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25%双环磺草酮悬浮剂防除杂草稻的使用策略

田志慧 盛光勇 袁国徽 沈国辉

田志慧, 盛光勇, 袁国徽, 沈国辉. 25%双环磺草酮悬浮剂防除杂草稻的使用策略[J]. 农药学学报, 2020, 22(4): 635-641. doi: 10.16801/j.issn.1008-7303.2020.0111
引用本文: 田志慧, 盛光勇, 袁国徽, 沈国辉. 25%双环磺草酮悬浮剂防除杂草稻的使用策略[J]. 农药学学报, 2020, 22(4): 635-641. doi: 10.16801/j.issn.1008-7303.2020.0111
TIAN Zhihui, SHENG Guangyong, YUAN Guohui, SHEN Guohui. Application strategy of 25% benzobicyclon SC in controlling weedy rice[J]. Chinese Journal of Pesticide Science, 2020, 22(4): 635-641. doi: 10.16801/j.issn.1008-7303.2020.0111
Citation: TIAN Zhihui, SHENG Guangyong, YUAN Guohui, SHEN Guohui. Application strategy of 25% benzobicyclon SC in controlling weedy rice[J]. Chinese Journal of Pesticide Science, 2020, 22(4): 635-641. doi: 10.16801/j.issn.1008-7303.2020.0111

25%双环磺草酮悬浮剂防除杂草稻的使用策略

doi: 10.16801/j.issn.1008-7303.2020.0111
基金项目: 上海市现代农业水稻产业技术体系(202003);上海市科技创新行动计划(16391901800);上海市农业科学院卓越团队项目[农科创2018(B-01)]
详细信息
    作者简介:

    田志慧,女,副研究员,主要从事杂草管理学研究,E-mail:tianzhihui@saas.sh.cn

    通讯作者:

    沈国辉,通信作者(Author for correspondence),男,研究员,主要从事杂草管理学研究,E-mail:zb5@saas.sh.cn

  • 中图分类号: S482.4

Application strategy of 25% benzobicyclon SC in controlling weedy rice

  • 摘要: 杂草稻Oryza sativa f. spontanea是一种危害水稻生产、具有杂草特征的水稻,筛选可防除杂草稻的除草剂可有效解决防除杂草稻的难题。为明确25%双环磺草酮悬浮剂(SC)防除杂草稻的使用策略,采用盆栽试验测定了25%双环磺草酮SC 不同用药剂量、用药时间和用药方式 (喷雾法和毒土法) 对杂草稻的防除效果及对水稻的安全性。结果表明:25%双环磺草酮SC按有效成分150~375 g/hm2的剂量分别于杂草稻萌芽期、立针期、1~2叶期和2~3叶期施用,当采用喷雾法施药时,其对杂草稻的株数防效分别达98.0%~100%、94.0%~100%、94.0%~100%和83.0%~100%,而采用毒土法施药时,其防效分别为51.0%~100%、56.0%~93.0%、27.0%~89.0%和28.0%~71.0%;在有效成分为187.5 g/hm2和375 g/hm2剂量下,喷雾法施药对水稻各项生长指标无不良影响,而毒土法施药则对水稻株高、根长、根系和植株鲜重等均有抑制作用。表明与毒土法相比,喷雾法施药具有防除效果好、使用期宽和对水稻安全性高等优点,但该药的速效性较差,施药后20~30 d方能达到最佳防效。本着高效、经济、安全的原则,推荐25%双环磺草酮SC防除杂草稻的使用策略为:于杂草稻萌芽期至1~2叶期采用喷雾法施药,推荐使用剂量为有效成分150~187.5 g/hm2,如推迟至杂草稻2~3叶期防除,则使用剂量应提高至187.5~225 g/hm2。施药时应有水层1~2 cm,施药后保持水层5 d以上。
  • 1  双环磺草酮结构式

    1.  The structural formula of benzobicyclon

    表  1  25%双环磺草酮SC在不同施药剂量及不同施药时期对杂草稻的防除效果 (药后14 d)

    Table  1.   Control efficacy of 25% benzobicyclon SC on weedy rice under different dosage and different application time (14 days after application)

    施药方法
    Application method
    有效成分剂量
    Dosage, a.i./(g/hm2)
    株数防效 Plants control efficacy/%
    施药时期 Application time
    萌芽期
    Germination stage
    立针期
    Needle leaf stage
    1~2 叶期
    1-2 Leaf stage
    2~3 叶期
    2-3 Leaf stage
    毒土法 Poisoned soil 150.0 16.0 c 11.0 c 5.0 d 3.0 b
    187.5 24.0 bc 14.0 c 7.0 cd 2.0 b
    225.0 31.0 bc 18.0 c 13.0 bcd 4.0 b
    375.0 42.0 b 41.0 ab 33.0 ab 5.0 b
    喷雾法 Spray 150.0 32.0 bc 25.0 bc 24.0 abcd 8.0 b
    187.5 46.0 b 28.0 bc 28.0 abc 21.0 ab
    225.0 68.0 a 41.0 ab 33.0 ab 19.0 ab
    375.0 83.0 a 49.0 a 43.0 a 30.0 a
    注:同列数据后不同小写字母表示存在显著差异 (P<0.05)。Note:Different lowercases in the same column indicate significant differences (P<0.05).
    下载: 导出CSV

    表  2  25%双环磺草酮SC在不同施药剂量及不同施药时期对杂草稻的防除效果 (药后28 d)

    Table  2.   Control efficacy of 25% benzobicyclon SC on weedy rice under different dosage and different application time (28 days after application)

    施药方法
    Application
    method
    有效成
    分剂量
    Dosage, a.i./(g/hm2)
    施药时期 Aplication time
    萌芽期
    Germination stage
    立针期
    Needle leaf stage
    1~2 叶期
    1-2 Leaf stage
    2~3 叶期
    2-3 Leaf stage
    株数防效
    Plants control efficacy/%
    鲜重防效
    Fresh weight control efficacy/%
    株数防效
    Plants control Efficacy/%
    鲜重防效
    Fresh weight control efficacy/%
    株数防效
    Plants control efficacy/%
    鲜重防效
    Fresh weight control efficacy/%
    株数防效
    Plants control efficacy/%
    鲜重防效
    Fresh weight control efficacy/%
    毒土法
    Poisoned soil
    150.0 51.0 b 52.3 b 56.0 d 8.5 b 27.0 e 2.3 c 28.0 e −0.2 c
    187.5 98.0 a 77.8 a 78.0 c 14.0 b 46.0 d 6.2 c 39.0 e −4.0 c
    225.0 98.0 a 92.3 a 82.0 bc 22.2 b 60.0 c 13.1 c 56.0 d −0.7 c
    375.0 100.0 a 100.0 a 93.0ab 80.3a 89.0b 45.8b 71.0 c 21.3 bc
    喷雾法
    spray
    150.0 98.0 a 96.3 a 94.0 ab 88.7 a 94.0 ab 71.8 ab 83.0 bc 23.9 bc
    187.5 100.0 a 100.0 a 96.0 ab 91.8 a 95.0 ab 83.2 a 92.0 ab 57.3 ab
    225.0 100.0 a 100.0 a 96.0 ab 94.3 a 98.0 ab 91.4 a 95.0 ab 72.6 a
    375.0 100.0 a 100.0 a 100.0 a 100.0 a 100.0 a 100.0 a 100.0 a 100.0 a
    注:同列数据后不同小写字母表示存在显著差异 (P<0.05)。Note:Different lowercases in the same column indicate significant differences (P<0.05).
    下载: 导出CSV

    表  3  不同施药方法及施药剂量下25%双环磺草酮SC对水稻生长的安全性 (药后14 d)

    Table  3.   Effect of 25% benzobicyclon SC on rice under different application method and different dosage (14 days after application)

    施药方法
    Application method
    有效成分剂量
    Dosage, a.i./(g/hm2)
    茎蘖数
    Number of steam
    and tillering
    株高
    Plant height/cm
    根长
    Root length/cm
    植株鲜重
    Plant fresh weight/g
    根部鲜重
    Root fresh weight/g
    毒土 Poisoned soil 187.5 2.79 a 238.54 b 57.92 b 0.64 b 0.29 c
    375.0 3.06 a 253.60 b 56.69 b 0.77 b 0.39 bc
    喷雾 Spray 187.5 3.50 a 320.75 a 79.79 a 1.45 a 0.66 ab
    375.0 3.57 a 282.43 ab 81.54 a 1.25 a 0.49 abc
    CK 3.69 a 327.01 a 90.28 a 1.71 a 0.70 a
    注:同列数据后不同小写字母表示存在显著差异 (P<0.05)。Note:Different lowercases in the same column indicate significant differences (P<0.05).
    下载: 导出CSV
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  • 收稿日期:  2019-11-10
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