Monitoring diamond-back moth in commercial crops 2018
This year several UK brassica growers are going to monitor diamond-back moths in their crops using pheromone traps. The results will be summarised on this web page.
If anyone else would like to contribute monitoring data to this site please contact .
See also the Syngenta Brassica Alert which has information on pest activity in Lincolnshire crops.
The table below summarises the numbers of moths captured in pheromone traps in commercial brassica crops in 7 regions.
| Date | Cornwall | Somerset & Devon | Warwickshire (2 traps) | Lincolnshire | Yorkshire | Lancashire | Scotland | ||
| 30 October | 0 | ||||||||
| 26 October | 0 | ||||||||
| 23 October | 0 | ||||||||
| 19 October | 0 | ||||||||
| 16 October | 0 | ||||||||
| 12 October | 0 | ||||||||
| 9 October | 0 | ||||||||
| 5 October | 0 | ||||||||
| 2 October | 0 | ||||||||
| 28 September | 0 | 0 | |||||||
| 25 September | 0 | ||||||||
| 21 September | 0 | 0 | |||||||
| 18 September | 0 | ||||||||
| 14 September | 0 | 0 | |||||||
| 11 September | 0 | ||||||||
| 7 September | 0 | 0 | None captured | ||||||
| 4 September | 0 | ||||||||
| 31 August | 0 | 0 Kirton 0 Spalding 1 Old Leake |
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| 28 August | 0 | ||||||||
| 24 August | 0 | 1 Kirton 1 Spalding 1 Old Leake |
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| 21 August | 0 | ||||||||
| 17 August | 1 | 1 Kirton 2 Spalding 1 Old Leake |
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| 14 August | 1 | ||||||||
| 13 August | 0 (Edenwood, Fife) 0 (Fife No 1) 0 (Fife No 2) 0 (Fife No 3) |
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| 10 August | Very high numbers in crops in Somerset. Trap counts 10-100+. Numbers lower in Devon (smaller plants). | 0 | 5 Kirton 4 Spalding 6 Old Leake |
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| 7 August | 2 | ||||||||
| 3 August | 1 | 2 Spalding 4 Old Leake |
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| 31 July | 2 | ||||||||
| 30 July | 0 Spalding 0 Kirton 2 Freiston 2 Old Leake |
0 (Fife No 1) | |||||||
| 27 July | 0 | ||||||||
| 24 July | 0 | ||||||||
| 23 July | 0 (Fife No 1) 0 (Fife No 3) |
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| 20 July | 0 Spalding 7 Kirton 5 Old Leake |
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| 19 July | 3 | Totals for 6 traps 9,8,5,6,4,5 | |||||||
| 17 July | 7 | ||||||||
| 16 July | 0 (Loch Leven) | ||||||||
| 15 July | 4 Spalding 45 Kirton 4 Old Leake |
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| 13 July | 6 | ||||||||
| 11 July | Totals for each of 6 traps 2,10,11,5,15,35 | ||||||||
| 10 July | 11 | ||||||||
| 9 July | 5 (Angus) |
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| 6 July | 6 | 23 (Old Leake 3 traps) 33 (Kirton 2 traps) 0 (Spalding 2 traps) |
0 (Loch Leven) 0 (Angus) 2 (Fife No 1) 0 (Montrose) 2 (Fife No 2) |
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| 5 July | 100-200 per trap | 58 on 2 traps | |||||||
| 3 July | 9 | ||||||||
| 2 July | 0 (Loch Leven) 0 (Angus) 2 (Fife No 1) 0 (Montrose) 32 (Fife No 2) |
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| 29 June | 5 | 1 (Kirton) 1 (Old Leake) |
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| 26 June | 3 | 18 on 6 traps | |||||||
| 25 June | 4 (Kirton) | 2 (Montrose) Fife No 3 installed |
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| 22 June | 0 | ||||||||
| 20 June | 3 (Kirton) 8 (Old Leake) |
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| 19 June | 3 | 36 on 6 traps | |||||||
| 18 June | 7 (Angus) 30 (Fife No 1) Loch Leven trap installed |
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| 15 June | 2 | 4 (Old Leake) | |||||||
| 14 June | 4 (Kirton) | 53 on 6 traps | |||||||
| 12 June | 5 (since 8 June) | ||||||||
| 11 June | 13 (Edenwood , Fife) Fife trap No 2 installed |
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| 8 June | 3 (since 5 June) | 1 (Kirton) | |||||||
| 5 June | 10 (since 1 June) | 135 (on 6 traps since 1 June) | |||||||
| 4 June | 5 (Angus) Montrose trap installed |
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| 1 June | 20 per trap | 10 (since 29 May) | 1 (Old Leake) 9 (Kirton) |
21 per trap since 29 May | |||||
| 31 May | Moths seen | ||||||||
| 30 May | 13 (in 6 traps since 25 May) | ||||||||
| 29 May | 5 (since 25 May) | 4 (Old Leake) 2 (Kirton) |
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| 28 May | 5 (Angus) Fife No 1trap installed |
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| 25 May | Moths seen | 0 (since 22 May) | 1 (since 15 May) | ||||||
| 22 May | 0 (since 18 May) | ||||||||
| 21 May | Angus trap installed | ||||||||
| 18 May | 0 (since 15 May) | ||||||||
| 15 May | No moths captured yet this year | 0 (since 11 May) | 3 (since 11 May) | No moths captured yet this year | |||||
| 11 May | 0 (since 8 May) | 0 (since 4 May) | 0 | ||||||
| 8 May | 1 (since 4 May) | 0 | |||||||
| 4 May | 0 (since 1 May) | 0 (since 27 Apr) | 0 (since 27 Apr) | ||||||
| 1 May | 0 (since 27 Apr) | 2 (since 27 Apr) | |||||||
| 27 Apr | 0 (since 24 Apr) | 2 (since 20 Apr) | |||||||
| 24 Apr | 1 (since 17 Apr) | ||||||||
| 23 Apr | Trap installed (Edenwood, Fife) | ||||||||
| 20 Apr | 0 (since 13 Apr) | 0 (since 13 Apr) | |||||||
| 17 Apr | 1 (since 10 April) |
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| 13 Apr | 0 (since 5 April) | 0 (since 9 April) | |||||||
| 10 Apr | 0 (since 3 April) | ||||||||
| 9 Apr | Traps set | ||||||||
| 5 Apr | Traps set | ||||||||
| 3 Apr | Traps set |
This activity is supported by the participating growers, FMC and AHDB.
Disclaimer
While the University or Warwick and the Agriculture and Horticulture Development Board seek to ensure that the information contained within this document is accurate at the time of production, no warranty is given in respect thereof and, to the maximum extent permitted by law, these organisations accept no liability for loss, damage or injury howsoever caused (including that caused by negligence) or suffered directly or indirectly in relation to information and opinions contained in or omitted from this document.
Because of the biological nature of the work it must be borne in mind that different circumstances and conditions could produce different results. Therefore, care must be taken with interpretation of the results, especially if they are used as the basis for commercial product recommendations.
