甘蔗除草剂的更新

The Renovation of Sugarcane Herbicide

由于阿特拉津的除草效果正在逐年下降，因此必须更新甘蔗的除草剂。其原因如下：（1）由于长期在同一蔗田连种甘蔗和使用单一的除草剂阿特拉津导致产生耐药性生物型草种；（2）阿特拉津可能污染地下水源，由于此原因，德国政附已禁止使用此药，并于1991年3月29日生效；（3）该药对甘蔗间作物有药害；（4）用药量偏高。根据更新除草剂的选择要求，赛克津是最适合取代阿特拉津的更新除草剂。

Since the efficacy of weed control by atrazine is being decreased year after year, therefore, the sugarcane herbicide should be renovated to substitute atrazine. It is based on the following condition: (1) The build up of tolerant biotype weed speeies resulting from the successive monoculturc of sugarcane and application of sole herbicide-atrazine: (2) poossible contamination of underground water by atrazine, because the German Government had already banned atrazine, it was effectivc on 29th March 1991; (3) injury on sugarcane intererops and(4) relativc high application rate. Bascd on the requirement for selecting a renovated herbicide, Metribuzin has been chosen as the most suitable herbicide to substitute atrazine.