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Life Sciences Warwick Crop Centre

Yellow water traps and cabbage root fly eggs at Wellesbourne 2023

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

Date CRF males CRF females CRF eggs (15 plants) Bean seed flies Pollen beetle Flea beetles Brassica weevils CSFB
3 November

2

 0 0 23 1 1 0 0
31 October

7

 4 0 10 0 1 3 0
27 October

10

 6 0 11 2 4 8 1
24 October

8

 7 0 26 4 1 10 0
20 October

3

 1 1 14 0 0 0 0
17 October

13

 10 1 21 2 2 0 0
13 October

3

 3 8 16 0 4 0 3
10 October

6

 7 1 12 1 12 31 4
6 October

0

 5 1 13 1 7 1 0
3 October

5

 5 1 7 0 11 9 7
29 September

5

 13 14 8 0 8 0 1
26 September

24

 46 10 28 2 14 1 1
22 September

50

 106 26 30 0 12 0 0
19 September

114

 152 40 30 1 13 0 1
15 September

87

 83 76 23 0 21 0 1
12 September

78

 55 65 28 2 35 0 2
8-September

16

 24 34 26 1 61 0 4
5-September-23

40

 57 62 21 3 81 0 3
1-September-23

72

 116 155 25 0 41 0 0
29-August-23

158

 169 105 16 3 46 2 0
25-August-23

187

 184 7 16 7 80 0 1
22-August-23

168

 128 32 37 3 119 1 1
18-August-23

85

 49 62 22 7 66 1 0
15-August-23

128

 48 117 11 4 57 2 1
11-August-23

103

 35 22 17 12 42 0 2
8-August-23

134

 46 40 29 46 36 1 0
4-August-23

53

 26 14 15 133 43 5 0
1-August-23

57

 42 49 20 68 61 4 7
28-July-23

52

 60 88 26 203 66 18 6
25-July-23

39

 128 77 27 199 41 35 5
21-July-23 16 71 150 37 548 36 102 1
18-July-23 27 106 62 19 149 11 16 0
14-July-23 60 87 333 16 226 27 17 2
11-July-23 56 99 605 24 232 54 57 7
7-July-23 50 57 164 17 169 11 20 0
4-July-2023 34 22 184 28 63 5 4 0
30-Jun-23 23 11 65 4 225 29 35 0
27-Jun-23 27 19 23 10 74 26 13 0
23-Jun-23 13 8 39 4 109 148 13 0
20-Jun-23 3 5 35 4 5 177 8 0
16-Jun-23 2 10 11 3 3 156 17 0
13-Jun-23 3 5 0 4 2 159 15 1
9-Jun-23 3 5 0 11 2 14 0 0
6-Jun-23 0 0 0 2 2 10 2 0
2-Jun-23 2 2 2 27 0 0 0 0
30-May-23 2 4 15 15 1 27 4 0
26-May-23 1 2 8 6 2 11 5 0
23-May-23 3 9 9 15 0 10 7 6
19-May-23 34 16 42 48 20 57 22 6
16-May-23 0 3 68 5 18 0 2 2
12-May-23 16 3 47 5 10 0 2 0
09-May-23 137 28 60 65 50 0 11 0
05-May-23 41 9 71 5 12 0 2 0
02-May-23 191 28 - 118 213 0 12 0
25-Apr-23 125 9 - 77 15 0 5 0
18-Apr-23 67 12 - 65 40 0 14 0
11-Apr-23 16 5 - 69 176 0 25 0
04-Apr-23 1 0 - 81 168 0 7 0
28-Mar-23 0 1 - 9 14 0 6 0
21-Mar-23 0 0 - 14 25 0 18 0
14-Mar-23 0 0 - 14 0 0 0 0