著者

田中 千晴 佐々木 彩乃 笹山 哲央 小谷 弘哉 藤澤 英二 近藤 和夫 西野 実

出版者

関西病虫害研究会

雑誌

関西病虫害研究会報 (ISSN:03871002)

巻号頁・発行日

vol.63, pp.47-51, 2021-05-31 (Released:2021-09-01)

参考文献数

12

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三重県のゴマ圃場で多発するミナミアオカメムシNezara viridula(Linnaeus)の加害が収量および油脂の成分品質に及ぼす影響を調査した。登熟期間を通して成幼虫10頭/株を加害させたところ,精子実重は顕著に低下し,しぼんだ形状の未熟粒が多数発生した。また,精子実重および粒数の減少は登熟後期よりも登熟初期の加害において顕著であった。精子実の油脂の酸価は登熟後期よりも登熟中期に加害された場合に上昇した。無農薬栽培圃場では開花直後から成幼虫が発生し,開花5週目に成幼虫数は最多となった。

著者

高波 鐵夫 村井 芳夫 町田 祐弥 斉藤 市輔 牧野 由美 勝俣 啓 山口 照寛 西野 実

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.57, no.3, pp.291-303, 2005-02-20 (Released:2010-03-11)

参考文献数

21

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Nine OBSs (Ocean Bottom Seismographs) were deployed just before the 2003 Tokachi-oki earthquake (M8.0) in the source region, off Hokkaido island, Japan for the period from 7 August to 21 September 2003. The observation area was located about 50-100km landward of the southern Kuril trench where the Pacific plate is subducted toward Hokkaido island. The main shock occurred on 26 September 2003, just several days after this 50-days observation by OBS. Until this big earthquake, the seismic activity in this area has been extremely low in contrast with the adjacent trench areas. No big earthquake has occurred since the 1952 Tokachi-oki earthquake (M8.2). From the phase-reading data, 186 micro- and ultra micro-earthquakes were located in the regular seismic active zones. The b-value of 0.82 from the earthquakes with magnitude from -0.6 to 2.9 could support the fore-shocks of the 2003 Tokachi-oki earthquake. Several interesting phenomena were found in this study as follows. (1) Many clusters of events took place simultaneously in the surrounding source region after a short quiescence period of several days. (2) An enormous number of curious burst signals, which oscillated for only a few seconds, continued to appear at almost OBSs. In particular, at two OBSs DHH and DK being the shortest distance to the Kuril trench, over 3500 bursts of events with amplitudes of 10-7m/s were counted during the observation period. On the other side, OBS DD, which was close to the epicenter of main event and far away from the trench, around the beginning of September 2003, the rate of occurrence abruptly rose to over twice of the previous rate, which has kept the low rate until then. The start time of activation was almost the same time of the appearance of many widespread clusters of earthquakes. These results will be applied to a research project of the great earthquakes occurring along the trenches.

著者

高橋 伝一 西野 実美

出版者

一般社団法人日本建築学会

雑誌

日本建築學會研究報告

巻号頁・発行日

no.51, pp.287-292, 1960-03