Yellow water traps and cabbage root fly eggs at Wellesbourne 2026
These are the numbers of pest insects captured in yellow water traps at Wellesbourne.
CRF = cabbage root fly; CSFB = cabbage stem flea beetle; cq = cabbage stem weevil; ca = cabbage seed weevil
| CRF males | CRF females | CRF eggs (15 plants) | Bean seed flies | Pollen beetle | Flea beetles | CQ | CA | CSFB | Small white butterfly | Large white butterfly | Ladybird adults | Turnip sawfly | ||
| 24-Mar | 0 | 1 | - | 0 | 128 | 37 | 34 | 1 | 1 | 0 | 0 | 4 | 0 | |
| 31-Mar | 13 | 4 | - | 4 | 10 | 8 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | |
| 07-Apr | 2 | 2 | - | 4 | 15 | 16 | 24 | 0 | 0 | 0 | 0 | 3 | 0 | |
| 10-Apr | 6 | 3 | - | 0 | 14 | 23 | 18 | 15 | 0 | 0 | 0 | 2 | 0 | |
| 14-Apr | 21 | 11 | - | 14 | 8 | 2 | 9 | 3 | 0 | 0 | 0 | 0 | 0 | |
| 17-Apr | 25 | 10 | - | 16 | 28 | 7 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 21-Apr | 13 | 8 | - | 13 | 15 | 7 | 2 | 4 | 0 | 0 | 0 | 1 | 0 | |
| 21-Apr | New swede plot | 24 | ||||||||||||
| 24-Apr | 5 | 5 | - | 11 | 33 | 3 | 3 | 2 | 0 | 0 | 0 | 2 | 0 | |
| 24-Apr | New swede plot | 27 | 3 | 21 | 8 | 2 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 28-Apr | 0 | 5 | - | 0 | 32 | 13 | 19 | 6 | 0 | 0 | 0 | 5 | 0 | |
| 28-Apr | New swede plot | 1 | 0 | 27 | 2 | 7 | 19 | 11 | 0 | 0 | 0 | 0 | 0 | 0 |
| 01-May | 2 | 1 | - | 5 | 31 | 1 | 7 | 1 | 0 | 0 | 0 | 1 | 0 | |
| 01-May | New swede plot | 15 | 2 | 28 | 13 | 0 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 |
| 05-May | 3 | 3 | - | 4 | 22 | 1 | 6 | 4 | 0 | 0 | 0 | 6 | 0 | |
| 05-May | New swede plot | 10 | 1 | 17 | 1 | 3 | 5 | 6 | 0 | 0 | 0 | 0 | 0 | 0 |
| 08-May | 5 | 0 | - | 3 | 0 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 08-May | New swede plot | 0 | 2 | 24 | 1 | 15 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
| 12-May | 3 | 0 | - | 2 | 12 | 2 | 4 | 3 | 0 | 0 | 0 | 5 | 0 | |
| 12-May | New swede plot | 3 | 0 | 18 | 1 | 13 | 14 | 8 | 2 | 0 | 0 | 0 | 1 | 0 |
| 15-May | 0 | 0 | - | 4 | 5 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 15-May | New swede plot | 6 | 3 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 19-May | 4 | 0 | - | 0 | 5 | 1 | 3 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 19-May | New swede plot | 4 | 3 | 15 | 15 | 4 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
| 22-May | New swede plot | 0 | 1 | 9 | 1 | 109 | 13 | 14 | 5 | 0 | 0 | 0 | 0 | 0 |
| 26-May | New swede plot | 0 | 0 | 0 | 18 | 267 | 52 | 2 | 0 | 0 | 0 | 17 | 4 | |
| 29-May | New swede plot | 4 | 7 | 0 | 1 | 22 | 285 | 12 | 3 | 0 | 0 | 0 | 13 | 1 |
| 02-Jun | New swede plot | 0 | 3 | 1 | 4 | 38 | 316 | 20 | 0 | 1 | 0 | 0 | 13 | 3 |
| 05-Jun | New swede plot | 0 | 8 | 0 | 3 | 144 | 24 | 6 | 0 | 0 | 0 | 0 | 1 | 3 |