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Monitoring diamond-back moth in commercial crops 2020

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

18 September

Wellesbourne (Warwick)

0

2

0

15 September

Wellesbourne (Warwick)

0

2

0

11 September

Wellesbourne (Warwick)

0

2

0

8 September

Wellesbourne (Warwick)

0

2

0

4 September

Wellesbourne (Warwick)

0

2

0

1 September

Wellesbourne (Warwick)

0

2

0

28 August

Wellesbourne (Warwick)

0

2

0

28 August

Kirton, Spalding, Old Leake (Lincs)

0, 5, 7

1, 1, 1

0, 5, 7

25 August

Wellesbourne (Warwick)

0

2

0

21 August

Kirton, Spalding, Old Leake (Lincs)

1, 8, 18

1, 1, 1

1, 8, 18

21 August

Wellesbourne (Warwick)

0

2

0

18 August

Wellesbourne (Warwick)

0

2

0

14 August

Kirton, Spalding, Old Leake (Lincs)

1, 3, 3

1, 1, 1

1, 3, 3

14 August

Wellesbourne (Warwick)

0

2

0

11 August

Wellesbourne (Warwick)

0

2

0

7 August

Kirton, Spalding, Old Leake (Lincs)

0, 1, 3

1, 1, 1

0, 1, 3

7 August

Wellesbourne (Warwick)

0

2

0

5 August

Gwinear, Mithian, Coverack (Cornwall)

1, 2, 0

1, 1 1

1, 2, 0

4 August

Wellesbourne (Warwick)

0

2

0

31 July

Wellesbourne (Warwick)

0

2

0

31 July

Kirton, Spalding, Old Leake (Lincs)

1, 3, 4

2, 2, 2

0.5, 1.5, 2

29 July

Gwinear, Mithian, Coverack (Cornwall)

2, 2, 0

1, 1, 1

2, 2, 0

28 July

Wellesbourne (Warwickshre)

0

2

0

24 July

Kirton, Spalding, Old Leake (Lincs)

0, 2, 3

2, 2. 2

0, 1, 1.5

24 July

Wellesbourne (Warwickshre)

0

2

0

21 July

Wellesbourne (Warwickshre)

1

2

0.5

17 July

Kirton, Spalding, Old Leake (Lincs)

0, 1, 0

2, 2, 2

0, 0.5, 0

17 July

Wellesbourne (Warwickshre)

2

2

1

15 July

Gwinear, Mithian, Coverack (Cornwall)

1, 0, 1

1, 1, 1

1, 0, 1

14 July

Wellesbourne (Warwickshire)

0

2

0

10 July

Wellesbourne (Warwickshire)

0

2

0

10 July

Kirton, Spalding, Old Leake (Lincs)

1, 2, 2

2, 2, 2

0.5, 1, 1

8 July

Gwinear, Mithian, Coverack (Cornwall)

1,1,1

1,1,1

1,1,1

8 July

Gauldry, Angus

6

1

6

8 July

Coupar, Angus

3

1

3

7 July

Wellesbourne (Warwickshire)

0

2

0

6 July

Kelso, Scotland

15

1

15

3 July

Old Leake (Lincs)

5

2

2.5

3 July

Spalding (LIncs)

22

2

11

3 July

Kirton (Lincs)

1

2

0.5

3 July

Wellesbourne (Warwickshire)

2

2

1

30 June

Wellesbourne (Warwickshire)

1

2

0.5

26 June

Wellesbourne (Warwickshire)

6

2

3

26 June

Lincs (Old Leake)

2

2

1

26 June

Lincs (Spalding)

21

2

10.5

26 June

Lincs (Kirton)

2

2

1

25 June

Kelso (Scotland)

20

1

20

23 June

Lancashire

105 (69, 20, 5, 6, 5)

5

21

23 June

Wellesbourne (Warwickshire)

0

2

0

23 June

Cornwall (Gwinear)

1

1

1

23 June

Cornwall (Coverack)

0

1

0

23 June

Cornwall (Mithian)

1

1

1

22 June

Scotland (1)

281

10

28.1

22 June

Lincs (Spalding)

61

2

34.5

22 June

Lincs (Kirton)

2

2

1

22 June

Lincs (Old Leake) (since 19 June)

4

2

2

19 June

Wellesbourne (Warwick)

0

2

0

19 June

Lincs (Kirton)

1

2

0.5

19 June

Lincs (Spalding)

11

2

5.5

19 June

Lincs (Old Leake)

6

2

3

17 June

Cornwall (Mithian)

1

1

1

17 June

Cornwall (Gwinear)

1

1

1

17 June

Cornwall (Coverack)

2

1

2

16 June

Wellesbourne (Warwick)

1

2

0.5

15 June

Scotland (1)

82

14

5.9

15 June

Lincs (Spalding)

2

2

1

15 June

Lincs (Old Leake)

3

2

1.5

15 June

Links (Kirton)

2

2

1

12 June

Wellesbourne (Warwickshire)

2

2

1

10 June

Cornwall (Gwinear)

3

1

3

10 June

Cornwall (Mithian)

2

1

2

10 June

Cornwall (Coverack)

2

1

3

9 June

Wellesbourne, Warwick

0

2

0

5 June

Wellesbourne, Warwick

0

2

0

2 June

Cornwall (Gwinear)

3

1

3

2 June

Cornwall (Mithian)

1

1

1

2 June

Cornwall (Coverack)

1

1

1

2 June

Wellesbourne, Warwick

2

2

1

1 June Scotland (1) 46 7 6.6
29 May Wellesbourne, Warwickshire 0 2 0
29 May Lincolnshire None captured so far this year    
26 May Wellesbourne, Warwickshire 0 2 0
26 May Cornwall (Coverack) 2 1 2
26 May Cornwall (Mithian) 0 1 0
26 May Cornwall (Gwinear) 0 1 0
25 May Scotland (1) 10 8 1.25
22 May Wellesbourne, Warwickshire 0 2 0
21 May Lancashire 6 6 1
19 May Cornwall (Gwinear) 0 1 0
19 May Cornwall (Mithian) 0 1 0
19 May Cornwall (Coverack) 1 1 1
18 May Scotland (1) 0 8 0
12 May Cornwall (Gwinear) 1 1 1
12 May Cornwall (Mithian) 1 1 1
12 May Cornwall (Coverack) 5 1 5
11 May Scotland (1) 0 4 0
7 May Lancashire 0 4 0
6 May Cornwall (Coverack) 0 1 0
4 May Scotland 0 4 0
4 May Cornwall (1)(Gwinear) 1 1 1
4 May Cornwall (Mithian) 1 1 1
29 April Cornwall (Coverack) (from 20 April) 3 1 3
28 April Cornwall (Gwinear) (from 20 April) 1 1 1
27 April Cornwall (Mithian) (from 20 April) 3 1 3
27 April Lancashire 4 4 1
20 April Lancashire 0 3 0
14 April Lancashire 5 3 1.7

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.1

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