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Life Sciences Warwick Crop Centre

Yellow water traps and cabbage root fly eggs at Wellesbourne 2024

These are the numbers of pest insects captured in yellow water traps at Wellesbourne and numbers of cabbage root fly eggs laid on 15 cauliflower plants.

CRF = cabbage root fly; CSFB = cabbage stem flea beetle; cq = cabbage stem weevil; ca = cabbage seed weevil

Date CRF males CRF females CRF eggs (15 plants) Bean seed flies Pollen beetle Flea beetles Brassica weevils CSFB
29 Oct 4 1 0 1 0 0 1 cq 0
25 Oct 0 1 0 4 0 0 1 cq 0
22 Oct 3 1 0 7 0 0 0 0
18 Oct 5 2 0 1 0 6 1 cq 0
15 Oct 3 1 5 8 0 0 1 cq 0
11 Oct 3 1 3 0 0 0 2 cq 0
8 Oct 16 9 0 6 0 10 16 cq 0
4 Oct 2 2 2 6 0 1 3 cq, 1 ca 0
1 Oct 18 11 26 11 0 3 0 0
27 Sep 18 5 63 6 0 3 0 0
24 Sep 25 12 36 8 0 18 0 0
20 Sep 48 15 79 9 0 21 1 cq, 1 ca 0
17 Sep 127 48 183 7 0 19 0 0
13 Sep 32 21 15 16 0 16 0 0
10 Sep 126 66 0 16 0 113 0 0
6 Sep 31 2 2/2 (new plot) 6 0 20 0 0
3 Sep 53 21 3/6 (new plot) 15 1 129 2 cq 0
30 Aug 22 15 14/2 (new plot) 4 0 13 0 0
27 Aug 27 19 1 17 2 10 1 cq 0
23 Aug 16 11 12 2 1 10 0 0
20 Aug 19 5 11 2 0 31 0 0
16 Aug 5 4 4 6 4 24 2cq 0
13 Aug 12 10 9 3 13 48 2 cq 0
9 Aug 12 7 18 2 6 8 0 2
6 Aug 14 11 23 6 13 20 6 cq 0
2 Aug 12 7 80 9 2 34 6 cq 0
30 Jul 23 20 75 5 21 64 8 cq 3
26 Jul 0 3 12 0 8 119 3 cq 7
23 Jul 1 5 22 5 24 117 4 cq 4
19 Jul 1 3 10 4 20 68 14 cq 2
16 Jul 2 16 40 8 44 24 11 cq 0
12 Jul 4 10 23 (new) 4 14 2 6 cq 0
9 Jul 6 14 21 (old), 52 (new) 10 30 2 5 cq 0
5 Jul 10 16 24 (old), 8 (new) 13 16 1 1 cq 1
2 Jul 4 4

9 (old plants)

0 (new plants)

 12 26 1 1 cq 1
28 Jun 0 18 22 6 13 15 12 cq. 3 ca 2 csfb
25 Jun 1 20 3 4 19 21 21 cq, 5 ca 4
21 Jun 0 5 3 0 63 11 10 cq, 3 ca 4
18 Jun 1 14 8 13 15 36 14 cq 3
14 Jun 1 1 5 9 8 2 6 cq 2
11 Jun 0 3 14 11 11 4 4 cq 3
7 Jun 1 15 16 7 30 3 6 cq 6
4 Jun 3 7 11 1 25 22 18 cq , 1 ca 6
31 May 5 27 33 45 13 7 161 cq, 1 ca 4
28 May 29 35 29 15 8 14 16cq 3
24 May 2 1 59 25 1 1 2 cq 0
21 May 4 4 159 4 7 78 56 cq, 10 ca 3
17 May 2 1 273 6 9 2 6 cq 0
14 May 0 1 205 3 9 0 1 cq 8
10 May 7 1 122 0 15 3 5 cq, 1 ca 2
7 May 21 12 79 29 149 1 14 cq, 3 ca 4
3 May 36 5 71 12 290 1 40 cq 0
30 Apr 20 7 55 8 145 1 15 cq 0
26 Apr 21 7 34 15 23 1 0 0
23 Apr 23 15 51 (5 days) 38 77 7 8 cq 0
16 Apr 32 9 78 (5days) 20 156 0 1 cq 0
9 Apr 11 7 - 66 97 16 4 cq 1
2 Apr 15 4 - 80 153 5 19 cq 1
26 Mar 2 0 - 18 630 1 21 cq 0
19 Mar 0 0 - 36 138 2 5 cq 2
12 Mar 0 0 - 24 186 1 2 cq 0
5 Mar 1 0 - 21 5 1 0 1
27 Feb 0 2 - 18 1 0 0 0
20 Feb 0 0 - 28 9 0 0 1