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Registros recuperados: 9
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Avoidance of ladybird trails by an aphid parasitoid Aphidius ervi: active period and effects of prior oviposition experience OAK
Nakashima, Yoshitaka; Senoo, Nozomu; 仲島, 義貴.
http://www.blackwell-synergy.com/loi/eea
Palavras-chave: Aphidius ervi; Coccinella septempunctata; Chemical marker; Experience; Intraguild predation; Predator avoidance; Aphididae; Coleoptera; Coccinellidae; Hemiptera.
Ano: 2003 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/807
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Cage evaluation of augmentative biological control of Thrips palmi with Wollastoniella rotunda in winter greenhouses OAK
Nakashima, Yoshitaka; Uefune, Masayoshi; Tagashira, Eiko; Maeda, Seiko; Shima, Katsuya; Nagai, Kazuya; Hirose, Yoshimi; Takagi, Masami.
Cage trials of an anthocorid predator, Wollastoniella rotunda Yasunaga et Miyamoto, as a biological control agent of Thrips palmi Karny were conducted in Fukuoka, Japan, under winter greenhouse production conditions. Females of W. rotunda were released on caged eggplants, and placed in two greenhouses on 27 October. The development, population growth, and effectiveness of W. rotunda were observed until early March. Results from the cage trials showed that W. rotunda successfully developed, reproduced, and suppressed T. palmi populations under the conditions found in winter greenhouses. During the experiment, one full generation and a second generation of adult predators occurred. The T. palmi population which was exposed to predators remained at a low...
Palavras-chave: Reproductive diapause; Photoperiod; Development; Winter; Wollastoniella rotunda; Orius; Biological control; Thrips palmi; Solanum melongena; Dicyphus tamaninii; Frankliniella occidentalis; Piocoris varius.
Ano: 2004 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/808
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Chemically mediated intraguild predator avoidance by aphid parasitoids: Interspecific variability in sensitivity to semiochemical trails of ladybird predators OAK
Nakashima, Yoshitaka; Birkett, Michael A.; Pye, Barry J.; Powell, Wilf; 仲島, 義貴.
The avoidance responses of aphid parasitoids with varying host ranges (Aphidius eadyi, Aphidius ervi, and Praon volucre) to chemical trails deposited by intraguild predatory ladybirds, Coccinella septempunctata and Adalia bipunctata, were investigated. Females of all three parasitoid species avoided leaves previously visited by C. septempunctata or A. bipunctata adults. The avoidance responses shown by the two Aphidius species were stronger to trails of C. septempunctata than to those of A. bipunctata. However, P. volucre avoided trails of both ladybird species to a similar degree. Dose responses of these three parasitoid species to the hydrocarbons n-tricosane (C23H48), n-pentacosane (C25H52), and n-heptacosane (C27H56), which are components of the trails...
Palavras-chave: Intraguild predation; Predator avoidance; Trail; Oviposition decision; Host range; Habitat similarity; Dose response.
Ano: 2006 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/810
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Flexible use of patch marks in an insect predator: effect of sex, hunger state, and patch quality OAK
Nakashima, Yoshitaka; Teshiba, Mayumi; Hirose, Yoshimi; 仲島, 義貴.
1. Patch marks that allow the subsequent avoidance of marked areas may be used by small animals to increase foraging efficiency. This study is the first to demonstrate the presence of a patch-marking system in insect predators. Furthermore, the marking system is found only in females, and factors such as hunger state and patch quality play a key role in determining whether a female will re-investigate a self-marked patch. 2. Females of the insect predator Orius sauteri avoided areas where the female itself had searched previously but did not avoid areas searched by conspecific females when deprived of prey for 24 h. There was no evidence that males use such a patch-marking system, indicating the presence of a sex difference in patch-mark use. 3. Females...
Palavras-chave: Anthocoridae; Foraging efficiency; Patch mark; Patch time; Physiological state; Prey availability; Sex difference.
Ano: 2002 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/805
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Sex differences in foraging behaviour and oviposition site preference in an insect predator, Orius sauteri OAK
Nakashima, Yoshitaka; Hirose, Yoshimi; 仲島, 義貴.
The effects of patch quality on the foraging behaviour of an anthocorid predator Orius sauteri (Poppius) were compared between sexes. Prior experience in patches was also studied to determine whether this was a factor affecting oviposition decisions. Patch quality affected patch residence time differently for the two sexes; females stayed much longer in a patch with prey (60 Thrips palmi larvae) than a patch without prey, while males did not remain in any patch for extended periods. Most of the females remained in or moved to patches with prey, whereas males dispersed, irrespective of patch quality. Both females released in patches with prey and females released in patches without prey deposited more eggs per hour in patches with prey than in patches...
Palavras-chave: Anthocoridae; Experience; Mate search; Orius sauteri; Oviposition; Patch time.
Ano: 2003 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/806
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Temporal and within-plant distribution of the parasitoid and predator complexes associated with Acyrthosiphon pisum and A. kondoi (Homoptera : Aphididae) on alfalfa in Japan OAK
Nakashima, Yoshitaka; Akashi, Masako.
Seasonal abundance and within-plant distribution of Acyrthosiphon spp. and their natural enemies were investigated on alfalfa in Obihiro, Hokkaido, Japan in 2001. Densities of A. pisum and A. kondoi peaked in early June. Coccinellid and syrphid predators appeared to respond to aphid numbers and were synchronized with aphid populations. Two species of braconid (aphidiine) parasitoids (Aphidius ervi and Praon barbatum) were collected. Parasitism rates for each aphid species were variable through the season, but the estimated number of parasitized aphids reached a peak at the same time as overall aphid densities. After the first harvesting of alfalfa (14 June) aphid densities became very low, and coccinellid and syrphid predators were not found. In contrast...
Palavras-chave: Aphidius ervi; Coccinella septempunctata; Hyperparasitoid; Intraguild interaction; Praon barbatum.
Ano: 2005 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2533
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The role of semiochemicals in the avoidance of the seven-spot ladybird, Coccinella septempunctata, by the aphid parasitoid, Aphidius ervi OAK
Nakashima, Yoshitaka; Birkett, Michael A.; Pye, Barry J.; Pickett, John A.; Powell, Wilf; 仲島, 義貴.
The role of semiochemicals in mediating intraguild interactions between the seven-spot ladybird, Coccinella septempunctata, and the aphid parasitoid, Aphidius ervi, was investigated. Female parasitoids avoided leaves visited by C. septempunctata adults and larvae during the previous 24 hr. Ethanol extracts of C. septempunctata adults and larvae also induced avoidance responses by A. ervi. Two of the hydrocarbons identified by gas chromatography ( GC) and coupled GC-mass spectrometry (GC-MS), n-tricosane (C23H48), and n-pentacosane (C25H52), when tested individually at levels found in the adult extract, induced avoidance by A. ervi. Further investigation of the larvae extract, and footprint chemicals deposited by adults in glass Petri dishes, confirmed the...
Palavras-chave: Intraguild predation; Predator avoidance; Trail; Oviposition decision; Biological control; N-tricosane; N-pentacosane.
Ano: 2004 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/809
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ヒメジンガサハナカメムシの発育と繁殖におけるミナミキイロアザミウマとカンザワハダニの餌としての適合性 OAK
上船, 雅義; 仲島, 義貴; 田頭, 栄子; 永井, 一哉; 広瀬, 義躬; 高木, 正見; Uefune, Masayoshi; Nakashima, Yoshitaka; Tagashira, Eiko; Nagai, Kazuya; Hirose, Yoshimi; Takagi, Masami.
ヒメジンガサハナカメムシの発育と繁殖に対するミナミキイロアザミウマとカンザワハダニの餌の適合性を明らかにするため,それぞれの餌種を与えた場合の本種幼虫の生存率と発育期間,雌成虫の寿命と産卵数を比較した.ミナミキイロ1齢幼虫や2齢幼虫を与えた場合,本種1齢幼虫は発育できたが,ミナミキイロ雌成虫を与えた場合,ほとんど発育できなかった.一方,カンザワハダニは苦虫だけでなく雌成虫を餌として発育可能で,本種1齢幼虫の好適な餌であった.加齢にともない餌の違いが及ぼす影響は小さくなり,ヒメジンガサハナカメムシ5齢幼虫の生存率と発育期間,雌成虫の寿命と産卵数は,餌の種類の違いによる影響は受けなかった.従って,カンザワハダニもミナミキイロと同様にヒメジンガサの発育や繁殖に対して餌適合性が高いと考えられ,ヒメジンガサはこれら2種の害虫に対する天敵資材としての利用可能性があることが示唆された. Effects of the prey species Thrips palmi and Tetranychus kanzawai and their stages on the development and reproduction of the anthocorid predator, Wollastoniella rotunda, were investigated under laboratory conditions. When offered first or second instar larvae of T. palmi, first instar nymphs of W. rotunda developed into second instars; however, when offered adult T....
Palavras-chave: Wollastoniella rotunda; Thrips palmi; Tetranychus kanzawai; Prey suitability; Biological control.
Ano: 2008 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2585
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誘引剤を用いた寄生蜂によるアプラムシ類の生物的防除技術の開発 OAK
仲島, 義貴; Nakashima, Yoshitaka.
平成17年度 Ⅰ.基盤研究部門
Ano: 2008 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2580
Registros recuperados: 9
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