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

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

1.
上海市农业科学院生态环境保护研究所，上海 201403
2.
安顺学院，贵州安顺 561000

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
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出版历程
- 收稿日期: 2019-11-10
- 录用日期: 2020-04-17
- 刊出日期: 2020-08-19

Application strategy of 25% benzobicyclon SC in controlling weedy rice

1.
Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
2.
Anshun University, Anshun 561000, Guizhou Provice, China

摘要

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。
- 双环磺草酮 /
- 悬浮剂 /
- 杂草稻 /
- 防治效果 /
- 水稻田 /
- 使用策略
Abstract: Weedy rice (Oryza sativa f. spontanea) is a kind of rice with weed characteristics that harms rice production. Screening herbicides that can control weedy rice will effectively solve the problem of chemical control. In order to explore application strategy of 25% benzobicyclon SC, in different dosages, time and methods to control weedy rice, and safety to rice were studied by potted experiment. The results showed that 25% benzobicyclon SC had high herbicidal activity to weedy rice. Compared with the poisoned soil method, spray application had the advantages of fast acting speed,excellent control effect, wide use period and high safety to rice. After using 25% benzobicyclon SC 150-375 g a.i./hm² on weedy rice in germination stage, needle leaf stage, 1-2 leaf stage and 2-3 leaf stage respectively, the control effect of spray method on weedy rice reached 98.0%-100%, 94.0%-100%, 94.0%-100% and 83.0%-100%, but poisoned soil method was 51.0%-100%, 56.0%-93.0%, 27.0%-89.0% and 28.0%-71.0%. Under the dosage of 187.5 g a.i./hm² and 375 g a.i./hm² of 25% benzobicyclon SC, spraying application had no adverse effect on growth indexes of rice, but poisoned soil method had inhibition on rice plant height, root length, root and plant fresh weight. The efficacy of the benzobicyclon appears slowly, and the best control effect is generally achieved 20-30 days after herbicide application. The optimal control period of weedy rice should be from its germination stage to 1-2 leaf stage, spraying method, and recommended dosage was 150-187.5 g a.i./hm². If benzobicyclon SC is used during the 2-3 leaf stage of weedy rice, the dosage should be increased to 187.5 to 225 g a.i./hm². The water layer of 1-2 cm should be established and maintained at least 5 days when benzobicyclon SC was applied.
- benzobicyclon /
- suspension concentrate /
- weedy rice /
- control efficacy /
- rice field /
- application strategy

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1 双环磺草酮结构式

1. The structural formula of benzobicyclon

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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).

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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).

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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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