西草净对谷子田一年生杂草活性及其安全性测定  

Weed Control Effect of Simetryn and Its Safety to Millet in Glasshouses

作　　者：庄占兴 孙文国 范金勇 胡尊纪 徐英 刘钰 庄治国 

机构地区：[1]山东省农药科学研究院山东省化学农药重点实验室,济南250033 [2]山东东泰农化有限公司,山东聊城252300

出　　处：《农药》2017年第7期531-534,共4页Agrochemicals

摘　　要：[目的]明确西草净对我国黄淮海区域谷子田常见一年生杂草活性和对谷子安全性,指导谷子田化学除草。[方法]采用盆栽法测定西草净在杂草苗前土壤处理施药方式下对谷子田常见5种杂草的活性及对2个谷子品种的安全性。[结果]西草净对禾本科杂草稗草、狗尾草的EC_(90)值为292.3816~303.5008 g a.i./hm^2,对阔叶杂草藜、反枝苋的EC_(90)值为114.8110~125.7192 g a.i./hm^2,对莎草科杂草异型莎草的EC_(90)值为93.5312 g a.i./hm^2,西草净对阔叶杂草和莎草科杂草活性明显高于对禾本科杂草的活性。西草净对2个谷子品种EC_(10)值均大于730 g a.i./hm^2,谷子与禾本科杂草之间的选择性指数在2.50左右,与阔叶杂草、莎草科之间的选择性指数大于7.0。[结论]西草净对谷子田一年生阔叶杂草、莎草科杂草活性高于对一年生禾本科杂草的活性,西草净使用剂量低于600 g a.i./hm^2对谷子安全。[Aims] This study aims to clarify the control effects of simetryn on the annual weed ofmiUet field and the safety in Huanghuaihai area in China, and guide the chemical weeding of millet field. [Methods] Pot experiments were conducted to determine the pre-emergence herbicidal activity and safety to millet of simetryn in glasshouses in Shandong Province. Dose-response of 5 weeds and two common millet varieties were tested. [Results] The ECg0 value of simetryn against gramineous weeds including Echinochloa crusgalli, Setaria viridis （L.） Beauv. were 292.3816- 303.5008 g a.i./ha, 114.8110-125.7192 g a.i./ha against broadleaf weeds including Cher^opodium album L, Amaronthus retroflexus L, and 93.5312 g a.i./ha against cyperaceae weeds including Cyperus difformis. The activity of simetryn on broadleaf weeds and cyperaceae was significantly higher than that on gramineous weeds. The ECa0 value of simetryn to two millet varieties were more than 730 g a.i./ha, the selectivity indexes between millet and gramineous weeds and between millet and broadleafweeds and Cyperaceae were around 2.50 and greater than 7.0 respectively. [Conclusions] The activity of simetryn against annual broadleaf weeds, Cyperaceae weeds was higher than that against annual grass weeds. Simetryn at recommended doses less than 600 g a.i./ha was safe on millet.

关 键 词：西草净 生物活性 谷子 安全性 

分 类 号：S451.22[农业科学—植物保护]