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 2012-2013 winter indicate that Potato aphid flights ahould be slightly later than in an average year. Therefore, the number of aphids expected is likely to be slightly lower than normal and the risk of virus transmission to potato crops is not expected to be high. However, environmental conditions over the early summer will influence population development and monitoring of these webpages on a regular basis is recommended.
|First catch 2013||3 June||6 May||5 June|
|First catch prediction 2013||N/A||4 June||25 May|
|Mean date of first catch||14 June||31 May||22 May|
|Catch to 31 July||37||84||97|
|Predicted catch to 31 July 2013||N/A||36||38|
|Mean catch to 31 July||18||76||58|
Potato aphids in 2013
The peak of two weeks ago in the number of Potato aphids has dropped to more average figures over the last two weeks, with a total of 271 Potato aphids have now been caught in Scottish suction traps up to 11 August. This total ranks 10th when compared to the totals to the same date over the previous 30 years. Catches in all three traps are above the mean for this stage of the season.