July 01, 2015

FV 416b – cabbage root fly egg counts in Cornwall

The egg counts up to Monday 29th June are as follows - they show the mean numbers of eggs per week found around a sample of 20 plants per location:

  Helston Hayle Gwithian Truro St Columb
20-Apr 0.2 1.2 0.3 0.3 0.9
27-Apr 0.9 12.0 2.1 1.2 18.0
05-May 0.8 12.2 8.2 4.0 4.1
11-May 2.6 20.1 2.8 3.1 5.7
18-May 4.7 17.1 1.7 5.6 19.8
25-May 2.3 7.4 0.4 0.7 18.4
01-Jun 0.3 4.1 1.1 0.9 0.9
08-Jun 0.6 5.4 0.3 0.2 1.0
15-Jun 0.3 2.2 0.5 0.3 1.4
22-Jun 0.7 4.6 0.8 0.5 0.4
29-Jun 2.15 3.85 0.25 0.95 1.15

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