芦苇、三棱草等是棉田中多年生恶性杂草，防除困难，对农业生产造成的危害很大，选择一种合适的药剂和浓度对防除此类杂草意义重大。农达是一种具有内吸传导作用的灭生性除草剂，施用得当除草效果显著。为此，我团进行了农达不同浓度除草效果试验，现将试验总结如下。1材料与方 Reed, Scutellaria barbata is a perennial vicious weed in the cotton field. It is very difficult to control and cause great harm to agricultural production. It is of great significance to choose a proper medicament and concentration to control such weeds. Nongda is a kind of biocidal herbicides with internal absorption and conduction, and proper application of weeding is remarkable. To this end, I conducted a group of three different concentrations of herbicidal effect test, the test is summarized as follows. 1 material and side