三氟啶磺隆与精喹禾灵、嘧草硫醚混合药剂的田间防效及对棉花的安全性

Field Efficacy of Mixtures of Trifloxysulfuron with Quizalofop- p- ethyl and Pyrithiobac-sodium and Their Selectivity to Cotton

为了探究三氟啶磺隆与精喹禾灵、嘧草硫醚混用对棉田杂草的防效及其安全性，于2013年在山东省菏泽市农业科学院棉花试验地进行了田间试验。结果表明，三氟啶磺隆的各混用处理对香附子的防效最高，对马唐、牛筋草、鳢肠具有较好的防效，对铁苋菜、马齿苋的防效略低；当三氟啶磺隆与精喹禾灵（1：3）的混用剂量为100g／hm^2，三氟啶磺隆与精喹禾灵、嘧草硫醚（1：3：2）的混用剂量为105～120g／hm^2时，即可达到有效防治杂草的目的；与对照小区相比，各三氟啶磺隆混用处理增产14．6％～29．6％，且对棉花安全。

To determine the efficacy and selectivity of the mixture of trifloxysulfuron with quizalofop - p - ethyl and pyrithiobac - sodium in cotton, a field experiment was conducted at the Heze Academy of Agricultural Sciences in Shandong Province in 2013. Trifloxysulfuron in mixture with the other herbicides effectively controlled Cyperus rotundus and also provided good control of Digitaria sanguinalis ,Eleusine indica and Eclipta prostrate, but was less effective against Acalypha australis ,Portulaca oleracea. The mixtures of trifloxysulfuron plus quizalofop -p -ethyl （1 ： 3 ） at 100 g/hm^2, and of trifloxysulfuron plus quizalofop - p - ethyl plus pyrithiobac - sodium （ 1 ： 3 ： 2） at 105 - 120 g/hm^2 were selective to cotton and effectively controlled its weeds;all mixed treatments with trifloxysulfuron increased yield by 15% - 30% compared with the control treatment used in the village.