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Boppré, M. Et Al. (1994): Summary
Zonocerus and Chromolaena in West Africa A chemoecological approach towards pest management M. Boppré, O. W. Fischer Institute of Forest Zoology, University of Freiburg i.B. Summary The variegated grasshopper, Zonocerus variegatus (L.) (Pyrgomorphidae), is a polyphagous African grasshopper. In parts of West Africa its dry-season population has reached pest status, apparently in coincidence with the spread of the introduced Siam weed, Chromolaena odorata (L.) K. & R. (Asteraceae: Eupatoriae), which, however, is not a food plant for Zonocerus. Knowledge of pharmacophagous utilisation of pyrrolizidine alkaloids (PAs) by Zonocerus elegans has suggested that flowers of Chromolaena which are attractive for and consumed by Zonocerus variegatus in a special manner do not have a nutritional function but rather serve solely as a PA-source. Field studies demonstrate that Z. variegatus is attracted to various PA-containing plants more strongly than to Chromolaena flowers, and pure PAs are also effective lures. In conclusion, Zonocerus seems to enjoy a non-nutritional association with Chromolaena which only provides PAs. These secondary plant compounds are stored and chemically protect the grasshoppers and particularly their diapausing eggs from predation and parasitism, and thus cause increased fitness and influence the population density of dry-season Zonocerus. Our ongoing behavioural, physiological and chemical studies strongly support this hypothesis and provide an example of the hidden and unpredictable effects which the introduction of a foreign plant can have on population dynamics of a native insect species and on (agro-)ecosystems. This knowledge on the pharmacophagous behaviour and its chemoecological context leads us to develop a PA-based bait to poison Zonocerus and/or infect the insects with pathogens and thus control them specifically in a way harmless to man and environment. -
Lubber Grasshoppers, Romalea Microptera (Beauvois), Orient to Plant Odors in a Wind Tunnel
J. B. HELMS, C. M. BOOTH, J. RIVERA, J. A. SIEGLER,Journal S. WUELLNER,of Orthoptera D. W. Research WHITMAN 2003,12(2): 135-140135 Lubber grasshoppers, Romalea microptera (Beauvois), orient to plant odors in a wind tunnel JEFF B. HELMS, CARRIE M. BOOTH, JESSICA RIVERA, JASON A. SIEGLER, SHANNON WUELLNER, AND DOUGLAS W. WHITMAN 4120 Department of Biological Sciences, Illinois State University, Normal, IL 61790. E-mail: [email protected] Abstract We tested the response of individual adult lubber grasshoppers in a wind tion, palpation, and biting often increase in the presence of food tunnel to the odors of 3 plant species and to water vapor. Grasshoppers moved odors (Kennedy & Moorhouse 1969, Mordue 1979, Chapman upwind to the odors of fresh-mashed narcissus and mashed Romaine lettuce, but not to water vapor, or in the absence of food odor. Males and females 1988, Chapman et al. 1988). Grasshoppers will also retreat from showed similar responses. Upwind movement tended to increase with the the odors of deterrent plants or chemicals (Kennedy & Moorhouse length of starvation (24, 48, or 72 h). The lack of upwind movement to water 1969, Chapman 1974). However, the most convincing evidence vapor implies that orientation toward the mashed plants was not simply an that grasshoppers use olfaction in food search comes from wind orientation to water vapor. These results support a growing data base that tunnel and olfactometer experiments, showing that grasshoppers suggests that grasshoppers can use olfaction when foraging in the wild. can orient upwind in response to food odors. To date, 3 grass- hopper species, Schistocerca gregaria, S. -
A Review of Natural Joint Systems and Numerical Investigation of Bio-Inspired GFRP-To-Steel Joints
materials Article A Review of Natural Joint Systems and Numerical Investigation of Bio-Inspired GFRP-to-Steel Joints Evangelos I. Avgoulas and Michael P. F. Sutcliffe * Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK; [email protected] * Correspondence: [email protected]; Tel.: +44-1223-332-996 Academic Editor: Frank Müller Received: 25 April 2016; Accepted: 1 July 2016; Published: 12 July 2016 Abstract: There are a great variety of joint types used in nature which can inspire engineering joints. In order to design such biomimetic joints, it is at first important to understand how biological joints work. A comprehensive literature review, considering natural joints from a mechanical point of view, was undertaken. This was used to develop a taxonomy based on the different methods/functions that nature successfully uses to attach dissimilar tissues. One of the key methods that nature uses to join dissimilar materials is a transitional zone of stiffness at the insertion site. This method was used to propose bio-inspired solutions with a transitional zone of stiffness at the joint site for several glass fibre reinforced plastic (GFRP) to steel adhesively bonded joint configurations. The transition zone was used to reduce the material stiffness mismatch of the joint parts. A numerical finite element model was used to identify the optimum variation in material stiffness that minimises potential failure of the joint. The best bio-inspired joints showed a 118% increase of joint strength compared to the standard joints. Keywords: natural joints; adhesive joints; biomimetics; bio-inspiration; composites 1. Introduction In recent years, the use of composite materials in automotive and aerospace industries has shown an upward trend due to their good stiffness-to-weight (E/r) and strength-to-weight (s/r) ratios. -
A Study on the Genus Chrysolina MOTSCHULSKY, 1860, with A
Genus Vol. 12 (2): 105-235 Wroc³aw, 30 VI 2001 A study on the genus Chrysolina MOTSCHULSKY, 1860, with a checklist of all the described subgenera, species, subspecies, and synonyms (Coleoptera: Chrysomelidae: Chrysomelinae) ANDRZEJ O. BIEÑKOWSKI Zelenograd, 1121-107, Moscow, K-460, 103460, Russia e-mail: [email protected] ABSTRACT. A checklist of all known Chrysolina species is presented. Sixty five valid subgenera, 447 valid species and 251 valid subspecies are recognized. The following new synonymy is established: Chrysolina (Apterosoma MOTSCHULSKY) (=Caudatochrysa BECHYNÉ), Ch. (Synerga WEISE) (=Chrysonotum J. SAHLBERG), Ch. (Sulcicollis J. SAHLBERG) (=Minckia STRAND), Ch. (Bittotaenia MOTSCHULSKY) (=Gemellata J. SAHLBERG, partim), Ch. (Hypericia BEDEL) (=Gemellata J. SAHLBERG, partim), Ch. (Ovosoma MOTSCHULSKY) (=Gemellata J. SAHLBERG, partim, =Byrrhiformis J. SAHLBERG, partim), Ch. (Colaphoptera MOTSCHULSKY) (=Byrrhiformis J. SAHLBERG, partim), Ch. aeruginosa poricollis MOTSCHULSKY (=lobicollis FAIRMAIRE), Ch. apsilaena DACCORDI (=rosti kubanensis L.MEDVEDEV et OKHRIMENKO), Ch. fastuosa biroi CSIKI (=fastuosa jodasi BECHYNÉ, 1954), Ch. differens FRANZ (=trapezicollis BECHYNÉ), Ch. difficilis ussuriensis JACOBSON (=pubitarsis BECHYNÉ), Ch. difficilis yezoensis MATSUMURA (=exgeminata BECHYNÉ, =nikinoja BECHYNÉ), Ch. marginata marginata LINNAEUS (=finitima BROWN), Ch. pedestris GEBLER (=pterosticha FISCHER DE WALDHEIM), Ch. reitteri saxonica DACCORDI (=diluta KRYNICKI). Ch. elbursica LOPATIN is treated as a subspecies of Ch. tesari ROUBAL, Ch. unicolor alaiensis LOPATIN - as Ch. dieckmanni alaiensis, and Ch. poretzkyi JACOBSON as a subspecies of Ch. subcostata GEBLER. Ch. peninsularis BECHYNÉ is a distinct species, but a subspecies of Ch. aeruginosa, Ch. brahma TAKIZAWA is a good species, not a synonym of Ch. lia JACOBSON (= freyi BECHYNÉ), and Ch. dzhungarica JACOBSON is a good species, not a synonym of Ch. -
Final Report 1
Sand pit for Biodiversity at Cep II quarry Researcher: Klára Řehounková Research group: Petr Bogusch, David Boukal, Milan Boukal, Lukáš Čížek, František Grycz, Petr Hesoun, Kamila Lencová, Anna Lepšová, Jan Máca, Pavel Marhoul, Klára Řehounková, Jiří Řehounek, Lenka Schmidtmayerová, Robert Tropek Březen – září 2012 Abstract We compared the effect of restoration status (technical reclamation, spontaneous succession, disturbed succession) on the communities of vascular plants and assemblages of arthropods in CEP II sand pit (T řebo ňsko region, SW part of the Czech Republic) to evaluate their biodiversity and conservation potential. We also studied the experimental restoration of psammophytic grasslands to compare the impact of two near-natural restoration methods (spontaneous and assisted succession) to establishment of target species. The sand pit comprises stages of 2 to 30 years since site abandonment with moisture gradient from wet to dry habitats. In all studied groups, i.e. vascular pants and arthropods, open spontaneously revegetated sites continuously disturbed by intensive recreation activities hosted the largest proportion of target and endangered species which occurred less in the more closed spontaneously revegetated sites and which were nearly absent in technically reclaimed sites. Out results provide clear evidence that the mosaics of spontaneously established forests habitats and open sand habitats are the most valuable stands from the conservation point of view. It has been documented that no expensive technical reclamations are needed to restore post-mining sites which can serve as secondary habitats for many endangered and declining species. The experimental restoration of rare and endangered plant communities seems to be efficient and promising method for a future large-scale restoration projects in abandoned sand pits. -
An Inventory of Short Horn Grasshoppers in the Menoua Division, West Region of Cameroon
AGRICULTURE AND BIOLOGY JOURNAL OF NORTH AMERICA ISSN Print: 2151-7517, ISSN Online: 2151-7525, doi:10.5251/abjna.2013.4.3.291.299 © 2013, ScienceHuβ, http://www.scihub.org/ABJNA An inventory of short horn grasshoppers in the Menoua Division, West Region of Cameroon Seino RA1, Dongmo TI1, Ghogomu RT2, Kekeunou S3, Chifon RN1, Manjeli Y4 1Laboratory of Applied Ecology (LABEA), Department of Animal Biology, Faculty of Science, University of Dschang, P.O. Box 353 Dschang, Cameroon, 2Department of Plant Protection, Faculty of Agriculture and Agronomic Sciences (FASA), University of Dschang, P.O. Box 222, Dschang, Cameroon. 3 Département de Biologie et Physiologie Animale, Faculté des Sciences, Université de Yaoundé 1, Cameroun 4 Department of Biotechnology and Animal Production, Faculty of Agriculture and Agronomic Sciences (FASA), University of Dschang, P.O. Box 222, Dschang, Cameroon. ABSTRACT The present study was carried out as a first documentation of short horn grasshoppers in the Menoua Division of Cameroon. A total of 1587 specimens were collected from six sites i.e. Dschang (265), Fokoue (253), Fongo – Tongo (267), Nkong – Ni (271), Penka Michel (268) and Santchou (263). Identification of these grasshoppers showed 28 species that included 22 Acrididae and 6 Pyrgomorphidae. The Acrididae belonged to 8 subfamilies (Acridinae, Catantopinae, Cyrtacanthacridinae, Eyprepocnemidinae, Oedipodinae, Oxyinae, Spathosterninae and Tropidopolinae) while the Pyrgomorphidae belonged to only one subfamily (Pyrgomorphinae). The Catantopinae (Acrididae) showed the highest number of species while Oxyinae, Spathosterninae and Tropidopolinae showed only one species each. Ten Acrididae species (Acanthacris ruficornis, Anacatantops sp, Catantops melanostictus, Coryphosima stenoptera, Cyrtacanthacris aeruginosa, Eyprepocnemis noxia, Gastrimargus africanus, Heteropternis sp, Ornithacris turbida, and Trilophidia conturbata ) and one Pyrgomorphidae (Zonocerus variegatus) were collected in all the six sites. -
Chrysomela 43.10-8-04
CHRYSOMELA newsletter Dedicated to information about the Chrysomelidae Report No. 43.2 July 2004 INSIDE THIS ISSUE Fabreries in Fabreland 2- Editor’s Page St. Leon, France 2- In Memoriam—RP 3- In Memoriam—JAW 5- Remembering John Wilcox Statue of 6- Defensive Strategies of two J. H. Fabre Cassidine Larvae. in the garden 7- New Zealand Chrysomelidae of the Fabre 9- Collecting in Sholas Forests Museum, St. 10- Fun With Flea Beetle Feces Leons, France 11- Whither South African Cassidinae Research? 12- Indian Cassidinae Revisited 14- Neochlamisus—Cryptic Speciation? 16- In Memoriam—JGE 16- 17- Fabreries in Fabreland 18- The Duckett Update 18- Chrysomelidists at ESA: 2003 & 2004 Meetings 19- Recent Chrysomelid Literature 21- Email Address List 23- ICE—Phytophaga Symposium 23- Chrysomela Questionnaire See Story page 17 Research Activities and Interests Johan Stenberg (Umeå Univer- Duane McKenna (Harvard Univer- Eduard Petitpierre (Palma de sity, Sweden) Currently working on sity, USA) Currently studying phyloge- Mallorca, Spain) Interested in the cy- coevolutionary interactions between ny, ecological specialization, population togenetics, cytotaxonomy and chromo- the monophagous leaf beetles, Altica structure, and speciation in the genus somal evolution of Palearctic leaf beetles engstroemi and Galerucella tenella, and Cephaloleia. Needs Arescini and especially of chrysomelines. Would like their common host plant Filipendula Cephaloleini in ethanol, especially from to borrow or exchange specimens from ulmaria (meadow sweet) in a Swedish N. Central America and S. America. Western Palearctic areas. Archipelago. Amanda Evans (Harvard University, Maria Lourdes Chamorro-Lacayo Stefano Zoia (Milan, Italy) Inter- USA) Currently working on a phylogeny (University of Minnesota, USA) Cur- ested in Old World Eumolpinae and of Leptinotarsa to study host use evolu- rently a graduate student working on Mediterranean Chrysomelidae (except tion. -
Poplars and Willows: Trees for Society and the Environment / Edited by J.G
Poplars and Willows Trees for Society and the Environment This volume is respectfully dedicated to the memory of Victor Steenackers. Vic, as he was known to his friends, was born in Weelde, Belgium, in 1928. His life was devoted to his family – his wife, Joanna, his 9 children and his 23 grandchildren. His career was devoted to the study and improve- ment of poplars, particularly through poplar breeding. As Director of the Poplar Research Institute at Geraardsbergen, Belgium, he pursued a lifelong scientific interest in poplars and encouraged others to share his passion. As a member of the Executive Committee of the International Poplar Commission for many years, and as its Chair from 1988 to 2000, he was a much-loved mentor and powerful advocate, spreading scientific knowledge of poplars and willows worldwide throughout the many member countries of the IPC. This book is in many ways part of the legacy of Vic Steenackers, many of its contributing authors having learned from his guidance and dedication. Vic Steenackers passed away at Aalst, Belgium, in August 2010, but his work is carried on by others, including mem- bers of his family. Poplars and Willows Trees for Society and the Environment Edited by J.G. Isebrands Environmental Forestry Consultants LLC, New London, Wisconsin, USA and J. Richardson Poplar Council of Canada, Ottawa, Ontario, Canada Published by The Food and Agriculture Organization of the United Nations and CABI CABI is a trading name of CAB International CABI CABI Nosworthy Way 38 Chauncey Street Wallingford Suite 1002 Oxfordshire OX10 8DE Boston, MA 02111 UK USA Tel: +44 (0)1491 832111 Tel: +1 800 552 3083 (toll free) Fax: +44 (0)1491 833508 Tel: +1 (0)617 395 4051 E-mail: [email protected] E-mail: [email protected] Website: www.cabi.org © FAO, 2014 FAO encourages the use, reproduction and dissemination of material in this information product. -
Root Maggots (Onion - Delia Antiqua; Cabbage - Delia Radicum)
Root Maggots (Onion - Delia antiqua; Cabbage - Delia radicum) Figure 2 Root maggot larvae, 1/4" long Figure 1 Adult, 1/4" long Figure 3 Damage to onion Damage The maggots feed on the roots and the bulbs (in the case of onions), creating numerous tunnels. Plants first begin to wilt and can eventually become stunted and yellowed. Heavily infested plants can ultimately die. When Are They Active Root maggots overwinter in the top few inches of garden soil. In late April - early May adult flies emerge to lay 50-200 white eggs on the soil near the base of crops. Eggs hatch in 3-7 days and larvae immediately begin feeding on the roots of the plants. Feeding continues for 3-4 weeks before larvae pupate in the soil. Susceptible Plants Onion maggots are an early season pest of root vegetables such as onion, garlic, carrot, and radish, whereas cabbage maggots are mainly a pest of cabbage, broccoli, cauliflower, Brussels sprouts, radishes, and turnips. Prevention Methods Most root maggot adults are attracted to rotting organic matter; avoid incorporating animal manure or green manure in spring. When possible, delay planting susceptible plants until the threat of root maggots is reduced, which is generally after June 1st. Plant crops in well-drained soils and only when the soil temperatures exceed 50° F. Row covers are effective during flight periods and must be set up in your garden by the time adults flies are laying eggs which is usually early to mid-May. Don't use row covers if onions or other root vegetables or cucurbits were planted in the same area the previous year. -
Companion Planting and Insect Pest Control
Chapter 1 Companion Planting and Insect Pest Control Joyce E. Parker, William E. Snyder, George C. Hamilton and Cesar Rodriguez‐Saona Additional information is available at the end of the chapter http://dx.doi.org/10.5772/55044 1. Introduction There is growing public concern about pesticides’ non-target effects on humans and other organisms, and many pests have evolved resistance to some of the most commonly-used pesticides. Together, these factors have led to increasing interest in non-chemical, ecologically- sound ways to manage pests [1]. One pest-management alternative is the diversification of agricultural fields by establishing “polycultures” that include one or more different crop varieties or species within the same field, to more-closely match the higher species richness typical of natural systems [2, 3]. After all, destructive, explosive herbivore outbreaks typical of agricultural monocultures are rarely seen in highly-diverse unmanaged communities. There are several reasons that diverse plantings might experience fewer pest problems. First, it can be more difficult for specialized herbivores to “find” their host plant against a back‐ ground of one or more non-host species [4]. Second, diverse plantings may provide a broader base of resources for natural enemies to exploit, both in terms of non-pest prey species and resources such as pollen and nectar provided by the plant themselves, building natural enemy communities and strengthening their impacts on pests [4]. Both host-hiding and encourage‐ ment of natural enemies have the potential to depress pest populations, reducing the need for pesticide applications and increasing crop yields [5, 6]. On the other hand, crop diversification can present management and economic challenges for farmers, making these schemes difficult to implement. -
Bugs & Beasties of the Western Rhodopes
Bugs and Beasties of the Western Rhodopes (a photoguide to some lesser-known species) by Chris Gibson and Judith Poyser [email protected] Yagodina At Honeyguide, we aim to help you experience the full range of wildlife in the places we visit. Generally we start with birds, flowers and butterflies, but we don’t ignore 'other invertebrates'. In the western Rhodopes they are just so abundant and diverse that they are one of the abiding features of the area. While simply experiencing this diversity is sufficient for some, as naturalists many of us want to know more, and in particular to be able to give names to what we see. Therein lies the problem: especially in eastern Europe, there are few books covering the invertebrates in any comprehensive way. Hence this photoguide – while in no way can this be considered an ‘eastern Chinery’, it at least provides a taster of the rich invertebrate fauna you may encounter, based on a couple of Honeyguide holidays we have led in the western Rhodopes during June. We stayed most of the time in a tight area around Yagodina, and almost anything we saw could reasonably be expected to be seen almost anywhere around there in the right habitat. Most of the photos were taken in 2014, with a few additional ones from 2012. While these creatures have found their way into the lists of the holiday reports, relatively few have been accompanied by photos. We have attempted to name the species depicted, using the available books and the vast resources of the internet, but in many cases it has not been possible to be definitive and the identifications should be treated as a ‘best fit’. -
Cabbage Maggot Delia Radicum (Linnaeus); Family: Anthomyiidae
IDL INSECT DIAGNOSTIC LABORATORY Cornell University, Dept. of Entomology, 2144 Comstock Hall, Ithaca NY 14853-2601 Cabbage Maggot Delia radicum (Linnaeus); Family: Anthomyiidae Cabbage maggots infesting the roots. Injury The cabbage maggot can seriously injure cabbage, cauliflower, turnip, radish, and related crucifer crops. Early planted crucifers, or seedbeds of late ones, are more likely to be attacked. The young maggot begins feeding on the tender rootlets and then rasps out a channel in the main root of the plant. An early indication of attack to the cabbage plant is the symptom of the plant wilting badly during the heat of the day. The plants may take on a bluish cast. The plant either dies in a few days or persists in a sickly condition for some time. In cases where the plant dies quickly, there usually are a large number of maggots that riddle the root, making way for decay organisms to get in and take over quickly. If such a plant is dug up, one should be able to see the whitish maggots, which may at first resemble a grain of rice, in the soil around the roots of the injured plants. Brown tunnels in stems or roots of older plants are also evident Description Cabbage maggots are true flies (Diptera), closely related to the seed corn maggot. The adults are gray, long- legged flies a little smaller than the common house fly. Home gardeners seldom see them. The larvae (maggots) are white, legless, tapered toward the head, and have hook-shaped black mouthparts that curve downward, for rasping plant tissue.