筑後川下流域のクリーク雑草「チクゴスズメノヒエ」の生態と防除 : 第5報草種問競合の利用と草魚による防除

概要

論文の詳細を見る
(1)In order to determine whether biological control of Paspalum distichum L. "Chikugo shuzumenohie", can be achieved competition with some other plants or weeding effect of grass-carp was investigated. (2) It was shown that the introduction of 6 fresh stumps of waterhyacinth per m^2 in the creek where P. distichum had been growing for several years, was ineffective in preventing the growth of this weed. But, when 2 Stumps of waterhyacinth per m^2 were added after application of glyphosate in the previous year in autumn, waterhyacinth grew more vigorously than the weed. (3) When pasture plants, soybean or other weeds were growing profusely on the slope of the creek, this weed could not outgrow them. (4) Since grass-carp ate this weed as well other aquatic weeds, the weeding effect of the fish was well recognized in the early stages of growth of the weed in the creek. (5) Judging from these results, it is concluded that the biological control of this weed at the early stage of growth in the creek could be achieved. However if the weed grows profusely in the creek, it is necessary to apply integrated control in combining biological, mechanical and chemical measures.
日本雑草学会の論文
1984-12-17