Combating unwanted vegetation with 2-aryl-5-substituted 1,3,4-oxadiazoles
专利汇可以提供Combating unwanted vegetation with 2-aryl-5-substituted 1,3,4-oxadiazoles专利检索，专利查询，专利分析的服务。并且Unwanted vegetation is combated by application of a class of phenyloxadiazoles which possess either or both pre and postemergent phytotoxicity. The herbicides as a class are severely toxic to a minority of plant species, most of the compounds having pre-emergent effectiveness against crabgrass. Some of the compounds, as for example, 2-(3'',4''-dichlorophenyl)-5-methyl1,3,4-oxadiazole, are particularly useful for pre-emergent control of weeds in a standing crop because of an almost total absence of post-emergent phytotoxicity. A small group of compounds, such as 2-dimethylamino-5-(2'',4''dimethylphenyl)-1,3,4-oxadiazole are predominantly post-emergent herbicides and a number of compounds, as for instance, 2diethylamino-5-p-tolyl-1,3,4-oxadiazole, have both pre- and postemergent activity and are useful in combating both crabgrass and broadleaf weeds in fields of small grains and in brome grass pastures.，下面是Combating unwanted vegetation with 2-aryl-5-substituted 1,3,4-oxadiazoles专利的具体信息内容。
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