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分别在冬季和春季研究了15%麦极可湿性粉剂和6.9%骠马水乳剂对杂草的防除效果。研究结果表明,15%麦极对杂草的药效比6.9%骠马快。从杂草种类比较,草对各除草剂的症状反应出现得最快,其次是硬草,然后是看麦娘、野燕麦;从叶龄比较,1.5叶期杂草反应症状出现得最快,其次是3.5叶期杂草,最慢的是5~7叶期杂草。春季试验时,杂草药效症状较冬季试验时发展得快。冬季试验时,3.5叶期杂草对除草剂的药效反应症状较1.5叶期杂草发展得快;春季试验时,3.5叶期杂草对除草剂的药效反应症状较5~7叶期杂草发展得快。从试验最终结果来看,15%麦极对杂草的防效比6.9%骠马好;杂草的药效反应情况,从高到低依次为:野燕麦、草、看麦娘、硬草。建议15%麦极的施用剂量为10~13.3 g/667m2,在早春杂草3.5叶期左右时施药为宜。
The control effects of 15% WP and 6.9% Emulsion on weeds were studied in winter and spring respectively. The results show that 15% of the wheat pole weeds efficacy of 6.9% faster than horseshoes. Compared with the weed species, the symptom response of each herbicide appeared the fastest, followed by the hard grass, then the Ophiopogon grandiflora and wild oats. Compared with the leaf age, the symptom of weeds at 1.5 leaf stage appeared fastest, Followed by 3.5 leaf weeds, the slowest is 5 to 7 leaf weeds. In spring, weedy symptoms developed faster than in winter. In winter, the symptom of efficacy response of herbicide to weeds in 3.5-leaf stage was faster than that in 1.5-leaf stage. In spring, the symptoms of weeds in 3.5-leaf stage were weaker than those in 5 to 7-leaf stage Weeds develop rapidly. From the end of the test results, 15% of the pole of the weed control effect of 6.9% better than horseshoe; weed efficacy response, descending order: wild oats, grass, looking Anemarrhena, hard grass . Proposed 15% wheat pole application dose of 10 ~ 13.3 g / 667m2, spraying in the early spring about 3.5 leaf stage is appropriate.