乾田直播水稲に対するベンチオカーブの薬害発生要因の解析

概要

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Crop injury of bethiocarb to rice seedlings was investigated under different conditions in the direct seeding rice culture on upland field. The results obtained were as follows: 1. Increase of soil moisture content after benthiocarb application caused both decrease of percentage of establishment and inhibition of growth at the seedling stage. 2. Crop injury of benthiocrb was severe on seedlings in the treatments at germlnation and 0.8 to 1.0-leaf stage, but slight in the treatments at imperfect-leaf and second-leaf stages. 3. Double dose to standard (100g/a) did not cause any damage to seedlings seeded more than three cm depth, even under such conditions as high soil moisture content and any growth stage. Yields of rice did not reduce under the treatment of standard dose (50g/a) of benthiocarb when seeded deeper than one cm depth.
日本雑草学会の論文
1977-07-25