| 摘要 |
This has a high biological activity and is used in agriculture; in particular, in plant growing. It contains, as an active part, compounds with the common formula<IMAGE>where Ar is 2-, 3- and 4-pyridyl, 2-/3-methylpyridyl/-, 2-/4-methylpyridyl/-, 2-/5-methylpyridyl/-, 2-/6-methylpyridyl/-, 2-/5-chlorinepyridyl/-, 2-/3,5-dichlorinepyridyl/-, while X is either oxygen or sulphur.
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