多年生雑草クログワイの防除に関する2,3の試験

概要

論文の詳細を見る
1) Kuroguwai (Eleocharis tuberosa Shult. var. kuroguwai Makino), a perennial weed in paddy field, is one of the most difficult-to-control weed because of the irregular sprouting based on several factors as follows: i) Tubers were found evenly at various depths in the soil, up to subsoil. ii) During late autumn, the end of growing season of this weed, tubers were quite dormant, but this dormancy began to break in the next spring, and awaked condition continued during the rest of summer. Some tubers would be alive during more than one year without sprouting. iii) Furthermore, bud dormancy of the larger tubers located at the lower level of soil showed slower breaking than that of smaller ones at upper level. 2) Soil applications of chlorothiamid or amitrole at the early stage of tuber formation killed the foliage almost completely, and subsequent formation of tubers was considerably prevented, while MCP was less effective. 3) Soil applications of amitrole at three ripening stages of rice plant did not dicrease rice yield, and not prevented tuber formation, but amitrole accumulated in rice seeds and tubers of kuroguwai brought about toxicities such as chlorosis to their seedlings. 4) Kuroguwai grown in upland field, were completely controled by foliage application of paraquat before tuber formation. It is appeared, in practice, that one to three times applications are the most effective measure for the control of this weed, considering their sluggish sprouting.
日本雑草学会の論文
1969-08-30

多年生雑草クログワイの防除に関する2,3の試験

スポンサーリンク

概要

著者

関連論文

スポンサーリンク