湖南小毛瓢虫属三新记述：鞘翅目：瓢虫科

本文记述小毛瓢虫属ＳｃｙｍｎｕｓＫｕｇｅｌａｎｎ小瓢虫亚属Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）Ｍｕｌｓａｎｔ三新种：枝角小瓢虫Ｓｓｙｍｎｕｓ（Ｐｕｌｌｕｓ）ｃｌａｄｏｃｅｒｕｓｓｐ．ｎｏｖ．,鞭丝小瓢虫Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）ｍａｓｔｉｇｏｉｄｅｓｓｐ．ｎｏｖ．,肾斑小瓢虫Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）ｎｅｐｈｒｏｓｐｉｕｌｓｓｐ．ｎｏｖ．。     

湖南小毛瓢虫属三新种记述(鞘翅目:瓢虫科)

本文记述小毛瓢虫属Ｓｃｙｍｎｕｓ　Ｋｕｇｅｌａｎｎ小瓢虫亚属Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）Ｍｕｌｓａｎｔ三新种：枝角小瓢虫Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）ｃｌａｄｏｃｅｒｕｓｓｐ．ｎｏｖ,鞭丝小瓢虫Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）ｍａｓｔｉｇｏｉｄｅｓ　ｓｐ．ｎｏｖ．,肾斑小瓢虫Ｓｃｙｍｎｕｓ（Ｐｕｌｌｕｓ）ｎｅｐｈｒｏｓｐｉｌｕｓ　ｓｐ．ｎｏｖ．。     

中国小毛瓢虫二新种记述(鞘翅目：瓢虫科)

中国小毛瓢虫二新种记述（鞘翅目：瓢虫科）任顺祥,庞雄飞（华南农业大学昆虫生态室广州５１０６４２）本文描述采自贵州和四川的小毛瓢虫属ＳｃｙｍｎｕｓＫｕｇｅｌａｎｎ小毛瓢虫亚属Ｓｃｙｍｎｕｓ（Ｓｃｙｍｎｕｓ）Ｋｕｇｅｌａｎｎ二新种。模式标本保存于华南农业...     

中国小毛瓢虫属三新种记述：鞘翅目：瓢虫科

本文描述了小毛瓢虫属３新种：采自云南的冠端小瓢虫Ｓｃｙｍｎｕｓ ｃｒｉｓｔｉｆｏｒｍｉｓ ｓｐ．ｎ．,以及采自的匙叶小瓢虫Ｓ．（Ｐ．）ｓｃａｌｐｒａｔｕｓ ｓｐ．ｎ．和凹叶小瓢虫Ｓ．（Ｐ．）ｓｃｒｏｂｉｃｕｌａｔｕｓ ｓｐ．ｎ．。模式标本存华南农业大学昆虫标本室,广州。     

新疆麦田瓢虫种类记述：鞘翅目：瓢虫科

本文记述了采自新疆麦田的瓢虫科昆虫１７种,其中包括１新种即塔城毛瓢虫Ｓｃｙｍｎｕｓ ｔａｃｈｅｎｇｉｃｕｓ Ｙｕ和１中国新记录即黄足小毛瓢虫Ｓ．ｐａｌｌｉｐｅｓ Ｍｕｌｓａｎｔ,并对一些种的种名和特征作了进一步的说明。     

中国小毛瓢虫属二新种记述

中国小毛瓢虫属二新种记述（鞘翅目：瓢虫科）虞国跃,庞雄飞（华南农业大学,广州５１０６４２）小毛瓢虫属Ｓｃｙｍｎｕｓ是一个世界性分布的大属,目前已知六百余种。我国的小毛瓢虫极为丰富,已知６７种（经厘订）,并不断有新种发现。这里描述的是其中的二个新种,模...     

广西食植瓢虫属五新种：鞘翅目：瓢虫科

本文记述采自广西的食植瓢虫属Ｅｐｉｌａｃｈｎａ５新种,即花端食植瓢虫Ｅｐｉｌａｃｈｎａ ａｎｔｈｏｄｅａ,ｓｐ．ｎｏｖ。,短叶食植瓢虫Ｅ．ｂｒａｃｈｙｌｏｄｂ,ｓｐ．ｎｏｖ。浪平食植瓢虫Ｅ．ｌａｎｇｐｉｎｇｅｎｓｉｓ,ｓｐ．ｎｏｖ．,靴管食植瓢虫Ｅ．ｏｃｒｅａｔａ,ｓｐ．ｎｏｖ．和管刺食植瓢虫Ｅ;ｓｉｐｏｎｅｃｈｉｎｕｌａｔａ,ｓｐ．ｎｏｖ．。     

中国隐胫瓢虫亚科Aspidimerinae的新种及新记录：（鞘翅目：瓢虫科）

本文记述了中国隐胫瓢虫亚科Ａｓｐｉｄｉｍｅｒｉｎａｅ３属３４种，其中包括１亲记录属：拟隐胫瓢虫属Ｐｓｅｕｄａｓｐｉｄｉｍｅｒｕｓ；１新记录种：棕环拟隐胫瓢虫Ｐｓｅｕｄａｓｐｉｄｉｍｅｒｕｓ ｌｏｍｂａｔｕｓ Ｈｏａｎｇ，１９８３和３新种：舌端隐势瓢虫Ｃｒｙｐｔｏｇｏｎｕｓ ｌｉｎｇｕｉｌａｔｕｓ，曲斑隐势瓢虫Ｃｒｙｐｔｏｇｏｎｕｓ ｆｒａｃｔｅｍａｃｕｌａｔｕｓ及短叶隐势瓢虫Ｃｒｙｐｔｏｇｏｎｕｓ     

云南丽江地区华山松上瓢虫种类记述(鞘翅目:瓢虫科)

本文记述的１８种瓢虫采自云南丽江的华山松上,其上有球蚜（Ｐｉｎｅｕｓｓｐ．） 寄生。包括１个新种——华山松小瓢虫Ｓｃｙｍ ｎｕｓ（Ｐｕｌｌｕｓ） ｈｕａｓｈａｎｓｏｎｇ, ｓｐ． ｎｏｖ． 和１个中国新记录种——团聚丽瓢虫Ａｄａｌｉａ ｃｏｎｇｌｏｍｅｒａｔａ （Ｌ．）, ３种鉴定到属或亚属。其中的１４种瓢虫同时采自铁杉,其上有铁杉球蚜（Ａｄｅｌｇｅｓ ｔｓｕｇａｅ）寄生。新种华山松小瓢虫Ｓｃｙｍ ｎｕｓ（Ｐｕｌｌｕｓ） ｈｕａｓｈａｎｓｏｎｇ （图１）体长２．６５ｍ ｍ ,体宽１．８０ｍ ｍ 。头黑色,口器及触角红褐色;前胸背板黑色;小盾片黑色;鞘翅红褐色。从头、前胸背板和小盾片黑色而鞘翅红褐色,该种易与它种区分;而从外生殖器而言,它与弯端小瓢虫Ｓ． （Ｐ．） ａｃｃａｍｐｔｕｓ Ｐａｎｇ ｅｔＰｕ 相似,但新种阳基较纤细,第１腹板上的后基线弯曲度大拱形明显而区分。新种模式标本１９９７年９月２４日虞国跃采于云南丽江文笔山,存北京市农林科学院植保环保研究所。     

广西长崎齿瓢虫属二新种（鞘翅目：瓢虫科）

本文记述采自广西壮族自治区的长崎齿瓢虫属２新种,即弄岗崎齿瓢虫Ａｆｉｓｓｕｌａｎｏｎｇｇａｎｇｅｎｓｉｓ,ｓｐ．ｎｏｖ．和鸟喙崎齿瓢虫Ａ．ｏｒｎｉｔｈｏｒｒｈｙｎｃｈａ,ｓｐ．ｎｏｖ。模式标本除弄岗崎齿瓢虫Ａ．ｎｏｎｇｇａｎｇｅｎｓｉｓ（正模♂,配模♀和副模５♂４♀）保存在南京农业大学植保系外,其余标本保存在广西农科院植保所。     

First record of Lipaphis pseudobrassicae Davis (Hemiptera: Aphididae) and its association with predator insects, parasitoids and ants in kale (Cruciferae) in Brazil

This study describes the fauna of predator insects, parasitoids and ants associated with aphids on kale (Brassica oleracea L. var. acephala D.C.) in organic system. The aphid was identified as Lipaphis pseudobrassicae Davis, and this is the first record of the species attacking kale in Brazil. Primary parasitism by Diaeretiella sp. and Aphidius sp. and hyperparasitism by Aphydencyrtus sp., Alloxysta sp., Pachyneuron sp. and Syrphophagus sp. were observed. Twenty species of Coccinellidae were collected, and eight of them were observed in adult and larval stages attacking the aphid: Hyperaspis (Hyperaspis) festiva Mulsant, which was the most abundant (72.5% of all predator insects obtained), Cycloneda sanguinea (L.), Eriopis connexa Germar, Coleomegilla maculata DeGeer, Hippodamia convergens Guérin, Heterodiomus sp., Scymnus (Pullus) sp.1 and Scymnus (Pullus) sp.2. Aphidophagous Syrphidae larvae collected on leaves ofkale infested by L. pseudobrassicae belong to the species Allograpta exotica (Wiedemann) and Ocyptamus gastrostactus (Wiedemann). Larvae and pupae of Syrphidae were parasitized by Pachyneuron sp., Syrphophagus sp. and Diplazon laetatorius Fabricius. Larvae of Chrysopodes sp. were observed feeding on L. pseudobrassicae. Species of ants associated with the colony of this aphid were Ectatomma quadridens Fabricius and Pheidole sp.     

Bionomics of Scymnus (Pullus) louisianae J. Chapin (Coleoptera: Coccinellidae) as a predator of the soybean aphid,Aphis glycines Matsumura (Homoptera: Aphididae)

A field population of Scymnus louisianae Chapin (Coccinellidae) was found attacking soybean aphids, Apis glycines Matsumura (Aphidae), a pest recently introduced into Kentucky. This coccinellid had not previously been found in Kentucky. A greenhouse population of S. louisianae was established and its predation on A. glycines studied under laboratory conditions. Total time to develop from egg to adult was about 20 d. About 70% of immatures survived to adulthood and they consumed approximately 100 aphid nymphs per beetle larva during the beetle's four larval instars. Adults lived for an average of 47 d (mated males) and 63 d (mated females) and, during their total adult lifetime, mated males consumed an average of 665 nymphs and mated females consumed 1261 nymphs. All developmental times and predation rates were comparable to those reported for other aphidophagous Scymnus spp. which, in conjunction with reports that Scymnus spp. are effective predators of cotton aphids, Aphis gossypii Glover, suggests that S. louisianae is a potentially important predator of A. glycines in the southern United States.     

Foraging ecology of aphidophagous predators against Aphis punicae Passerini

Foraging behaviour of three aphidophagous predators, viz., Cheilomenes sexmaculata (Fabricius), Scymnus sp. (Coleoptera: Coccinellidae) and Paragus serratus (Fabricius) (Diptera: Syrphidae) on prey Aphis punicae Passerini (Homoptera: Aphididae) was studied in the laboratory at Indian Institute of Horticultural Research, Bangalore (12 degrees 58' N; 77 degrees 35'E) during 2002-03 to understand the predation dynamics. The foraging studies of grubs of C. sexmaculata and Scymnus sp. on A. punicae revealed that the distance travelled to reach the food (aphids) was negatively correlated with the feeding time of prey (r = -0.434 and -0.743, respectively). The time taken for second encounter was positively correlated with feeding time in case of both C. sexmaculata (r = 0.715) and P.serratus (r = 0.641). The time taken for first encounter of prey by Scymnus sp. showed negative correlation with the feeding time (r = -0.9491) and positive correlation with the distance traveled by the predator to reach the food (r = 0.620). The foraging behavioural studies of syrphid, P. serratus on A. punicae showed that the time taken for first encounter of prey was positively correlated with both the feeding time (r = 0.467) and the distance travelled by the syrphid to reach the food (r = 0.485). The time taken for first encounter of prey also showed significant positive correlation with the search time of the prey (r = 0.384).     

浙江小毛瓢虫属三新种记述（鞘翅目：瓢虫科）

本文采自浙江省瓢虫科小毛瓢虫属３新种：长爪小毛瓢虫,临安小瓢虫,倒齿小瓢虫。     

黑襟毛瓢虫对棉蚜的数值反应

本文研究了不同龄期及不同发育期的黑襟毛瓢虫在不同食蚜量(生物量)下的发育速率,增长速率,存活率及生殖率。主要结果如下: (1)讨论了下模型(Beddinton et al.,1976)的隐含假说: 1/d=a(KaNT/1 aT _(?)N-B) (1) 其中最主要一点就是该模型没有考虑到在(食物摄入量)常数B邻域内发育速率的非连续性。为了描述此性质,我们提出了以下通式: 式中:1/d是捕食者发育速率,X是捕食者摄取的生物量,N为猎物密度。F(X(N))为一可以是线性或其他形状的函数。笔者认为发育速率在B领域的不连续性是数值反应的一个普遍规律。(2)黑襟毛瓢虫幼虫取食量与增长率的关系结果表明,三、四龄幼虫在取食量较低时能以低于上一龄期初的体重(负增长率)进入下一龄期或虫态。(3)二、三龄幼虫有很强的耐饥性,但一、四龄幼虫对饥饿较敏感(图5)。第i—1龄幼虫的取食量能影响第i龄时的存活率及发育速率(表2)。(4)幼虫及成虫的取食率对生殖均有重要影响,但取食量对卵重及其卵的孵化率影响不显著。     

Species abundance patterns of coccinellid communities associated with olive,chestnut and almond crops in north‐eastern Portugal

• 1 The patterns of abundance of coccinellid species associated to the main agricultural tree crops of north‐eastern Portugal namely olive, chestnut and almond were studied.
• 2 During three to four crop seasons, eight olive, five chestnut and one almond groves were sampled. In each grove, five samples were collected from 10 randomly selected trees using the beating technique and the coccinellids were counted and identified to species. Principal component analysis was used to establish associations among crop and coccinellid species.
• 3 The mean species richness was higher in chestnut, with 15 ± 3.81 species/grove, followed by olive and almond, with 13 ± 2.76 and 10 ± 2.97 species/grove, respectively. Scymnus mediterraneus was the most abundant species in olive and almond, whereas Scymnus interruptus was dominant in chestnut. Brumus quadripustulatus, Chilocorus bipustulatus, Scymnus subvillosus, S. mediterraneus and Rhyzobius chrysomeloides were associated with olive, whereas S. interruptus, Coccinella septempunctata and Adalia decempunctata were associated with chestnut and Hippodamia variegata, Oenopia conglobata and Adalia bipunctata with almond. Both Stethorus punctillum and Scymnus apetzi species were similarly associated with chestnut and almond.
• 4 The differences in coccinellid communities could have been related to the kind of prey item present in the different trees. This knowledge can be used to develop integrated pest management programmes that encourage greater natural enemy biodiversity in agroecosystems.

     

Assessment of fennel aphids (Hemiptera: Aphididae) and their predators in fennel intercropped with cotton with colored fibers

The fennel aphid, Hyadaphis foeniculi (Passerini) (Hemiptera: Aphididae) is a major pest of fennel, Foeniculum vulgare Miller in northeast region of Brazil. We hypothesize that intercropping can be used as an alternative pest management strategy to reduce aphid yield loss in fennel. Thus, we investigated the severity of fennel plant damage in relation to infestation by the fennel aphid and predation by Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae) (spotless lady beetle), green lacewing, Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae), and Scymnus spp. (Coleoptera: Coccinellidae) in sole fennel plots and plots of fennel intercropped with cotton with colored fibers. The fennel aphid populations in nontreated plots were significantly larger in sole fennel plots than in intercropped plots. The highest densities of C. sanguinea, green lacewings and Scymnus spp., associated with the suppression of fennel aphid populations was found in fennel in the intercropping systems. Fennel aphids reduced the fennel seed yield by 80% in the sole fennel plots compared with approximately 30% for all intercropping systems. The results obtained in this research are of practical significance for designing appropriate strategies for fennel aphid control in fennel-cotton intercropping systems. In summary, intercropping fennel with cotton with colored fibers apparently promoted biocontrol of fennel aphid in fennel.     

Defensive behaviour of the wheat aphid,Schizaphis graminum (Rondani) (Hemiptera: Aphididae), against Coccinellidae

An account is given of the behaviour of the wheat aphid, Schizaphis graminum, in response to attacks by two coccinellid predators Scymnus morelleti and Exochomus concavus. Various responses are described and their influence on predator efficiency is investigated.