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A study was carried out to quantify the effects of a warmer winter climate on the egg mortality (and, consequently, the risk of an outbreak) of Epirri...
Read moreIn apple orchards, the use of pesticides such as pyrethroids for the control of lepidopteran and dipteran pests can severely disturb natural equilibri...
Read moreLaboratory experiments were carried out to analyse various aspects of spider performance under different diets, focusing mainly on the value of the ap...
Read moreThe distribution of Urophora affinis (Frnf.) and U. quadrifasciata (Wied.) among the flower heads of diffuse (Centaurea diffusa) and spotted (C. macul...
Read morePopulations of Aphis fabae were monitored in the UK in 1969-86 on its primary winter host (Euonymus europaeus), on the 2 principal secondary summer cr...
Read moreA simple but general model of density-dependent dispersal in an arthropod population is used to explain the relationship between the density and the s...
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 following is virtually the author's summary. Studies were carried out in 1958-62 on some of the factors that affect the formation of bands of hopp...
Read moreThe following is virtually the author's summary of this part of a series on investigations in south-eastern England [cf. RAE A 57 889, etc.]. The effe...
Read moreThe 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...