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  • 1
    Electronic Resource
    Electronic Resource
    Classification of water beetle assemblages in arable fenland and ranking of sites in relation to conservation value (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Freshwater biology 22 (1989), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SUMMARY. 1. Water beetles were recorded from 157 sites around the Wash, England, in 1986. Most sites were ditches in arable land. Eight main types of water beetle assemblage were identified by multivariate analysis. The habitats of these assemblages were characterized by measurement of a range of physical and chemical factors.2. Of the 130 species recorded, four are listed in the British Red Data Book and a further thirty-five are rated as Nationally Notable. Records from 1904 to 1938 for the same area indicate that only three species have been lost in the subsequent period of intensification of water management and arable farming. A rich water beetle fauna can thus survive in drainage systems in arable fen.3. Vegetation management was important in maintaining the ‘species quality score’, proposed as a measure of conservation value, of larger ditches but management reduced the species quality of one type of assemblage associated with smaller ditches. One type of assemblage was found only in ditches subject to management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2427.1989.tb01109.x
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  • 2
    Electronic Resource
    Electronic Resource
    Peach-potato Aphid, Myzus persicae (Sulz.), Resistant to Organophosphorus and Carbamate Insecticides on Potatoes in Scotland (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 26 (1977), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Peach-potato apbids, Myzus persicae (Sulz.), collected from six potato fields in western and central Scotland in 1976 were tested for aphicide resistance biochemically and by bioassay. Most aphids were resistant to organophosphorus insecticides. At five of the sites, some aphids were both highly resistant to organophosphorus compounds and moderately resistant to pirimicarb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1977.tb01024.x
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  • 3
    Electronic Resource
    Electronic Resource
    A New Biotype of Red Spider Mite (Tetranychus urticae (Koch)) causing Atypical Damage to Tomatoes. (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 27 (1978), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1978.tb01073.x
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  • 4
    Electronic Resource
    Electronic Resource
    The role of Poa annua in the epidemiology of barley yellow dwarf virus in autumn-sown cereals (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 43 (1994), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Studies of cereal aphids and barley yellow dwarf virus (BYDV) from 1989 to 1992 revealed that Poa annua is an abundant weed of commercial winter barley crops during the summer months. P. annua was frequently infected with BYDV, and there were usually similarities with the BYDV infection of the surrounding barley crop. These P. annua weeds were often infested by cereal aphids both in July (pre-harvest) and in September (in cereal stubble fields). Poa-infested cereal stubbles may be major local sources of viruliferous aphids, increasing the risk of BYDV in nearby winter cereals. P. annua plays an important role in the epidemiology of S. avenae-transmitted BYDV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1994.tb01599.x
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  • 5
    Electronic Resource
    Electronic Resource
    Problems in Cucumber Crops caused by Slugs, Cuckoo-spit Insect, Mushroom Cecid, Hairy Fungus Beetle and the House Mouse. (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 26 (1977), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1977.tb01035.x
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  • 6
    Electronic Resource
    Electronic Resource
    Survey of Pests of Glasshouse Tomato Crops in Lanarkshire, 1974–77, with Special Reference to the Biological Control of Glasshouse Whitefly (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 27 (1978), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Tomato crops in Lanarkshire, Scotland, were surveyed in 1974–77 to assess the incidence of glasshouse whitefly (Trialeurodes vaporariorum (Westw.)), glasshouse red spider mite (Tetranychus urticae (Koch)) and tomato moth (Lacanobia oleracea (L.)). Glasshouse red spider mite infested 65–76 per cent of the cropped area but glasshouse white-fly, which affected 62–65 per cent of the cropped area, was the most damaging pest. The survey indicated the success of biological control of whitefly by its parasite, Encarsia formosa Gahan, in 1977 and demonstrated the potential for biological control by contract operators. The percentage of holdings with fruit damaged by tomato moth increased from 4 in 1974 to 23 in 1977.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1978.tb01084.x
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  • 7
    Electronic Resource
    Electronic Resource
    Transmission of barley yellow dwarf virus by cereal aphids collected from different habitats on cereal farms (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 43 (1994), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Cereal aphids were collected from cereal crops, from Poa annua within cereal fields, from Lolium perenne pastures and from wild grasses in hedge bottoms and around farm buildings. The frequency of barley yellow dwarf virus (BYDV) transmission was assessed by aphid transmission tests. There were differences in transmission rates between aphid species, between host species and between years. The transmission rates of Rhopalosiphum padi from the different host species were broadly similar whereas for Sitobion avenae, P. annua within cereal fields was significantly better than the other host species. Wild grasses other than P. annua were relatively poor sources of virus. A large percentage of aphids frequently transmitted more than one strain, suggesting that host plants are often infected with more than one BYDV strain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1994.tb01598.x
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  • 8
    Electronic Resource
    Electronic Resource
    Distribution of aquatic macroinvertebrates within peatland pool complexes in the Flow Country, Scotland (1998)
    Springer
    Hydrobiologia 377 (1998), S. 95-105 
    Details
    ISSN: 1573-5117
    Keywords: peatland pools ; invertebrates ; Coleoptera ; Hemiptera ; spatial variation ; body size
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Stationary water traps were used to sample the aquatic invertebrates from both shallow, drought-sensitive pools and deeper, more permanent pools on blanket bog in the Flow Country, northern Scotland during 1994–1995, an area important for nature conservation. The differences in numbers of invertebrates trapped, and the differences in species composition and abundance of adult aquatic Coleoptera and Hemiptera (the two most abundant groups caught) between these two pool types, and spatially within the deeper pools, were investigated. Using the same trapping effort, seven times more invertebrates and five times more adult Coleoptera were taken in the deep (A4) pools compared to the shallow (A3) pools, and Hemiptera were almost exclusively trapped in the A4 pools (only 2% of the catch was from A3 pools). DECORANA showed that the Coleoptera species composition of the two pool types was different, although a small overlap existed, presumably because of the proximity of the pool types and of the continuous nature of the variation between them. There was little difference in the numbers taken or species composition of Coleoptera or Hemiptera from the edges or centre of the A4 pools. Smaller Coleoptera species were found in both pool types, although one species was more common in the centre of the larger pools. Larger Coleoptera with a body length of more than 11.6 mm were not found in the A3 pools, only in the deeper A4 type. The A4 pools were found to be more stable seasonally than the shallow pools with respect to invertebrate numbers trapped, and this may be linked to the chance of drying out of the latter in dry periods. The influence of pool stability (through water level) on invertebrate abundance, development and individual species size is discussed, as is the sampling method used, the significance of the peatland fauna and its importance to breeding bird life associated with peatland pool complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003267022820
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  • 9
    Electronic Resource
    Electronic Resource
    The running-water beetles (Coleoptera) of a river catchment in northern England (1993)
    Springer
    Hydrobiologia 264 (1993), S. 33-45 
    Details
    ISSN: 1573-5117
    Keywords: Water beetles ; running-water ; substrate structure ; pH ; logistic regression ; strategies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 202 running-water sites in the catchment of the River Rede, a tributary of the River Tyne in northern England, were sampled for invertebrates in 1990. The distributions of water beetle species were investigated using logistic regression with several environmental factors. A number of site structure characteristics were assessed and the presence or absence of silt (as peat or clay) was found to be the most important single variable. Shingle, pebbles, cobbles, boulders and the amount of vegetation present were less important substrate variables. The distance from stream source reflected substrate structure and site gradient was a poor determinant of species distribution. A composite variable, termed the exposure index, was derived from all the site structure characteristics using an ordination and was found to be useful in explaining species distribution. Water pH also affected distributions considerably. Two variable analyses using the exposure index and water pH gave the best explanation of species distribution. The two variables used together were a reflection of productivity and disturbance, the two main components of habitat templates and strategy theory. The distribution of water beetle species in the Rede catchment was a product of these factors, which, in turn, were a product of the geography of the catchment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014662
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  • 10
    Electronic Resource
    Electronic Resource
    Some observations onStrongwellsea castrans [Zygomycetes: Entomophthorales], a parasite of root flies [Delia spp.], in the south of Scotland (1986)
    Springer
    BioControl 31 (1986), S. 91-97 
    Details
    ISSN: 1573-8248
    Keywords: Insects ; traps ; allyl isothiocyanate ; Strongwellsea castrans ; Delia ; Brassica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les mouches des racines,Delia radicum (L.) etD. floralis (Fallén) [Diptera: Anthomyiidae] attrapées dans la culture du rutabaga dans le sud de l'Écosse, étaient contaminées parStrongwellsea castrans Batko & Weiser [Zygomycetes: entomophthorales]. Le pathogène était surtout associé aux fe nelles de la lère et de la 2ème générations deD. radicum et de la seule génération deD. floralis. Les cas de maladie montraient avec retard leur dépendance avec la densité des mouches. Les niveaux d'infection les plus grands étaient enregistrés pendant la saison la plus froide et la plus humide. Les bordures en friche des parcelles hébergeaient de plus grandes proportions deD. radicum infectés que les cultures. Des pièges jaunes sans appât ont attrapé de plus grandes proportions de mouches que lorsqu'ils étaient appâtés avec de l'huile de moutarde (allyl-isothiocyanate). Les raisons qui expliquent pourquoi les niveaux d'infection en Écosse sont plus élevés qu'ailleurs sont discutées.
    Notes: Abstract Root flies,Delia radicum (L.) andD. floralis (Fallén) (Diptera: Anthomyiidae), trapped in swede crops in the south of Scotland, were infected withStrongwellsea castrans Batko and Weiser (Zygomycetes: Entomophthorales). The pathogen was associated mainly with females of the 1st and 2nd generations ofD. radicum and of the single generation ofD. floralis. Disease incidence showed time-lagged density dependence. Greatest sustained infection levels were recorded in the coolest wettest season. Higher proportions ofD. radicum were infected in the headland than in the crop. Unbaited yellow water traps caught greater proportions of infected flies than traps baited with mustard oil (allyl isothiocyanate). The reasons for high levels of infection in Scotland are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02390923
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