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Showing 23 results

Some effects of weed control on the numbers of the small cabbage white (Pieris rapae) on brussels sprouts.

Published online: 12 Sep 1970

Authors: Dempster, J. P.

Content type: Journal article

Journal title: Journal of Applied Ecology

The results of experiments conducted during 1968 showed that the presence of weed within the crop provides a suitable habitat for some of the ground-l...

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The effect of uncultivated land on the distribution of cabbage aphid (Brevicoryne brassicae) on an adjacent crop.

Published online: 03 Nov 1965

Authors: Van Emden, H. F.

Content type: Journal article

Journal title: Journal of Applied Ecology

The numbers of Brevicoryne brassicae and its parasites and predators in a crop of brussels sprouts were counted during a season. The results were grou...

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Mortality of overwintering pupae of the cabbage root fly (Delia brassicae).

Published online: 01 Jan 1981

Authors: Finch, S. & Skinner, G.

Content type: Journal article

Journal title: Journal of Applied Ecology

During the winter of 1976-77, few pupae of Delia brassicae (Wied.) were removed by predators from either natural or introduced populations of pupae bu...

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Using the stable isotope marker 44Ca to study dispersal and host-foraging activity in parasitoids.

Published online: 11 Oct 2006

Authors: Wanner, H. & Gu HaiNan & Hattendorf, B. & Günther, D. & Dorn, S.

Content type: Journal article

Journal title: Journal of Applied Ecology

Dispersal and host-foraging activity are important behavioural characteristics for parasitoid species used as biological control agents. Appropriate m...

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Egg-laying by some Dipterous pests of cultivated Cruciferae in north-east Scotland.

Published online: 29 Jun 1972

Authors: Shaw, M. W.

Content type: Journal article

Journal title: Journal of Applied Ecology

The following is virtually the author's summary. Dipterous eggs laid in the soil round the bases of plants in market-garden crops of cabbage and cauli...

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Studies on the weeds of vegetable crops. V. Final observations on an experiment with different primary cultivations.

Published online: 29 Oct 1966

Authors: Roberts, H. A. & Stokes, F. G.

Content type: Journal article

Journal title: Journal of Applied Ecology

Annual determinations were made of the numbers of viable weed seeds in the soil on plots of a 9-year experiment with vegetable crops in which 4 primar...

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Alate production by aphids on sugar beet: how likely is the evolution of sugar beet-specific biotypes?

Published online: 20 Apr 2000

Authors: Williams, I. S. & Dewar, A. M. & Dixon, A. F. G. & Thornhill, W. A.

Content type: Journal article

Journal title: Journal of Applied Ecology

Aphid clones that feed on the same plant species for many generations often develop biotypes specifically adapted to the particular host-plant. Such b...

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Factors affecting the aggregation of the adult cabbage root fly (Erioischia brassicae (Bouche)) at hedges.

Published online: 01 Jan 1974

Authors: Hawkes, C.

Content type: Journal article

Journal title: Journal of Applied Ecology

The effects of hedges and a lath barrier on the distribution of adults of Hylemya (Erioischia) brassicae (Bch.) in the field [cf. RAE/A60, 3692] was o...

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Overwintering in the cabbage root fly Delia radicum: a dynamic model of temperature-dependent dormancy and post-dormancy development.

Published online: 02 Jul 1997

Authors: Johnsen, S. & Gutierrez, A. P. & Jørgensen, J.

Content type: Journal article

Journal title: Journal of Applied Ecology

Emergence data on adults of Delia radicum from overwintering dormant pupae were used to develop a temperature-driven stage dynamics model to analyse d...

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A model for chemosterilization experiments with special reference to the cabbage root fly (Erioischia brassicae (Bouche)).

Published online: 01 Jan 1977

Authors: Hawkes, C. & Coaker, T. H.

Content type: Journal article

Journal title: Journal of Applied Ecology

A mathematical model is described that was developed to relate observed egg sterility in insects to other parameters of mating and reproduction, for u...

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