Zobrazeno 1 - 10
of 33
pro vyhledávání: '"R. P. Blackshaw"'
Autor:
R. P. Blackshaw, Peter Esbjerg
Publikováno v:
Journal of Applied Entomology. 142:272-276
Autor:
R. P. Blackshaw, J. P. Moore
Publikováno v:
Journal of Applied Entomology. 136:605-613
Larvae of Tipula paludosa (leatherjackets) are pests of grassland and cereals, and important prey items for a range of farmland birds. Their population dynamics from year to year have been the subject of study, but within-generation dynamics have rec
Autor:
R. P. Blackshaw, C. Coll
Publikováno v:
Integrated Pest Management Reviews. 4:145-162
Despite the large number of cranefly species only two have been convincingly associated with crop damage. The larvae of Tipula paludosa are commonly found as pests in both grassland and spring cereals whereas those of T. oleracea are only established
Autor:
R. P. Blackshaw, S. D'Arcy-Burt
Publikováno v:
Entomologia Experimentalis et Applicata. 84:17-25
The distribution of bibionid larvae in agricultural grassland was investigated. They tend to occur sporadically and at low population density. More detailed sampling within a field showed that numbers were highest adjacent to a hedgerow with most bei
Publikováno v:
Annals of Applied Biology. 129:355-360
Summary. Removal trapping was used to try and reduce numbers of the predatory planarian Artioposthia triangulata in polythene tunnels on a nursery and a grass field. Ten months of trapping in the tunnels failed to have any impact upon flatworm number
Publikováno v:
Rapid communications in mass spectrometry : RCM. 25(11)
The soil food web has been referred to as a 'black box', a 'poor man's tropical rainforest' and an 'enigma', due to its opacity, diversity and the limited insight into feeding specificity. Here we investigate the flow of C and N through the soil food
Autor:
S. D'arcy-Burt, R. P. Blackshaw
Publikováno v:
Annals of Applied Biology. 123:527-530
SUMMARY Three extraction methods were compared for the recovery of bibionid larvae from grassland soil samples. Only wet-sieving followed by flotation in a saturated salt solution yielded bibionids. No larvae were recovered either with modified Tullg
Autor:
Valerie I Stewart, R. P. Blackshaw
Publikováno v:
Annals of Applied Biology. 123:459-468
Summary Genetic variation in 12 populations of the terrestrial planarian Artioposthia triangulata from Northern Ireland and one in the Republic of Ireland were assessed using starch-gel electrophoresis. Seven enzymes - adenylate kinase, aspartate ami
Publikováno v:
Annals of Applied Biology. 122:1-8
Summary Thin layer agarose isoelectric focusing (IEF) was used to separate proteins from the larvae of Tipula oleracea Linnaeus and Tipula paludosa Meigen (Diptera, Nematocera). Silver staining revealed protein banding patterns which consistently dis
Autor:
D. Thompson, R. P. Blackshaw
Publikováno v:
Journal of Horticultural Science. 68:725-729
A series of experiments was conducted to investigate the effect of inclusion of bark in potting composts on the numbers of vine weevil larvae on polyanthus plants. In 1989 more larvae were recovered from plants grown in peat compost than those grown