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.
|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 20 July||16||23||27|
|Predicted catch to 31 July 2014||N/A||N/A||N/A|
|Mean catch to 31 July||18||76||58|
Potato aphids in 2014
66 potato aphids have been caught in Scottish suction traps up to 20 July. This total ranks 16th out of the last 31 years.