All entries for Friday 08 May 2015
May 08, 2015
Pest update from Wellesbourne
Today we found:
- 8 male and 4 female cabbage root flies (3 water traps)
- 248 bean seed flies (3 traps)
- 1 pollen beetle (3 traps)
- 313 carrot flies (3 traps) in our overwintered carrots - flies emerging from pupae in the soil
- 40 carrot flies (3 traps) in our new carrots - flies arriving from emergence site
- 39 cabbage root fly eggs (15 cauliflower plants)
We have also started to count the numbers of willow-carrot aphids on our new carrots and found 5 winged and 2 wingless aphids on 3 x 0.5 m lengths of row of carrot.
Rosemary Collier
08 May 2015 15:44
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Aphid bulletins
The latest editions of the Rothamsted Suction Trap Bulletin and AHDB Aphid News are attached. The information of interest to vegetable and salad growers is as follows:
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The first two peach–potato aphids (Myzus persicae) have been caught this week, with first arrivals at Kirton and Hereford. The individual at Hereford was particularly early, 3 - 4 weeks earlier than the 10yr average and forecast.
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A single potato aphid (Macrosiphum euphorbiae) has been caught this week at Silwood.
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No mealy cabbage aphids (Brevicoryne brassicae) or pea aphids (Acyrthosiphon pisum) have been caught in suction-traps so far this year.
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There have been further field reports of overwintering colonies of mealy cabbage aphids in winter oilseed rape crops in southern England (Dorset).
- The willow ̶ carrot aphid (Cavariella aegopodii) has been caught at four sites this week, with first arrivals at Silwood and Starcross.
Rosemary Collier
08 May 2015 13:22
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