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, early season predictions made following the 2016-2017 winter indicated that Potato aphid flights should be earlier than in an average year. Therefore, there is the potential for total catches of Potato aphids to be relatively high and consequently the risk of virus transmission within potato crops colonised by Potato aphids could be higher than normal. However, environmental conditions over the early summer do influence population development, and growers should monitor how the populations of this species develop over the season.
|First catch 2017||29 April||9 May|
|First catch prediction 2017||22 May||10 May|
|Mean date of first catch||1 June||24 May|
|Catch to 31 July 2017||26||75|
|Predicted catch to 31 July 2017||N/A||N/A|
|Mean catch to 31 July||73||57|
Potato aphids in 2017
A total of 103 potato aphids have been caught so far in 2017 - this total to 17 September ranks 21st out of the last 30 years.