噁嗪草酮与五氟磺草胺或双草醚混用对水稻机插秧田杂草的防效及水稻的安全性

摘要

通过田间试验测定了1%噁嗪草酮悬浮剂(SC)与25 g/L五氟磺草胺可分散油悬浮剂(OD)或10%双草醚悬浮剂(SC)桶混使用对机插秧稻田杂草的防效及水稻的安全性.结果表明:1%噁嗪草酮SC 250、300、350 mL/667 m2 与25 g/L五氟磺草胺OD 80 mL/667 m2混用,1%噁嗪草酮SC 350 mL/667 m2与10%双草醚SC 10 mL/667 m2混用,在水稻移栽后7 d毒土撒施及移栽后13 d茎叶喷雾施用对稗属杂草、千金子、鸭舌草、耳叶水苋、异型莎草等杂草的防效均达91%以上,优于对照移栽前2 d 35%丙草胺·苄嘧磺隆可湿性粉剂(WP)80 g/667 m2 毒土撒施+移栽后7 d 50%苯噻酰草胺·苄嘧磺隆WP 75 g/667 m2毒土撒施处理、移栽后20 d 60 g/L 五氟磺草胺·氰氟草酯OD 100 mL/667 m2茎叶喷雾处理,移栽后7 d施药处理对杂草的防效高于移栽后13 d施药处理.1%噁嗪草酮SC 250、300、350 mL/667 m2与25 g/L五氟磺草胺OD 80 mL/667 m2或10%双草醚SC 10 mL/667 m2桶混在水稻移栽后7 d或13 d处理对机插秧水稻安全.%The efficacy and selectivity of oxaziclomefone 1% SC mixed with penoxsulam 25 g/L OD or bispyribacsodium 10% SC were assessed in mechanically transplanted paddy fields. oxaziclomefone 1% SC at 250,300,and 350 mL/667 m2 in mixture with penoxsulam 25 g/L OD at 80 mL/667 m2 or oxaziclomefone 1% SC 350 mL/667 m2 in mixture with bispyribac-sodium 10% SC at 10 mL/667 m2 sprayed at 7 or 13 days after transplanting provided above 91% control of Echinochloa spp.,Leptochloa chinensis (L. ) Nees,Monochoria vaginalis (Burm. f. ) Presl. ,Ammannia arenaria H. B. K. ,and Cyperus difformis L. This level of control was superior to that obtained with pretilachlor·bensulfuron 35% WP used before transplanting followed by mefenacet·bensulfuron 50% WP after transplanting,or penoxsulam·cyhalofop-butyl 60g/L OD applied at 20 days after transplanting. Oxaziclomefone 1% SC spayed at 250,300,and 350 mL/667 m2 mixture with penoxsulam 25 g/L OD or bispyribac-sodium 10% SC at 7 or 13 days after transplanting were selective to mechanically transplanted rice.