Rothamsted suction trap samples for the week ending 18 May
Information on captures during the week ending 18 May has been released.
Aphid flight activity rose significantly as the weather warmed up, with both total numbers and diversity increasing this week. Aphid natural enemies are also increasing, particularly ladybirds.
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Numbers of peach–potato aphid (Myzus persicae) have increased dramatically this week, particularly in eastern and south eastern England, but none yet at Newcastle or north of the border.
- The potato aphid (Macrosiphum euphorbiae) was caught across the country in low numbers.
- The pea aphid (Acyrthosiphon pisum) was caught at eleven sites this week, with numbers highest in eastern England.
- The cabbage aphid (Brevicoryne brassicae) was caught at five sites this week in low numbers
- The willow carrot aphid (Cavariella aegopodii) migration increased substantially this week, with highest numbers at Kirton and Broom’s Barn.
- The currant-lettuce aphid (Nasonovia ribisnigri) was caught at 3 sites.
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The black bean aphid (Aphis fabae) was caught at 2 sites.
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