Výsledky vyhledávání - "B. N. K. Davis"

Studies on the toxicity of insecticidal drift to the first instar larvae of the Large White butterfly Pieris brassicae (Lepidoptera: Pieridae)

Autor: S. N. Sinha, K. H. Lakhani, B. N. K. Davis

Publikováno v: Annals of Applied Biology. 116:27-41

Summary The toxicity (LD,) of eight insecticides to 2–day-old first instar larvae of Pieris brassicue was determined by topical application. On this basis, the insecticides could be ranked in ascending order viz. dimethoate > pirimicarb > phosalone

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29cff31138352ff7d301d26c118b7121
https://doi.org/10.1111/j.1744-7348.1990.tb06584.x

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Experiments on the Effects of Fertilizer and Rabbit Grazing Treatments Upon the Vegetation of a Limestone Quarry Floor

Autor: M. C. Brown, B. N. K. Davis, K. H. Lakhani

Publikováno v: The Journal of Applied Ecology. 30:615

A study is described in which two very low levels of fertilizer application and three levels of rabbit grazing treatments were used to accelerate the colonization of a limestone quarry floor from an initial mean vegetation cover of 21-4%. A factorial

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e96ec0f01256eba1f38b59b31c9a88e5
https://doi.org/10.2307/2404241

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Chalk and limestone quarries as wildlife habitats

Autor: B. N. K. Davis

Publikováno v: Minerals and the Environment. 1:48-56

Natural recolonisation by volunteer species of chalk and limestone quarries has led to the development of attractive and species-rich communities in many parts of the United Kingdom. These communities have a basic similarity in floristic composition

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ddd5f15c0a4b2fca51fe916f804ff3c2
https://doi.org/10.1007/bf02010717

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The European distribution of insects on stinging nettles,Urtica dioicaL.: A field survey

Autor: B. N. K. Davis

Publikováno v: Bolletino di zoologia. 56:321-326

A survey tour was made to examine the insect fauna of Urtica dioica in central and southern Europe and compare it with that in Britain. Forty‐five sites were sampled mainly in Italy and southern Germany. The range of habitats occupied by U. dioica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::073e86518b7de0687dcc048610637713
https://doi.org/10.1080/11250008909355658

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The immediate and long-term effects of the herbicide MCPA on soil arthropods

Autor: B. N. K. Davis

Publikováno v: Bulletin of Entomological Research. 56:357-366

Plots on arable land in southern England that had received an annual application of MCPA herbicide for 10 out of 13 years between 1951 and 1963, and similar untreated plots, were sampled to see whether there were any long-term or short-term effects o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::245949f57bf1039dc3e52c39be3578dd
https://doi.org/10.1017/s0007485300056443

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The soil macrofauna and organochlorine insecticide residues at twelve agricultural sites near Huntingdon

Autor: B. N. K. Davis

Publikováno v: Annals of Applied Biology. 61:29-45

SUMMARY Ten arable fields and two apple orchards were chosen from a total of thirty-five sites visited to represent typical soils, crop rotations and insecticide applications in the Huntingdon area of East Anglia. Pitfall traps were used to collect i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f902bc699496628e61db9fa51ada2e58
https://doi.org/10.1111/j.1744-7348.1968.tb04507.x

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Organochlorine insecticide residues in soil invertebrates

Autor: R. B. Harrison, B. N. K. Davis

Publikováno v: Nature. 211(5056)

THE uptake and transmission of organochlorine insecticide residues in food chains has been described for an aquatic ecosystem1. There is, however, little information relating to the terrestrial sphere in respect of insecticide concentrations occurrin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba66f6d3392cf32b8daab69a5ef8f18f
https://pubmed.ncbi.nlm.nih.gov/5969849

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