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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...
Read moreThe numbers of Brevicoryne brassicae and its parasites and predators in a crop of brussels sprouts were counted during a season. The results were grou...
Read moreDuring the winter of 1976-77, few pupae of Delia brassicae (Wied.) were removed by predators from either natural or introduced populations of pupae bu...
Read moreDispersal and host-foraging activity are important behavioural characteristics for parasitoid species used as biological control agents. Appropriate m...
Read moreThe 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...
Read moreAnnual 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...
Read moreAphid clones that feed on the same plant species for many generations often develop biotypes specifically adapted to the particular host-plant. Such b...
Read moreThe 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...
Read moreEmergence data on adults of Delia radicum from overwintering dormant pupae were used to develop a temperature-driven stage dynamics model to analyse d...
Read moreA 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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