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The following is based largely on the author's summary. A study was made in eastern England in 1969-70 on aphidophagous Syrphids and Syrphid predation...Read more
The following is based largely on the author's summary. During investigations in Britain in 1968 on the effect of weed control on the incidence of Pie...Read more
The following is based almost entirely on the author's summary of this account of investigations in southern England in 1957-58. The numbers of Brevic...Read more
The presence of weeds within the crop provided a habitat which was more suitable for some of the arthropod predators of P. rapae. Harpalus rufipes was...Read more
Bees foraging for nectar on flowers of cultivars with deep corolla tubes and large floral parts found it difficult to reach the inner nectaries. They ...Read more
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 more
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...Read more
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...Read more
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...Read more
The following are virtually the author's summaries of these parts of a series on observations in central England [cf. RAE A 57 7969].
Following the us...
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