50%氟胺草唑WG防除沟叶结缕草草坪杂草技术研究

Study on Flupoxam Weeds conteol in Zoysia matrella Turf

为研究沟叶结缕草(Zoysia matrella)草坪杂草控制技术,采用田间试验,于沟叶结缕草休眠期喷施50%氟胺草唑WG,调查其对沟叶结缕草草坪杂草的防效以及对沟叶结缕草生长的影响。2011、2012年试验结果表明:于沟叶结缕草休眠期使用750~2 000 g·hm^(-2)50%氟胺草唑WG,沟叶结缕草生长安全,且能有效控制看麦娘(Alopecurus aequalis)、小飞蓬(Conyza Canadensis)、牛繁缕(Malachium aquaticum)、紫苑(Veronica persica)、波斯婆婆纳(Aster tataricus)和龙葵(Solanum nigrum)的危害,株数防效和鲜重防效均大于90%,持效期可达90 d以上。750~2 000 g·hm^(-2)50%氟胺草唑WG对看麦娘、小飞蓬、牛繁缕和紫苑的防效与56.25 g·hm^(-2)25%啶嘧磺隆WG之间无显著差异,而对波斯婆婆纳和龙葵的防效显著优于25%啶嘧磺隆WG。从高效、经济、环保等角度综合考虑,50%氟胺草唑WG防除沟叶结缕草草坪中杂草的适宜剂量为750~1 000 g·hm^(-2)。

Flupoxam is a newly developed herbicide for weed control in wheat,maize and soybean. Field experiments were conducted to evaluate its efficacy against weeds and safety to Zoysia matrella in 2011 and 2012. The results showed that,flupoxam applied at 750,1 000,1 500,2 000 g· hm^（-2） were safe to dormant Zoysia matrella and showed excellent control effect on Alopecurus aequalis,Conyza canadensis,Malachium aquaticum,Veronica persica,Aster tataricus and Solanum nigrum. The reduction in weed numbers and biomass were greater than 90 %,the persistent period was more than 90 days. Flupoxam had higher activities than flazasulfuron against Veronica persica and Solanum nigrum. Overall,the flupoxam could be an alternative herbicide for weed control in dormant Zoysia matrella turf,and the appropriate dosages were 750 and 1 000 g· hm^（-2）.