All entries for Friday 17 May 2013
May 17, 2013
Update from Rothamsted on suction trap captures
Writing about web page http://www.rothamsted.ac.uk/insect-survey/Bulletins/2013WebBulletin3.pdf
Is it really May?
Bulletin week 3: 6 May ̶ 12 May started with two promising summer-like days but then quickly deteriorated with autumn-like gales, which severely restricted further aphid flight activity. Daytime temperatures hovered at or below aphid flight threshold levels. Very few field reports have been received, but there must be some aphids out there which are continuing to develop in readiness eventually for flight, should warm, still conditions return. The few aphids we did catch in the suction-traps this bulletin week were still mainly tree aphids: in particular, the first captures of the sycamore aphid, Drepanosiphum platanoidis, at four sites, a month later than 2012. A single glasshouse and potato aphid, Aulacorthum solani, was caught at Starcross, plus four shallot aphids, Myzus ascalonicus (Elgin 2, Preston 1 and Kirton 1).
Rosemary Collier
17 May 2013 20:41
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Update on pests at Wellesbourne
Today we found:
Carrot fly - 6 flies on 3 traps in the overwintered carrot plot and 41 flies on 3 traps in the new carrot plot - so a considerable increase on Tuesday's captures.
Cabbage root fly - 47 eggs on 15 plants - again an increase on Tuesday's count.
We also caught 1 silver Y moth (2 traps).
Rosemary Collier
17 May 2013 20:37
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