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 2015-2016 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 2016||26 June||25 May||30 May|
|First catch prediction 2016||N/A||19 May||6 May|
|Mean date of first catch||14 June||1 June||24 May|
|Catch to 17 July 2016||4||17||14|
|Predicted catch to 31 July 2015||N/A||N/A||N/A|
|Mean catch to 31 July||18||73||57|
Potato aphids in 2016
35 potato aphids have been caught so far in 2016 - this total to 17 July ranks 23rd out of the last 30 years.