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1.
寄生美国白蛾的啮小蜂一新种(膜翅目,姬小蜂科)   总被引:1,自引:2,他引:1  
记述了从美国白蛾蛹中养出的姬小蜂科啮小蜂亚科1新种,即白蛾短角啮小蜂Tetrastichus litoreus sp.nov.。本种群集内寄生于美国白蛾蛹中,以老熟幼虫在寄主蛹中越冬,成蜂的雌雄性比为5:1。新种的模式标本保存于中国林业科学研究院昆虫标本馆。  相似文献   

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欧米啮小蜂属Oomyzus Rondani异名有;Tetrastichus Haliday;Aprostocetus Westwood,本文记述2新种,标本均采自湖北省,存于江西农业大学植保系,寄主均为草蛉蛹。  相似文献   

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利用生命表评价白蛾周氏啮小蜂对美国白蛾的控制作用   总被引:10,自引:0,他引:10  
魏建荣  杨忠岐  苏智 《昆虫学报》2003,46(3):318-324
为了研究白蛾周氏啮小蜂对侵入性害虫-美国白蛾的控制作用,在山东省烟台市美国白蛾发生区,选择美国白蛾发生程度中等的两块样地,一块样地作为释放白蛾周氏啮小蜂防治美国白蛾的防治区,另一块样地作为对照区。应用生命表技术,连续2年共4代对美国白蛾种群数量进行定点观察。防治区每代美国白蛾在化蛹初期和化蛹盛期各放蜂1次,即每代美国白蛾共放蜂2次。将2年的第1代和第2代观测数据分别综合平均,制成4个生命表。结果表明,在放蜂防治区,第1代和第2代美国白蛾的种群趋势指数(I)分别为0.29和0.14,说明下代美国白蛾种群数量将急剧下降;放蜂区的I值显著小于对照区的8.74和4.48。生命表研究结果清楚地表明,通过人工释放白蛾周氏啮小蜂能够达到良好的控制美国白蛾的效果。  相似文献   

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描述了寄生梨茎蜂Janus piri Okamoto et Muramatsu的一种重要天敌新种--梨茎蜂啮小蜂Tetrastichus janusi sp.nov.,该种属小蜂总科姬小蜂科啮小蜂属.新种群集外寄生于梨茎蜂幼虫,一般1头寄主上寄生4~14头个体,雌雄性比为2.6∶1.0.一年发生两代.在越冬代梨茎蜂幼虫中的寄生率达44.7%.新种在梨茎蜂的生物防治中具有良好的应用前景.这是啮小蜂亚科在国内外首次发现寄生于茎蜂科害虫.新种模式标本保存于中国林业科学研究院昆虫标本馆.  相似文献   

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本文用图文简要记述了从美洲大蠊卵鞘中育出的浅沟长尾啮小蜂Aprostocetus asthenogmus (Waterston)的形态特征.这是该蜂在我国的首次报道,有望今后用于蜚蠊的生物防治.  相似文献   

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本文对艾菲跳小蜂属Aphycus(膜翅目Hymenoptera:跳小蜂科Encyrtidae)的2种进行了研究,标本均采自中国四川省。发现并描述了一新种——康定艾菲跳小蜂Aphycus kangdingensis sp.nov.,另一种为札幌艾菲跳小蜂Aphycus sapporoensis(CompereAnnecke)。研究标本保存于中国科学院动物研究所。  相似文献   

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寄生于美国白蛾幼虫的茧蜂二新种(膜翅目:茧蜂科)   总被引:3,自引:0,他引:3  
记述了寄生于美国白蛾幼虫的2种茧蜂新种:白蛾孤独长绒茧蜂Dolichogenidea singularis Yang et You,sp.nov.,单个内寄生于寄主2-3龄幼虫:白蛾聚集盘绒茧蜂Cotesia gregalis Yang et Wei,sp.nov.,群集内寄生于寄主老龄幼虫,这2种寄生蜂的自然寄生率均为6%左右,在生物防治上具有良好的应用前景。  相似文献   

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1985年春季,作者与本院81级学生黄飞在调查美国白蛾Hyphantria cunea(Drury)的天敌昆虫时,从该害虫的蛹中养出了一种小蜂。这种小蜂寄生率很高,达80%以上。而且个体数量很大,一头美国白蛾的蛹中出蜂大多为200头以上,最高达306头。有些科研人员及防治工作者在美国白蛾的研究和防治中也采到或养出了这种小蜂。经  相似文献   

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首次报道了小蜂科细尾小蜂属Megalocolus Kriby,1883在中国的分布,描述采自云南、广西、重庆及上海的1新种,中华细尾小蜂Mealocolus chinensis sp.nov.。模式标本保存于中国科学院动物研究所动物标本馆。  相似文献   

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The life history and development of Tetrastichus sp. parasitizing fallwebworm pupa in Korea were studied. The mean lifetime fecundity was 94.7 with a maximum of 125, and the portion of female progeny averaged 90.3%. A male and a female lived for an average of 19.8±4.5 and 21.7±4.2 days, respectively. The duration of development for each stage was as follows: egg, 2 d; the 1st instar larva, 2±1 d; the 2nd instar larva, 2±1 d; the 3rd instar larva, 3±1 d; the 4th instar larva, 6±2 d; and pupa, 8±2 d. Total developmental duration from hatching of the larva to adult emergence required 21.1±3.7 d, and females took 1–2 days more than males in the incubator (28°C, 70% RH, and 16:8 LD).  相似文献   

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美国白蛾Hyphantria cunea Drury是我国唯一一种被农业、林业共同列为检疫对象的害虫。本论文通过2010与2011年室内测定和室外调查的一系列研究表明,美国白蛾蛹在不同低温处理下随着处理时间的延长存活率逐渐降低。其中,-10℃下处理30 h后几乎没有越冬蛹存活,-15℃下处理3 h后越冬蛹的存活率低于5%,-20℃处理25 min后越冬蛹几乎没有羽化为成虫的个体。0℃低温处理对越冬蛹的低温存活率有重要影响,且随着0℃下处理的时间长短而发生变化,在0℃下处理时间越长则在-10℃下存活率越高。在0℃下处理150 min以后,存活率随处理时间的延长差异不显著。  相似文献   

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Nitric oxide synthase (NOS) gene has been partially sequenced from Hyphantria cunea and compared with those already determined from insects. Hyphantria cunea NOS possesses putative recognition sites for co‐factors heme, BH4, CaM, FMN, FAD, and NADPH common to NOS. The deduced amino acid sequence of H. cunea NOS cDNA showed 70.3% identity to Manduca sexta NOS and 57.6–69.5% identity to NOS sequences from other insects. Nitric oxide synthase is expressed in all tissues of H. cunea, except in hemocytes. The NOS expression in midgut, fat body, epidermis, and Malpighian tubule strongly increased against Gram‐positive and Gram‐negative bacterial infection. These results suggest that NOS may play an important role in insect defense system against bacterial infection.  相似文献   

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The nonparalyzing venoms of two unrelated parasitic wasps, Eulophus larvarum and Clinocentrus gracilipes, in separate ways cause delayed yet well-defined arrests in their hosts' development, apparently by disrupting events normally under endocrine control. The venom of E. larvarum (for which species host acceptance and oviposition behavior is described) prevents apolysis in its host after a depressed feeding period. The venom employed by C. gracilipes switches the host to a pharate pupal stage irrespective of its larval instar.  相似文献   

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Yolk proteins (YP1, YP2, and YP3) of the fall webworm, Hyphantria cunea, are of relatively low molecular weight. Yolk protein-2 (YP2) was purified from gel slices and by KBr density gradient ultracentrifugation followed by ion exchange chromatography. YP2 is composed of one subunit with a molecular weight of 35.5 kDa. YP2 contains neutral lipids (diacylglycerol and triacylglycerol) and phospholipids (phosphatidylcholine and phosphatidylethanolamine). The neutral lipids are largely composed of lauric acid and palmitoleic acid. YP2 contains relatively large amounts of glutamic acid and aspartic acid but small amounts of tyrosine, phenylalanine, and methionine. YP2 is a vitellin (Vn) synthesized by the fat body. Vitellogenin-2 (Vg2), the precursor of YP2, is present in very small amounts in the hemolymph. Lipophorin and storage protein also are found in the ovary of H. cunea, and these proteins do not immunologically cross-react with YP2. YP2 is detected in first instar larvae but completely disappears during the second instar, indicating that YP2 is intensively utilized during postembryonic development. Anti-YP2 antibodies cross-react with ovarial extracts of Bombyx mori but not with those of insects from other orders such as Cletus schmidti (Hemiptera), Lucilia illustris (Diptera), Anechura japonica (Dermaptera), Periplaneta americana (Dictyoptera), and Ducetia japonica (Orthoptera). © 1995 Wiley-Liss, Inc.  相似文献   

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本文报导与竹类害虫有关的6种跳小蜂。长缘刷盾跳小蜂Cheiloneurusclaviger及优赛跳小蜂Eusemioncornigerum,寄生竹巢粉蚧Nesticoccussinensis的初寄生者花翅跳小蜂Microterysspp.;瓢虫隐尾跳小蜂Homalotylusflaminius,寄生黑缘光瓢虫Exochomus(Xanthocorns)nigromarginatus;白胫短缘跳小蜂Zaommaeriococi(Tachikawa)中国新记录,寄生竹巢粉蚧的初寄生者花翅跳小蜂;四斑长索跳小蜂AnagyrusquadrimaculatusXuetHe,sp.nov,寄生竹绒粉蚧Eriococcustransversus;长脉卵跳小蜂OoencyrtuslongivenosusXuetHe,sp.nov,寄生竹卵圆蝽Hippotiscusdorsalis。标本及模式标本保存在浙江农业大学寄生蜂标本室。  相似文献   

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