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Potato Aphid


The Potato aphid Macrosiphum euphorbiae is often the most numerous of the five or six species of aphids that regularly colonize potato crops in Scotland. It is also a potential aphid vector of non-persistent potato viruses (e.g. PVY, PVA).

As with Peach-Potato aphids Myzus persicae, predictions made following the 2013-2014 winter indicate that Potato aphid flights should be 2-3 weeks earlier than in an average year.  Therefore, the number of aphids expected is likely to be higher than normal and the risk of virus transmission to potato crops may be higher than average. However, environmental conditions over the early summer will influence population development, and monitoring of these webpages on a regular basis is recommended.

Table

 M. euphorbiae Elgin Dundee Edinburgh
First catch 2014 26 April 17 May  29 April
First catch prediction 2014 N/A 13 May 8 May
Mean date of first catch 14 June 1 June 24 May
Catch to 27 July 16 26 30
Predicted catch to 31 July 2014 N/A N/A N/A
Mean catch to 31 July 18 76 58

 

Potato aphids in 2014

72 potato aphids have been caught in Scottish suction traps up to 27 July. This total ranks 20th out of the last 31 years.

  Potato aphids in the Elgin, Dundee and Edinburgh traps



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