著者

渡辺 恭平 郷右近 勝夫 前田 泰生

出版者

一般社団法人 日本昆虫学会

雑誌

昆蟲.ニューシリーズ (ISSN:13438794)

巻号頁・発行日

vol.26, no.2, pp.49-57, 2023-06-25 (Released:2023-06-28)

参考文献数

14

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島根大学に標本が収蔵されている日本産コンボウヤセバチ類の寄主,訪花植物および分布を報告した.オオコンボウヤセバチGasteruption japonicum Cameron, 1888の寄主としてスミスメンハナバチHylaeus(Nesoprosopis)floralis(Smith, 1873),ヨーロッパメンハナバチH.(N.)pectoralis Förster, 1871,ニッポンメンハナバチH.(N.)transversalis Cockerell, 1924)(ムカシハナバチ科)およびオオジガバチモドキTrypoxylon malaisei Gussakovskij, 1933(ギングチバチ科)を初めて記録した.ヒメコンボウヤセバチG. boreale(Thomson, 1883)の寄主としてスミスメンハナバチとニッポンメンハナバチを初めて記録した.ミナミヒメコンボウヤセバチ(新称)Gasteruption sinicola(Kieffer, 1924)を西表島産の標本に基づき日本から新たに記録した.日本から5例目となるクボミコンボウヤセバチG. oshimense Watanabe, 1934を島根県から記録した.12科19種の植物を日本産コンボウヤセバチ科の訪花植物として記録した.日本産コンボウヤセバチ科の生態について考察した.

著者

前田 泰生 町田 禎之 北村 憲二

出版者

一般社団法人 日本昆虫学会

雑誌

昆蟲.ニューシリーズ (ISSN:13438794)

巻号頁・発行日

vol.10, no.2, pp.33-46, 2007-06-25 (Released:2018-09-21)

参考文献数

44

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Biology of Elenchus japonicus (Esaki et Hashimoto) was studied by rearing host delphacid planthoppers, Sogatella furcifera (Horvath) in 2 types of vials (Diameter: 20mm; Length: 10 and 18cm) in 1985. The 1st instar larvae of E. japonicus mostly preferred the 2nd to 5th instar larvae of S. furcifera as hosts. The duration of emergence of the 1st instar larvae from the maternal body continued for 12 hours, and these larvae survived up to 15hrs. The 1st instar larvae gnawed with their mandibles the inter-segments between either ventral or dorsal terga to invade the host's body, but position of the inter-segments used was not fixed. The development of immatures in host bodies differed slightly, depending on the host stages into which the 1st instar larvae invaded. The larval development reared at 28℃ was the fastest in the 5th instar larvae of hosts, spending 10 days from invasion of the 1st instar larva to extrusion of the last larva in female stylopids, and for 13 days from invasion of the 1st instar larva to emergence of adults in male stylopids. Both sexes of most stylopids extruded their cephalothoraces at definite positions between the 7th and 8th terga of either side of the pleural membrane of adult hosts, irrespective of their sexes, when they had parasitized singly. However, other stylopids, except for the individual which extruded at a definite position, could extrude at aberrant positions, when they superparasitized. The number of stylopids parasitized/host averaged 1.2 and up to 4 maximum. Sex ratio was slightly male-biased (0.62, 179/288). The mean value of the egg complement of female stylopids that parasitized singly female hosts was 1,237±194 (N=19). However, the values were variable, depending on the host species, sex of hosts, number of stylopids per host, and host generation, reflecting that the size of female stylopids was presumably affected by these factors.

著者

屈 達才 前田 泰生 郷原 匡史 中塚 硬三 北村 憲二

出版者

日本昆虫学会

雑誌

昆蟲.ニューシリーズ (ISSN:13438794)

巻号頁・発行日

vol.5, no.4, pp.121-141, 2002

参考文献数

42

被引用文献数

1

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Three species of astigmatid mites which infest mason bees, i.e., Chaetodactylus hirashimai, C. nipponicus and Tortonia sp., are known to occur in Japan. Two of them, C. nipponicus and T. sp. are sympatrically distributed in central and northern Japan. They are cleptoparasites of Osmia cornifrons, which is utilized as a pollinator of apples. The invasion/infestation patterns of these mites were studied through a survey conducted at 24 apple orchards in various localities during winter between 1999 and 2001. A population of O. cornifrons was reared in Sendai City, northern Japan, in spring of 1999 so as to analyse the synchronization between invasion/infestation of mites and nesting activity of host bees. As overwintering stages of C. nipponicus, phoretic and cyst-like deutonymphs were found together in the same cells, while 5 stages (larvae, protonymphs, tritonymphs, adults and phoretic deutonymph) were confirmed to hibernate in Tortonia sp. The cyst-like deutonymphs were absent in the latter species. In C. nipponicus, the percentage of phoretic deutonymphs was extremely high (up to 99.6% per host cell), while in T. sp. was lower (6.6% in total). The life type of these 2 mite species is regarded as phoretic- and dweller-like, respectively. The difference of their life types between 2 mite species are enable the partitive use of the pollen-mass stored in the same nests. The following features, regarding to the invasion/infestation patterns, were recognized. 1) Mostly, the first nests made in tubes were infested by both species of mites. The number of cells infested by C. nipponicus extended up to 9 cells, but usually the inner ones were apt to be infested. On the other hand, infested cells were found throughout nest tubes in T. sp.; 2) Distribution and numbers of dead cell contents in a nest by infestation of mites differed between 2 mite species. Only 1-3 cell contents were killed in C. nipponicus, and none killed in T. sp.; 3) Prior to feed on the stored pollen-mass, both species of mites killed hosts. However, they were able to kill hosts of which stages were from egg to early third instar larva. To kill host eggs, it was needed more than 50 adult mites. Those hosts that escaped from slaughter survived and formed normal cocoons; 4) Coinhabiting with C. nipponicus and T. sp. in the same host cell was less frequently occurred (7.1% in total). In these cells, the individual ratio of C. nipponicus was always higher than that of T. sp. The 5 overwintering stages, except phoretic deutonymph, in Tortonia sp. were not all in diapause. These stages began to develop into the next stages sooner, when new food was given under warm temperature. The phoretic deutonymphs of both mite species activated their development by clinging to host bee bodies in both mite species. The cyst-like deutonymphs of C. nipponicus developed into the tritonymphs when subjected them to the scent of host bees.

著者

奥 俊夫 前田 泰生 小林 尚

出版者

日本草地学会

雑誌

日本草地学会誌 (ISSN:04475933)

巻号頁・発行日

vol.18, no.3, pp.177-182, 1972-10-25

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盛岡市下厨川において,ラジノクローバ単播,およびラジノクローバ・オーチャードグラス混播草地におけるウリハムシモドキの,越冬後の密度減少過程を5年間にわたって調査し,次の結果を得た。1.卵期から幼虫中期までに約70%の密度低下があり,4月末から5月前半にかけての降雨が皆無に近い年にはさらに密度が低下した。2.幼虫中期から成虫の羽化までの間には,普通には密度の変化がとぼしいが,大発生の翌年から単播区に黄きよう菌による死亡率が非常に高まり,その後しだいに寄生率が低下した。3.成虫期間中の密度低下のうち,もっとも顕著であったのは,大発生時の過密による移動であった。4.成虫に対するヤドリバエ一種の寄生率は成虫末期に高まったが,10数%をこえず,また中期以前の寄生率は非常に低かった。