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近几年来,由于水稻田块大面积应用丁草胺、杀草丹等除草剂以来,稻田杂草草谱发生了一定的变化,特别是四叶萍等阔叶杂草的发生面积逐年扩大,为害程度逐年加重,已成为当前影响水稻生产的主要障碍因子。为了探索防除四叶萍等多种杂草的理想药剂和最佳用量,达到安全、高效、经济的目的,我们于1990～1991年进行部分药剂的药效试验,现将试验结果整理如下。
In recent years, weeds grass weeds have undergone some changes due to large-scale application of butachlor, herbicide and other herbicides in paddy fields, especially the occurrence of broadleaf weeds such as four-leaf weed has been expanding year by year, The degree of harm increased year by year, has become the main obstacle to the impact of rice production. In order to explore the ideal dose and the best dosage for controlling various weeds such as Siye Ping and to achieve the goal of safety, high efficiency and economy, we conducted the efficacy test of some medicaments from 1990 to 1991, and the test results are summarized as follows.