Notification of an Emergency Authorisation Issued by Belgium

Total Page:16

File Type:pdf, Size:1020Kb

Notification of an Emergency Authorisation Issued by Belgium Notification of an Emergency Authorisation issued by Belgium 1. Member State, and MS notification number BE-Be-2020-02 2. In case of repeated derogation: no. of previous derogation(s) None 3. Names of active substances Tefluthrin - 15.0000 g/kg 4. Trade name of Plant Protection Product Force 1.5 GR 5. Formulation type GR 6. Authorisation holder KDT 7. Time period for authorisation 01/04/2020 - 29/07/2020 8. Further limitations Generated by PPPAMS - Published on 04/02/2020 - Page 1 of 7 9. Value of tMRL if needed, including information on the measures taken in order to confine the commodities resulting from the treated crop to the territory of the notifying MS pending the setting of a tMRL on the EU level. (PRIMO EFSA model to be attached) / 10. Validated analytical method for monitoring of residues in plants and plant products. Source: Reasoned opinion on the setting of maximum residue levels for tefluthrin in various crops1 EFSA Journal 2015;13(7):4196: https://efsa.onlinelibrary.wiley.com/doi/epdf/10.2903/j.efsa.2015.4196 1. Method of analysis 1.1.Methods for enforcement of residues in food of plant origin Analytical methods for the determination of tefluthrin residues in plant commodities were assessed in the DAR and during the peer review under Directive 91/414/EEC (Germany, 2006, 2009; EFSA, 2010). The modified multi-residue DFG S 19 analytical method using GC-MSD quantification and its ILV were considered as fully validated for the determination of tefluthrin in high water content- (sugar beet root), high acid content- (orange), high oil content- (oilseed rape) and dry/starch- (maize grain) commodities at an LOQ of 0.01 mg/kg. However a confirmatory method is missing. Since the commodities under consideration belong to the group of high water content commodities, EFSA concludes that a sufficiently validated analytical method for enforcing the proposed MRLs for tefluthrin in these crops is available. A validated confirmatory method is however required. Damage of onion fly (Delia antiqua) is caused by larvae boring into the base plate and roots followed by secondary breakdown of tissues either in the field or during storage. Each year, there are 2 or 3 generations. Late-generation pupae overwinter in the soil. The first flies are monitored at the end of April or begin of Mai. The eggs are laid in the ground, near young plants or between the shoots of bulbs. The larvae are white and cylindrical and hatch in 3 to 8 days. The larvae create large cavities in bulbs and roots. The first generation of larvae is the most harmful, because it occurs when the plants are small. Seedlings of onions/spring onions can be severely affected. The leaves start to turn yellow and the bulbs rot quickly or will be malformed. 1.2.Methods for enforcement of residues in food of animal origin The analytical methods for the determination of tefluthrin residues in commodities of animal origin were evaluated in the DAR and during the peer review under Directive 91/414/EEC (Germany, 2006, 2009; EFSA, 2010) and also in the framework of this MRL application (France, 2013, 2015). The multi-residue DFG S 19 analytical method using GC-MSD quantification and its ILV were considered as fully validated for the determination of tefluthrin in animal commodities at an LOQ of 0.002 mg/kg for muscle, liver, kidney, eggs and fat and at an LOQ of 0.001 mg/kg for milk. EFSA concludes that a sufficiently validated analytical method for enforcing the proposed MRLs for tefluthrin in food of animal origin is available. 11. Function of the product (E.g. systemic long acting insecticide; foliar fungicide, used for regular control, elimination scenario etc) insecticide 12. Type of danger to plant production or ecosystem (Provide reasoning for what category the 120 day authorisation is given: quarantine pest; emergent pest, either invading non-native, or native; emerging resistance in a pest, etc. Whereas reference to the EU quarantine legislation may suffice for quarantine pests elaborate reasoning should be provided for the category 'any harmful pest') Carrot fly (Psila rosae) is a well known pest insect in carrots and other root vegetables. Carrot fly overwinters as a pupa in the soil. The adults appear over an extended period, from the end of April/begin of May until July. The flies take flight on fine days, flying slowly, landing frequently on the leaves of a large variety of low-growing plants. They mate and lay eggs shortly afterwards in the ground near host plants, carrots. Embryo development: 8 to 10 days. Larvae move in the soil and penetrate the roots. One larvae can penetrate more than one root. Larval development lasts one month after which it pupates. Damage of the larvae can vary form twisting galleries, notably in the external layer to falling down of the leaves (if roots are highly affected by the larvae). Since 2001, is monitoring of the Psila rosae population ongoing in the different production regions of Belgium. The Belgian research stations and growers monitor the populations and developed a system to control the pest well-reasoned (economic threshold on 3 flies/trap). In case of an exceedance on a field, the grower is advised to treat the field. It’s important to control the carrot fly at the right time. If carrot fly is present or not and at what time is extremely dependent from field to field. That’s why a general warning system is not used, but each field needed to be monitored with traps. Growers were supervised to recognize carrot fly and to count them weekly on the orange traps. Depending on the results of the count, a grower needs to decide to take action or not. About 300 growers of carrots are participating in the monitoring system, which represents about 350 fields with carrots and means a 1.260 ha. Generally three distinct periods of adult flight activity are observed, indicating three generations of Psilae rosae a year. Depending on the weather conditions, population pressure in the region, type of crops in the region… the first flight peaked in May/begin June, followed by a second peak in July/August, and a third peak September to November. A period with a lot of rain is favorable for egg development. Since many years is cabbage fly (Delia radicum) in cauliflower, broccoli, Brussels sprouts, head cabbages, Chinese cabbage, kale, swedes and kohlrabi a very serious problem. It’s also a problem in turnips, Generated by PPPAMS - Published on 04/02/2020 - Page 2 of 7 Phyllotreta cruciferae. Control of cabbage fly and turnip fly is a major problem in Belgium and in other European countries. The larvae of cabbage feed on the roots of cabbages (turnips) and on the buttons of Brussels sprouts, with yield reduction as result. More severe infestations cause stunting, bluish or purple/red discoloration of the leaves, plants may wilt and die. Infested buttons will rot. Life cycle: Each year, there are 2 or 3 generations, starting from emergence and egg laying in April and extending, with some overlapping into September. Eggs are laid at the feet of the plant, where larvae tunnel into the roots. This cause growth retardation and infested plants become more sensitive to dryness. With the development of the cabbage the plant falls down. Delia (Phorbia) platura is in peas and beans a well-known pest in seedling stage. Female deposits eggs in the soil, near the seeds. The larvae penetrate into the seeds and feed on germinating seeds, seedlings, forming galleries in the cotyledons, small stems and the young shoots before they emerge from the soil. The seeds and seedlings are susceptible for 3 to 4 weeks after sowing. Afterwards is the skin too hard to penetrate. An infestation of Delia platura can cause serious damage in the fields: some seeds can’t germinate anymore, others germinate, but the cotyledons and first leaves are destroyed. They often cause the plant to rot. And secondly, infested and wounded plants are highly susceptible to fungi. 13. Size and effect of danger (Describe shortly the area affected, the development over time of the infestation, and the agronomic and economic effects it has) Beetroots: 35 ha (2018) 40 ha (2019) 520 ton (2019) Carrots: 5.650 ha (2018) 5.750 ha (2019) 323.500 ton (2019) Horseradishes small acreage (no detailed statistics available) Parsnips: 225 ha (2018) 270 ha (2019) 7.875 ton (2019) Parsley/chervil roots: small acreage (no detailed statistics available) Black radishes small acreage (no detailed statistics available) Salsifies 580 ha (2018) 525 ha (2019) 11.600 ton (2019) Swedes/turnips 520 ha (2018) 490 ha (2019) 15.000 ton (2018) Onions: 3.700 ha (2018) 2.142 ha (2019) 105.375 ton (2018) Garlic: small acreage (no detailed statistics available) Cauliflower: 5.470 ha (2018) 5.540 ha (2019) 118.000 ton (2018) Broccoli: 248 ha (2018) 275 ha (2019) 3.300 ton (2018) Brussels sprouts: 2.450 ha (2018) 2.700 ha (2019) 55.000 ton (2018) Head cabbage: 1.000 ha (2018) 1.075 ha (2019) 52.900 ton (2018) Chinese cabbage: 47 ha (2018) 52 ha (2019) 3.250 ton (2018) Kale 100 ha (2018) 115 ha (2019) 2.500 ton (2018) Kohlrabi: 108 ha (2018) 100 ha (2019) 10.800 ton (2018) Beans: 7.900 ha (2018) 7.600 ha (2019) 89.700 ton (2018) Peas: 11.300 ha (2018) 10.200 ha (2019) 62.150 ton (2018) Leek 3.775 ha (2018) 4.025 ha (2019) 130.000 ton (2018) VBT-data, annual statistics There is a zero tolerance for damage of different vegetable flies and Agriotes.
Recommended publications
  • Some Aspects of the Biology of a Predaceous Anthomyiid Fly, Coenosia Tigrina
    The Great Lakes Entomologist Volume 22 Number 1 - Spring 1989 Number 1 - Spring 1989 Article 2 April 1989 Some Aspects of the Biology of a Predaceous Anthomyiid Fly, Coenosia Tigrina Francis A. Drummond University of Maine Eleanor Groden University of Maine D. L. Haynes Michigan State University Thomas C. Edens Michigan State University Follow this and additional works at: https://scholar.valpo.edu/tgle Part of the Entomology Commons Recommended Citation Drummond, Francis A.; Groden, Eleanor; Haynes, D. L.; and Edens, Thomas C. 1989. "Some Aspects of the Biology of a Predaceous Anthomyiid Fly, Coenosia Tigrina," The Great Lakes Entomologist, vol 22 (1) Available at: https://scholar.valpo.edu/tgle/vol22/iss1/2 This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. For more information, please contact a ValpoScholar staff member at [email protected]. Drummond et al.: Some Aspects of the Biology of a Predaceous Anthomyiid Fly, <i>Co 1989 THE GREAT LAKES ENTOMOLOGIST 11 SOME ASPECTS OF THE BIOLOGY OF A PREDACEOUS ANTHOMYIID FLY. COENOSIA TIGRINAI 2 2 3 3 Francis A. Drummond , Eleanor Groden , D.L. Haynes , and Thomas C. Edens ABSTRACT The results of a two-year study in Michigan on the incidence of Coenosia tigrina adults under different onion production practices is presented. In Michigan, C. tigrina has three generations and is more abundant in organic agroecosystems than chemically-intensive onion production systems. Adults of the tiger fly, Coenosia tigrina (F.), are primarily predators of Diptera.
    [Show full text]
  • The Effect of Peeling on Antioxidant Capacity of Black Radish Root
    PAPER THE EFFECT OF PEELING ON ANTIOXIDANT CAPACITY OF BLACK RADISH ROOT E. ENKHTUYA* and M. TSEND Department of Food Engineering, Mongolian University of Science and Technology, Baga toiruu 34, Ulaanbaatar, Mongolia *Corresponding author: [email protected] ABSTRACT In this study, freeze-dried peeled and unpeeled root, as well as the juice from peeled and unpeeled root of black radish (Raphanus sativus L. var niger) cultivated in Mongolia were characterized for their DPPH• and ABTS•+ scavenging activity, reducing power, total phenolics, and flavonoids in order to evaluate the effect of the peel. The juice from the peeled root showed strong antioxidant potential may due to its high phenolic content. However, the ability of the dried unpeeled root extract to quench free radicals and reduce Fe3+ was higher than that of the dried peeled root extract. Keywords: antioxidant capacity, black radish, peel, phenolic compounds, root Ital. J. Food Sci., vol. 32, 2020 - 701 1. INTRODUCTION Fruits and vegetables play a vital role in the prevention of degenerative diseases caused by oxidative stress and the improvement of general health as these contain vitamins, minerals, amino acids, dietary fibers, and phenolic compounds. For instance, the prevention of cancer and cardiovascular diseases has been strongly related to the intake of fresh fruits and vegetables rich in natural antioxidants. This suggests that a higher intake of such compounds will lower the risk of mortality from these diseases (WILLCOX et al., 2004). Radish (Raphanus sativus Linn.) is an edible root vegetable of the Brassicaceae (Cruciferae) family with some other popular vegetables including white and red cabbage, broccoli, brussel sprouts, cauliflower, kohlrabi, rape, and mustard.
    [Show full text]
  • View the PDF of the Abstract Volume Supplement
    Biodiversity surveys Review of the horseflies (Tabanidae) of Madagascar Theo Zeegers Eikenlaan 24, 3768 EV Soest, the Netherlands, [email protected] Keywords: Tabanidae, Madagascar, phylogeny The horseflies (Tabanidae) of Madagascar are reviewed. This review is primary based on the largest number of horseflies ever collected thanks to recent programs (more than 4000 specimens). All material in the musea of Berlin, London and Paris was studied, including the types for most species from Madagascar. So far, 75 species of Tabanidae had been reported from Madagascar. This study adds about 21 species, all new to science, and 1 revised status. Nearly all species are endemic to Madagascar. More than one-third belong to the endemic (sub)genus Triclida . Another large genus is Tabanocella , represented by at least 17 species. Both genera are associated with forests. The subfamily Pangoniinae is recorded from Madagascar for the first time. Special attention is given to the tribe Rhinomyizini, which has ‘being weird’ as a synapomorphy This tribe occurs in the Afrotropical region both on the mainland of Africa and on Madagascar. Recent authors have introduced several new genera based on features known to be plastic. Oldroyd, on the other hand, used broader concepts of genera, though he separated the genera Thriambeutes from the mainland and Orgizomyia from Madagascar mainly on geographical basis. In the present study I performed a phylogenetic analysis of the Rhynomyzini of Madagascar for the first time in order to gain a better understanding of the relations at the generic level. In this analysis, I introduce several new characters and include two very interesting new species (in the genera Orgizomyia and Seguytabanus ).
    [Show full text]
  • Bulletin of Zoological Nomenclature
    \M RD IV WV The Bulletin of Zoological Nomenclature IGzjJxjThe Official Periodical of the International Commission on Zoological Nomenclature Volume 56, 1999 Published on behalf of the Commission by The International Trust for Zoological Nomenclature c/o The Natural History Museum Cromwell Road London, SW7 5BD, U.K. ISSN 0007-5167 '£' International Trust for Zoological Nomenclature Bulletin of Zoological Nomenclature 56(4) December 1999 I TABLE OF CONTENTS Page Notices 1 The International Commission on Zoological Nomenclature and its publications . 2 Addresses of members of the Commission 3 International Trust for Zoological Nomenclature 4 The International Code of Zoological Nomenclature 5 Towards Stability in the Names of Animals 5 General Article Recording and registration of new scientific names: a simulation of the mechanism proposed (but not adopted) for the International Code of Zoological Nomen- clature. P. Bouchet 6 Applications Eiulendriwn arbuscula Wright, 1859 (Cnidaria, Hydrozoa): proposed conservation of the specific name. A.C. Marques & W. Vervoort 16 AUGOCHLORiNi Moure. 1943 (Insecta. Hymenoptera): proposed precedence over oxYSTOGLOSSiNi Schrottky, 1909. M.S. Engel 19 Strongylogasier Dahlbom. 1835 (Insecta. Hymenoptera): proposed conservation by the designation of Teiuhredo muhifascuim Geoffroy in Fourcroy, 1785 as the type species. S.M. Blank, A. Taeger & T. Naito 23 Solowpsis inviclu Buren, 1972 (Insecta, Hymenoptera): proposed conservation of the specific name. S.O. Shattuck. S.D. Porter & D.P. Wojcik 27 NYMPHLILINAE Duponchel, [1845] (Insecta, Lepidoptera): proposed precedence over ACENTROPiNAE Stephens. 1835. M.A. Solis 31 Hemibagnis Bleeker, 1862 (Osteichthyes, Siluriformes): proposed stability of nomenclature by the designation of a single neotype for both Bagrus neimirus Valenciennes, 1840 and B.
    [Show full text]
  • Onion Maggot, Onion Fly
    Pest Profile Photo credit: Left and middle adult, right image pupae. Pest and Diseases Image Library, Bugwood.org licensed under a Creative Commons Attribution-Noncommercial 3.0 License. Common Name: Onion Maggot, Onion Fly Scientific Name: Delia antiqua Order and Family: Diptera: Anthomyiidae Size and Appearance: Length (mm) Appearance Egg I.25 mm Eggs are white and elongated. Can be found on the soil near the stem and occasionally on the young leaves and neck of the onion plant. Larva 8-10 mm Larvae are tapered and creamy white in color. Adult 3-6 mm Greyish, looks similar to a housefly, except they have a narrower abdomen, longer legs and overlap their wings when at rest. Pupae 7 mm They are chestnut brown and elongated, found in the soil at a depth of 5-10 cm. Type of feeder (Chewing, sucking, etc.): Chewing (hooked mouthparts) Host plant/s: Serious pest of onion and related Allium crops such as garlic and leeks. Description of Damage (larvae and adults): Only the larva causes damage. Larvae use their hooked mouth parts to enter the base of the plant and then feed on the internal plant tissues. The kind of damage varies depending on time of year and which of three generations is causing the damage. All three generations can be destructive, but the first generation is the most damaging because it can routinely reduce unprotected plant stands by over 50%. First generation: Younger plants are more vulnerable to larval feeding and damage than older plants because as the plants grow the underground portion of the plant and bulb become more difficult for the larvae to penetrate.
    [Show full text]
  • ARTHROPODA Subphylum Hexapoda Protura, Springtails, Diplura, and Insects
    NINE Phylum ARTHROPODA SUBPHYLUM HEXAPODA Protura, springtails, Diplura, and insects ROD P. MACFARLANE, PETER A. MADDISON, IAN G. ANDREW, JOCELYN A. BERRY, PETER M. JOHNS, ROBERT J. B. HOARE, MARIE-CLAUDE LARIVIÈRE, PENELOPE GREENSLADE, ROSA C. HENDERSON, COURTenaY N. SMITHERS, RicarDO L. PALMA, JOHN B. WARD, ROBERT L. C. PILGRIM, DaVID R. TOWNS, IAN McLELLAN, DAVID A. J. TEULON, TERRY R. HITCHINGS, VICTOR F. EASTOP, NICHOLAS A. MARTIN, MURRAY J. FLETCHER, MARLON A. W. STUFKENS, PAMELA J. DALE, Daniel BURCKHARDT, THOMAS R. BUCKLEY, STEVEN A. TREWICK defining feature of the Hexapoda, as the name suggests, is six legs. Also, the body comprises a head, thorax, and abdomen. The number A of abdominal segments varies, however; there are only six in the Collembola (springtails), 9–12 in the Protura, and 10 in the Diplura, whereas in all other hexapods there are strictly 11. Insects are now regarded as comprising only those hexapods with 11 abdominal segments. Whereas crustaceans are the dominant group of arthropods in the sea, hexapods prevail on land, in numbers and biomass. Altogether, the Hexapoda constitutes the most diverse group of animals – the estimated number of described species worldwide is just over 900,000, with the beetles (order Coleoptera) comprising more than a third of these. Today, the Hexapoda is considered to contain four classes – the Insecta, and the Protura, Collembola, and Diplura. The latter three classes were formerly allied with the insect orders Archaeognatha (jumping bristletails) and Thysanura (silverfish) as the insect subclass Apterygota (‘wingless’). The Apterygota is now regarded as an artificial assemblage (Bitsch & Bitsch 2000).
    [Show full text]
  • Sulforaphene Isolated from Radish (Raphanus
    Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 3 July 2018 doi:10.20944/preprints201807.0060.v1 Article Sulforaphene Isolated from Radish (Raphanus Sativus L.) Seeds Inhibits Growth of Six Cancer Cell Lines and Induces Apoptosis of A549 Cells Sooyeon Lim 1, 4, Jin-Chul Ahn 2, Eun Jin Lee 3, *, and Jongkee Kim 1, * 1 Department of Integrative Plant Science, Chung-Ang University, Anseong 456-756, Republic of Korea; [email protected] (S.L.); [email protected] (J.K.) 2 Department of Biomedical Engineering, College of Medicine, Dankook University, Cheonan 31116, Republic of Korea; [email protected] 3 Department of Plant Science, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea; [email protected] 4 Seed Viability Research Team, Department of Seed Vault, Baekdudaegan National Arboretum, Bonghwa, 36209, Republic of Korea; [email protected] *Co-correspondence (E.J.L): [email protected]; Tel. +82-2-880-4565; Fax +82-2-880-2056 *Co-correspondence (J.K): [email protected]; Tel. +82-31-670-3042; Fax +82-31-670-3042 Abstract: Sulforaphene (SFE), a major isothiocyanate in radish seeds, is a close chemical relative of sulforaphane (SFA) isolated from broccoli seeds and florets. The anti-proliferative mechanisms of SFA against cancer cells have been well investigated, but little is known about the potential anti- proliferative effects of SFE. In this study, we showed that SFE purified from radish seeds inhibited the growth of six cancer cell lines (A549, CHO, HeLa, Hepa1c1c7, HT-29, and LnCaP), with relative © 2018 by the author(s).
    [Show full text]
  • Cheshire Wildlife Trust
    Cheshire Wildlife Trust Heteroptera and Diptera surveys on the Manchester Mosses with PANTHEON analysis by Phil Brighton 32, Wadeson Way, Croft, Warrington WA3 7JS [email protected] on behalf of Lancashire and Cheshire Wildlife Trusts Version 1.0 September 2018 Lancashire Wildlife Trust Page 1 of 35 Abstract This report describes the results of a series of surveys on the Manchester mosslands covering heteroptera (shield bugs, plant bugs and allies), craneflies, hoverflies, and a number of other fly families. Sites covered are the Holcroft Moss reserve of Cheshire Wildlife Trust and the Astley, Cadishead and Little Woolden Moss reserves of Lancashire Wildlife Trust. A full list is given of the 615 species recorded and their distribution across the four sites. This species list is interpreted in terms of feeding guilds and habitat assemblages using the PANTHEON software developed by Natural England. This shows a strong representation in the sample of species associated with shaded woodland floor and tall sward and scrub. The national assemblage of peatland species is somewhat less well represented, but includes a higher proportion of rare or scarce species. A comparison is also made with PANTHEON results for similar surveys across a similar range of habitats in the Delamere Forest. This suggests that the invertebrate diversity value of the Manchester Mosses is rather less, perhaps as a result of their fragmented geography and proximity to past and present sources of transport and industrial pollution. Introduction The Manchester Mosses comprise several areas of lowland bog or mire embedded in the flat countryside between Warrington and Manchester. They include several areas designated as SSSIs in view of the highly distinctive and nationally important habitat, such as Risley Moss, Holcroft Moss, Bedford Moss, and Astley Moss.
    [Show full text]
  • The De Novo Transcriptome and Its Analysis in the Worldwide Vegetable Pest, Delia Antiqua (Diptera: Anthomyiidae)
    INVESTIGATION The de novo Transcriptome and Its Analysis in the Worldwide Vegetable Pest, Delia antiqua (Diptera: Anthomyiidae) Yu-Juan Zhang, Youjin Hao, Fengling Si, Shuang Ren, Ganyu Hu, Li Shen, and Bin Chen1 Institute of Entomology and Molecular Biology, College of Life Sciences, Chongqing Normal University, Chongqing, People’s Republic of China ABSTRACT The onion maggot Delia antiqua is a major insect pest of cultivated vegetables, especially the KEYWORDS onion, and a good model to investigate the molecular mechanisms of diapause. To better understand the onion maggot biology and diapause mechanism of the insect pest species, D. antiqua, the transcriptome was sequenced high-throughput using Illumina paired-end sequencing technology. Approximately 54 million reads were obtained, trimmed, RNA and assembled into 29,659 unigenes, with an average length of 607 bp and an N50 of 818 bp. Among sequencing these unigenes, 21,605 (72.8%) were annotated in the public databases. All unigenes were then compared de novo against Drosophila melanogaster and Anopheles gambiae. Codon usage bias was analyzed and 332 simple assembly sequence repeats (SSRs) were detected in this organism. These data represent the most comprehensive codon usage bias transcriptomic resource currently available for D. antiqua and will facilitate the study of genetics, genomics, simple sequence diapause, and further pest control of D. antiqua. repeat The onion maggot Delia antiqua is a major insect pest of cultivated in a selected tissue and species of interest and generates quantitative vegetables, especially onions, and is widely distributed in the northern expression scores for each transcript (Wilhelm and Landry 2009). hemisphere. It can be induced into summer and winter diapauses, Such transcriptome analysis will likely replace large-scale microarray both happening at the pupal stage and just after head evagination approaches (Marioni et al.
    [Show full text]
  • Insect Egg Size and Shape Evolve with Ecology but Not Developmental Rate Samuel H
    ARTICLE https://doi.org/10.1038/s41586-019-1302-4 Insect egg size and shape evolve with ecology but not developmental rate Samuel H. Church1,4*, Seth Donoughe1,3,4, Bruno A. S. de Medeiros1 & Cassandra G. Extavour1,2* Over the course of evolution, organism size has diversified markedly. Changes in size are thought to have occurred because of developmental, morphological and/or ecological pressures. To perform phylogenetic tests of the potential effects of these pressures, here we generated a dataset of more than ten thousand descriptions of insect eggs, and combined these with genetic and life-history datasets. We show that, across eight orders of magnitude of variation in egg volume, the relationship between size and shape itself evolves, such that previously predicted global patterns of scaling do not adequately explain the diversity in egg shapes. We show that egg size is not correlated with developmental rate and that, for many insects, egg size is not correlated with adult body size. Instead, we find that the evolution of parasitoidism and aquatic oviposition help to explain the diversification in the size and shape of insect eggs. Our study suggests that where eggs are laid, rather than universal allometric constants, underlies the evolution of insect egg size and shape. Size is a fundamental factor in many biological processes. The size of an 526 families and every currently described extant hexapod order24 organism may affect interactions both with other organisms and with (Fig. 1a and Supplementary Fig. 1). We combined this dataset with the environment1,2, it scales with features of morphology and physi- backbone hexapod phylogenies25,26 that we enriched to include taxa ology3, and larger animals often have higher fitness4.
    [Show full text]
  • Diptera: Psilidae)
    Eur. J. Entomol. 103: 183–192, 2006 ISSN 1210-5759 The identity of Pseudopsila, description of a new subgenus of Psila, and redefinition of Psila sensu lato (Diptera: Psilidae) MATTHIAS BUCK and STEPHEN A. MARSHALL Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; e-mail: [email protected] Key words. Psila, Xenopsila, Pseudopsila, Psilidae, phylogeny, redefinition, subgenera, key, new synonymy, new subgenus, New World, morphology, male genitalia, egg Abstract. The type species of Pseudopsila Johnson, P. fallax (Loew), and two related species are found to belong in Psila s. str., and Pseudopsila is thus synonymized with Psila Meigen. The remaining species formerly included in Pseudopsila form a monophyletic group here described as Xenopsila Buck subgen. n. [i.e., Psila (Xenopsila) collaris Loew comb. n., P. (X.) bivittata Loew comb. n., P. (X.) lateralis Loew comb. n., P. (X.) arbustorum Shatalkin comb. n., P. (X.) nemoralis Shatalkin comb. n., P. (X.) tetrachaeta (Shatalkin) comb. n., P. (X.) maculipennis (Frey) comb. n., P. (X.) nigricollis (Frey) comb. n., P. (X.) nigrohumera (Wang & Yang) comb. n.]. A key to the Nearctic species of Xenopsila and the Psila fallax-group is provided. The placement of Xenopsila in Psila s. l. is confirmed by newly recognised synapomorphies of the egg stage. The somewhat questionable monophyly of Psila s. l. is con- firmed based on these new synapomorphies, thereby slightly expanding its taxonomic limits to also include Asiopsila Shatalkin. The morphology of the male genitalia of Xenopsila is discussed in detail, clarifying confused homologies and character polarities in the hypandrial complex. Evolutionary trends in the development of the hypandrium in the subfamily Psilinae are discussed.
    [Show full text]
  • A Thesis Submitted for the Degree of Doctor of Philosophy at Harper
    A Thesis Submitted for the Degree of Doctor of Philosophy at Harper Adams University Copyright and moral rights for this thesis and, where applicable, any accompanying data are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This thesis and the accompanying data cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder/s. The content of the thesis and accompanying research data (where applicable) must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holder/s. When referring to this thesis and any accompanying data, full bibliographic details including the author, title, awarding institution and date of the thesis must be given. HARPER ADAMS UNIVERSITY Minimising post-harvest losses in radishes through an understanding of pre and post-harvest factors that influence root splitting A thesis submitted in partial fulfilment of the requirements of Harper Adams University for the degree of Doctor of Philosophy by Rachel Anna Lockley BSc (hons) Biological Sciences at Harper Adams University, Newport, Shropshire, TF10 8NB June 2016 1. Declaration This thesis was composed by me and is a record of work carried out by me on an original line of research. All sources of information are shown in the text and listed in the references. None of this work has been presented/accepted for the award of any other degree or diploma at any University. Rachel Lockley June 2016 ii 2.
    [Show full text]