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No.5 (1958/12) >

Title :Esteron 245 薬剤によるリュウキュウチク(Pleioblastus linearis NAKAI)の駆除試験(予報)
Title alternative :Experiments in controlling Pleioblastus linearis Nakai with Esteron 245 (Preliminary Report).
Authors :大山, 保表
山盛, 直
Authors alternative :Oyama, Hohyo
Yamamori, Naoshi
Issue Date :Dec-1958
Abstract :An experiment was made on the effect of Esteron. 245 (2,4, 5-T Ester 65.3%) which is a product of Dow Chemical Company in Michigan, U.S.A., mixed with Kerosene for controlling “Ryukyu-chiku” (Pleioblastus linearis NAKAI) growing densely under “Okinawa-shii” (Castanopsis lutchuensis NAKAI) which is growing sparsely in Yona Forest of the University of the Ryukyus, Yona, Kunigami-son, Northern Okinawa. As stated below, the bamboos were treated with three (3) different concentration of the chemical. in three (3) methods of pre-application treatment of bamboo, and in three (3) different times. Measurements were made on the condition of sprouting and the number of crowns sprouted, and other observation were made. The results are stated in the following. Since the experiment was started a year ago, and it is being continued, the conclusion of the result has to await further experimental data. 1. The number of sprouts emerged between mid-April to the beginning of May was 64. 5%, and between mid-April to the latter part of June, 88. 3% of the total number of sprouts emerged between the latter part of May, 1958. 2. No sprout emerged in the year of 1958 in all plots applied with the chemical plots applied with the chemical on Oct. 2, 1957 and Feb. 3, 1958. 3. The percentages of crowns sprouted up to around the 21 st week from the application of the chemical to the total crowns treated were as follows: The percentages are so low that it is evident that the controlling effect is high. 4. The percentages crowns sprouted up to around the 21 st week from the application were as follows. The controlling effect was found to lie high even in the plot of no treatment of bamboos before application. 5. The percentage of sprouts in the plots treated on June 30, 1958 with water was 1.4% after the 21 st week of application. The percentages of sprouts according to the pre-application treatments of bamboos were as follows. Although the percentages of sprouts in the plot are higher and the controlling effect is lower in contrast to the plots treated on the same day with a mixture of the chemical with kerosene, it was found that the controlling effect of a mixture of chemical with water was also very high. (※一部省略)
Type Local :紀要論文
ISSN :0485-7828
Publisher :琉球大学農家政工学部
URI :http://hdl.handle.net/20.500.12000/22552
Citation :琉球大学農家政工学部学術報告 = The science bulletin of the Division of Agriculture, Home Economics & Engineering, University of the Ryukyus no.5 p.120 -134
Appears in Collections:No.5 (1958/12)

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