found in the field of Sangjiang region in 1983 and now it became one of the problem weeds in this region. The infestation of the weed is expanding 100,000ha. In order to control L. oryzoides, the herbicidal efficacy and crop safety of Nominee were evaluated against the weed and other main weeds in water seeded rice during 1998-2000. Nominee 100SC was applied in tank mixture with adjuvant, Surfactant A-100 at the rates of 22.5, 30, 37.5gai/ha (Surfactant A-100 at 225, 300, 375ml/ha) to L. oryzoides at 10-20cm in height and to Echinochloa crus-galli at 4-5 leaf stages. Nominee at 22.5, 30.0 and 37.5gai/ha controlled L. oryzoides 81-90%, 92-100% and 95-100%, respectively, and E. crus-galli over 95%. Some phytotoxicic symptoms such as yellowing and growth inhibition on rice plant were observed at 22.5-30.0gai/ha, but the rice plant recovered quickly within a week after application without any significant effect on rice yield. Phytotoxicic symptoms observed on rice plants at 37.5gai/ha recovered rather slowly compared to at 30.0gai/ha. Overall results from the field trials indicate that Nominee when applied at the rate of 22.5-30.0gai/ha and at 3-51eaf stages (10-20cm in height) of L. oryzoides can control the weed and other main weeds in water seeded rice most effectively without any adverse effect.
分类号： S3
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