All entries for Friday 11 July 2014
July 11, 2014
Rothamsted suction trap captures – week ending 6 July
The most recent bulletin has just been released.
Generally aphid flight activity as monitored by the suction-traps was down this week, with the exception of the cereal aphids.
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Numbers of the peach–potato aphid (Myzus persicae) fell almost everywhere this week, with just a minor hotspot persisting at Wellesbourne.
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The potato aphid (Macrosiphum euphorbiae) was caught in low numbers at seven sites.
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The pea aphid (Acyrthosiphon pisum) has been caught at nine sites with a hotspot at Wellesbourne. Field reports indicate colonies present in many pea and bean crops.
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The cabbage aphid (Brevicoryne brassicae) was caught at eight sites in central and southern England.
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The black bean aphid, (Aphis fabae), was caught in nine suction-traps this bulletin week with a hotspot at Writtle (13).
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The currant-lettuce aphid (Nasonovia ribisnigri) was caught at 4 sites in low numbers.
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Numbers of willow-carrot aphid (Cavariella aegopodii) are low.