温州ミカン園におけるブロマシル除草剤の連年使用の影響に関する研究 : 第1報草種および草量の年次変化に及ぼす影響

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1. At the Fuchu Branch of Kagawa Agricultural Experlmental Station a thorough study on the use of bromacil herbicide in a citrus orchard was conducted over a period of ten years (1967 to 1976). the results revealed the effectivenes of this herdicide on annual variation of weed and population. 2. The experimental method and material in this study is summarized as follows: a . Three years old citrus tree, "Hayashi" Satsuma Mandarin (Citrus Unshiu Marcovitch), were planted in concrete block plots with clay loam soil.b. Bromacil 80 % wettable powder were applied annually at the rate of 20, 40, 100 and 200g per 100 m^2. c . Weeds in a control plot were prepared by hand mowing with no comparative herbicide used. d . Investigation on the species and population of weeds was done late in June and tenth month past application. 3. Bromacil was effective on large crabgrass (Digitaria sanguinalis Scop.), dayflower (Commelelia cmmunis L.) and other summer weeds, whereas increased growth of wild amaranth (Amaranthas Blitum L.) and green foxtail (Setaria viridis L.) was noted, indicating some limitations on the spectrum of bromacil effectiveness. Incomplete effectiveness was also noted on Italian ryegrass and speed well (Veronica persica Poir.) due to the increased growth in spring. 4. Weed population and species number decreased in inverse proportion with application rates, in other words, effectiveness was proportionate with applied dosages. During the experiment period, it was observed that bromacil remained effective in a year with low precipitation. In years with heavy precipitation, duration of the effect was shortened.
日本雑草学会の論文
1977-12-25

温州ミカン園におけるブロマシル除草剤の連年使用の影響に関する研究 : 第1報草種および草量の年次変化に及ぼす影響

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温州ミカン園におけるブロマシル除草剤の連年使用の影響に関する研究 : 第1報 草種および草量の年次変化に及ぼす影響

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温州ミカン園におけるブロマシル除草剤の連年使用の影響に関する研究 : 第1報草種および草量の年次変化に及ぼす影響