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Monitoring diamond-back moth in commercial crops 2021

As in previous years, several UK brassica growers and agronomists are monitoring 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 rosemary dot collier at warwick dot ac dot uk.

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 plus other observations.
 Date Location Number of moths Number of traps Mean number of moths per trap
12 Oct Wellesbourne, Warwick 0 2 0
8 Oct Wellesbourne, Warwick 0 2 0
5 Oct Wellesbourne, Warwick 0 2 0
1 Oct Wellesbourne, Warwick 0 2 0
28 Sep Wellesbourne, Warwick 0 2 0
24 Sep Wellesbourne, Warwick 0 2 0
21 Sep Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
21 Sep Wellesbourne, Warwick 0 2 0
17 Sep Wellesbourne, Warwick 0 2 0
15 Sep Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 2 4 0.5
14 Sep Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
14 Sep Wellesbourne, Warwick 0 2 0
10 Sep Wellesbourne, Warwick 1 2 0.5
8 Sep Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 0 4 0
7 Sep Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
7 Sep Wellesbourne, Warwick 0 2 0
3 Sep Wellesbourne, Warwick 0 2 0
1 Sep Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 1 4 0.25
31 August Wellesbourne, Warwick 0 2 0
27 August Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
27 August Wellesbourne, Warwick 0 2 0
24 August Wellesbourne, Warwick 0 2 0
20 August Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
20 August Wellesbourne, Warwick 0 2 0
18 August Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 17 4 4.25
17 August Wellesbourne, Warwick 0 2 0
13 August Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
13 August Wellesbourne, Warwick 0 2 0
11 August Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 6 4 1.5
10 August Wellesbourne, Warwick 0 2 0
6 August Lincolnshire (Kirton, Old Leake, Gosberton) 5 3 1.7
6 August Wellesbourne, Warwick 0 2 0
3 August Wellesbourne, Warwick 0 2 0
29 July Lancashire 23 6 3.8
28 July Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 27 4 6.75
27 July Wellesbourne, Warwick 0 2 0
26 July Scotland 81 10 8.1
23 July Wellesbourne, Warwick 0 2 0
22 July Lancashire 19 6 3.1
22 July Lincolnshire (Kirton, Old Leake, Gosberton) 1 3 0.3
22 July Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 28 (21 at one site) 4 7
20 July Wellesbourne, Warwick 0 2 0
19 July Scotland 41 10 4.1
16 July Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 26 (23 at one site) 4 6.5
16 July Wellesbourne, Warwick 0 2 0
15 July Lancashire 28 6 4.6
15 July Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
13 July Wellesbourne, Warwick 0 2 0
12 July Scotland 35 10 3.5
12 July Lancashire 26 6 4.3
9 July Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 2 4 0.5
9 July Wellesbourne, Warwick 1 2 0.5
8 July Lincolnshire (Kirton, Old Leake, Gosberton) 3 3 1
6 July Wellesbourne, Warwick 4 2 2
5 July Scotland 26 10 2.6
5 July Lancashire 22 6 3.6
2 July Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 5 4 1.25
2 July Wellesbourne, Warwick 0 2 0
1 July Lincolnshire (Kirton, Old Leake, Gosberton) 3 3 1
29 June Wellesbourne, Warwick 1 2 0.5
28 June Scotland 13 10 1.3
25 June Lancashire 18 6 3
25 June Wellesbourne, Warwick 0 2 0
24 June Lincolnshire (Kirton, Old Leake, Gosberton) 16 3 5.3
24 June Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 0 4 0
22 June Wellesbourne, Warwick 2 2 1
21 June Scotland 26 10 2.6
18 June Lancashire 28 6 4.6
18 June Wellesbourne, Warwick 3 2 1.5
17 June Lincolnshire (Kirton, Old Leake, Gosberton) 5 3 1.7
15 June Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 7 4 1.7
14 June Scotland 9 10 0.9
11 June Wellesbourne, Warwick 4 2 2
11 June Lancashire 28 6 4.7
10 June Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
10 June Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 0 4 0
8 June Lancashire 2 6 0.3
8 June Wellesbourne, Warwick 5 2 2.5
7 June Scotland 5 8 6.25
4 June Wellesbourne, Warwick 3 2 1.5
3 June Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 3 3 1
3 June Lincolnshire (Kirton, Old Leake, Gosberton) 4 3 1.3
1 June Lancashire 0 6 0
1 June Wellesbourne, Warwick 0 2 0
31 May Scotland 0 8 0
28 May Wellesbourne, Warwick 0 2 0
27 May Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 0 4 0
25 May Lancashire 8 3 2.7
25 May Wellesbourne, Warwick 0 2 0
24 May Scotland 0 8 0
21 May Wellesbourne, Warwick 0 2 0
20 May Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 0 4 0
18 May Wellesbourne, Warwick 1 2 0.5
14 May Wellesbourne, Warwick 0 2 0
13 May Lincolnshire (Kirton, Old Leake, Gosberton) 8 3 2.7
13 May Cornwall (Gwinear, Mithian, Cury Cross, Veryan) 1 4 0.25
11 May Wellesbourne, Warwick 0 2 0
7 May Wellesbourne, Warwick 0 2 0
6 May Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
6 May Cornwall (Gwinear, Mithian, Veryan) 2 3 0.67
4 May Wellesbourne, Warwick 0 2 0
30 Apr Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
30 Apr Wellesbourne, Warwick 1 2 0.5
29 Apr Cornwall (Gwinear, Mithian, Cury Cross) 3 3 1
27 Apr Wellesbourne, Warwick 0 2 0
23 Apr Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
23 Apr Wellesbourne, Warwick (set up 20 Apr) 1 2 0.5
22 Apr Cornwall (Gwinear, Mithian, Cury Cross) 4 3 1.2
16 Apr Lincolnshire (Kirton, Old Leake, Gosberton) 0 3 0
14 Apr Gwinear, Cornwall 1 1 1

This activity is supported by the participating growers and agronomists, 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.

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