摘要
以稗草和千金子为供试杂草,以南梗9108、南京11、K两优10号为供试水稻,通过室内整株生测法研究助剂GY-Tmax对双草醚、氰氟草酯防效和对水稻安全性的影响。结果表明,添加90 mL/667 m^2助剂GY-Tmax后,双草醚对3~4叶期稗草的ED90由3. 651 1 g a. i./667 m^2降至0. 932 9 g a. i./667 m^2,这表明助剂GY-Tmax明显增加了双草醚对稗草的防效;双草醚对千金子的防效较差,且助剂GY-Tmax对双草醚防除千金子无明显增效作用。添加90 mL/667 m^2助剂GY-Tmax后,氰氟草酯对3~4叶期稗草和千金子的防效均有所提高,氰氟草酯对稗草的ED90由10. 903 5 g a. i./667 m^2降至5. 231 1 g a. i./667 m^2,对千金子的ED_(90)由6. 840 0 g a. i./667 m^2降至2. 873 6 g a. i./667 m^2。添加90 mL/667 m^2助剂GY-Tmax后,双草醚和氰氟草酯对南梗9108、南京11、K两优10号水稻的安全性与不添加助剂时相当。
Whole-plant bioassays were conducted to evaluate the effects of the adjuvant GY-Tmax on the efficacy and selectivity of bispyribac-sodium and cyhalofop-butyl.Echinochloa crus-galli(L.)Beauv.and Leptochloa chinensis(L.)Nees.were used as test weedy plants along with the rice cultivars Nanjing 9108,Nanjing 11,and K Liangyou 10.The ED 90 value for bispyribac-sodium in E.crus-galli at the 3 to 4 leaf growth stage decreased from 3.65 g a.i./667 m 2 to 0.93 g a.i./667 m 2 after adding the adjuvant GY-Tmax at a dose of 90 mL/667 m 2.Bispyribac-sodium had limited efficacy against L.chinensis that was not improved by the addition of the adjuvant.Efficacy of cyhalofop-butyl applied to both weed soecies at the same growth stage(3-4 leaves)increased with the addition of GY-Tmax(also at 90 mL/667 m 2).Thus the ED 90 value of cyhalofop-butyl against E.crus-galli decreased from 10.90 g a.i./667 m 2 to 5.231 g a.i./667 m 2,and from 6.84 g a.i./667 m 2 to 2.87 g a.i./667 m 2 against L.chinensis.GY-Tmax added to either bispyribac-sodium or cyhalofop-butyl did not affect their selectivity to rice.
作者
肖慰祖
王红春
沈文飚
娄远来
张春华
张宗俭
XIAO Wei-zu;WANG Hong-chun;SHEN Wen-biao;LOU Yuan-lai;ZHANG Chun-hua;ZHANG Zong-jian(College of Life Sciences,Nanjing Agriculture University,Nanjing 210014,China;Plant Protection Institute,Jiangsu Academy of Agriculture Sciences,Nanjing 210014,China;Central Research Institute of China Chemical Science and Technology Co.Ltd.,Beijing 100083,China)
出处
《杂草学报》
2018年第2期41-47,共7页
Journal of Weed Science
基金
国家重点研发计划(编号:2016YFD0200503-4)
作者简介
肖慰祖(1993—),男,湖南怀化人,硕士研究生,主要从事除草剂应用和杂草科学研究。E-mail:1257090509@qq.com;通信作者:娄远来,博士,研究员,主要从事除草剂应用和杂草科学研究。E-mail:louyl@jaas.ac.cn。
