氟磺胺草醚·烯草酮乳油对绿豆及红小豆田杂草药效试验

Experiments of Effect of Fomesafen and Clethodim EC for Control Weeds in Mung Bean and Red Bean Field

摘要:

本试验的主要目的是评价28%氟磺胺草醚·烯草酮EC对绿豆、红小豆田杂草的药效、杀草谱及对作物生长的安全性。试验采用苗后茎叶喷雾及田间定期调查的方法。28%氟磺胺草醚·烯草酮EC的杀草谱较广,对一年生禾本科杂草及大部分阔叶杂草有较好的防效。施药后15 d调查,对各种杂草的株数防效在78.2%¹00.0%之间;施药后30 d调查,株数防效在77.6%⁹5.9%之间,总鲜重防效在89.3%⁹7.4%之间。施药后,部分绿豆、红小豆着药叶片出现叶斑,后期可以恢复,对产量无影响。氟磺胺草醚·烯草酮在吉林省绿豆、红小豆田适宜使用剂量应为294.0 g a.i./hm²～357.0 g a.i./hm²,对水量375 L/hm²;绿豆、红小豆1～3片复叶期是使用该除草剂的最佳时期。

Abstract:

The paper aims to assess the weed control efficacy, controlling spectrum and safety of fomesafen and clethodim 28% EC in mung bean and red bean fields. Post-emergence spraying and periodic investigation were used in our experiments. This herbicide could control annual grass weeds and most of broad leaf weeds effectively because of broader controlling spectrum. The control effects were investigated 10 and 30 d after spraying. The quantitative control effects range from 78.2% to 100.0% after 10 d and from 77.6% to 95.9% after 30 d, the fresh weight control effects were from 89.3% to 97.4% after 30 d. Leaf spots appeared on some leaves of experimental crops after spraying and disappeared after a period of time, so the yield was not influenced. Appropriate dosage of this herbicide should be between 294.0 g a.i./hm² and 357.0 g a.i./hm², water supply quantity is 375 L/hm². One or three compound stage of mung bean and red bean is the best control period.