480g/L异[口恶]草松EC对水稻田千金子的田间防除效果评价

Evaluation of the field control effect of clomazone 480 g/L EC on Leptochloa chinensis in paddy fields

为明确480 g/L异[口恶]草松EC对水稻田千金子的田间防除效果,采用田间药效试验方法评价了其在田间的综合表现,旨在为水稻田千金子防除提供解决思路。结果表明,480 g/L异[口恶]草松EC在使用剂量为40、50、60、70 m L/667m^(2)时,其对水稻田千金子防除效果较好,药后30 d千金子株防效及鲜重防效均可达80%以上,且对作物安全,优于20%氰氟草酯EC、10%[口恶]唑酰草胺EC、5%五氟磺草胺SC和25%二氯喹啉酸SC。建议以60 m L/667m^(2)的推荐剂量于杂草分蘖前均匀喷雾。

To clarify the field control effect of clomazone 480 g/L EC on Leptochloa chinensis in paddy fields,the field efficacy test method was used to evaluate its comprehensive performance in the field,aiming to provide solutions for the control of L.chinensis in paddy fields.The resultsshowed that when the dosage of clomazone 480 g/L EC was 40,50,60 and 70 mL/667m^(2),it had a good control effect on L.chinensis in paddy fields.The plant control effect and fresh weight control effect of L.chinensis could reach more than 80%30 days after application,and it was safe for crops,superior to cyhalofop-butyl 20%EC,metamifop 10%EC,penoxsulam 5%SC and quinclorac 25%SC.It was recommended to spray evenly before weed tillering at the recommended dose of 60 mL/667m^(2).