Diamondback moth sightings 2024

As in previous years we are summarising records of sightings of migrant moths (diamond-back moth and silver Y moth) that are pests of UK vegetable and salad crops. These are moths captured or seen in the countries below and reported on 'biodiversity monitoring' websites.

Obviously it is unwise to make direct comparisons between countries but it should be possible to see if large numbers build up.

UK Met Office wind map showing forecast wind direction and speed for next 5 days.

European wind forecast map

Sources of information:

UK - Atropos and (Twitter especially @MigrantMothUK) [* = same sighting recorded on both].

Norway - http://www.artsobservasjoner.no/

Sweden - http://www.artportalen.se/

Finland - https://laji.fi/

Belgium - https://waarnemingen.be/

Netherlands - https://waarneming.nl/

Table last updated: 31 October

Date	UK Atropos	UK Twitter	Belgium	Netherlands	Sweden	Norway
31 Oct	0	0	2	17	0	0
30 Oct	0	0	8	18	3	0
29 Oct	1	2	5	10	1	0
28 Oct	1	4	10	3	1	0
27 Oct	2	0	25	9	4	3
26 Oct	1	3	8	47	8	2
25 Oct	0	0	11	7	1	3
24 Oct	0	1	2	3	0	1
23 Oct	0	0	3	7	2	0
22 Oct	0	2	4	4	6	0
21 Oct	1	1	5	4	4	1
20 Oct	0	0	14	11	4	3
19 Oct	0	0	9	14	4	1
18 Oct	1	0	13	20	2	0
17 Oct	1	1	15	18	3	1
16 Oct	1	0	39	15	0	0
15 Oct	0	0	4	2	0	0
14 Oct	0	0	2	4	0	0
13 Oct	1	3	1	1	3	0
12 Oct	0	0	0	7	0	0
11 Oct	0	1	4	2	1	0
10 Oct	0	0	0	6	3	1
9 Oct	1	0	6	10	1	8
8 Oct	0	5	33	26	8	2
7 Oct	6	4	22	17	1	1
6 Oct	1	5	2	13	0	3
5 Oct	0	2	3	3	0	0
4 Oct	0	0	1	10	0	0
3 Oct	0	3	10	3	0	1
2 Oct	2	0	2	10	1	1
1 Oct	0	0	2	5	4	1
30 Sep	0	1	0	3	2	0
29 Sep	0	0	0	2	1	0
28 Sep	0	0	0	1	2	0
27 Sep	0	0	0	1	2	0
26 Sep	0	0	6	12	1	1
25 Sep	6	0	7	9	1	4
24 Sep	2	1	5	8	2	3
23 Sep	5	0	22	20	2	1
22 Sep	12	10	31	25	0	0
21 Sep	21	8	24	35	1	0
20 Sep	0	0	10	54	1	0
19 Sep	0	6	19	19	1	1
18 Sep	0	0	5	17	1	1
17 Sep	0	0	3	6	3	0
16 Sep	0	0	2	14	4	1
15 Sep	0	1	1	7	4	0
14 Sep	0	0	2	2	8	0
13 Sep	0	0	1	8	1	0
12 Sep	0	0	0	4	4	2
11 Sep	0	0	1	2	6	3
10 Sep	0	0	6	11	5	4
9 Sep	0	6	9	4	22	14
8 Sep	6	16	209	33	32	6
7 Sep	6	16	7	49	13	15
6 Sep	2	6	24	52	13	29
5 Sep	0	1	35	37	24	11
4 Sep	0	0	23	17	15	11
3 Sep	0	0	63	34	8	17
2 Sep	1	2	72	20	1	1
1 Sep	0	0	37	25	1	1
31 Aug	0	0	35	14	0	0
30 Aug	0	0	93	23	17	9
29 Aug	0	0	106	77	5	8
28 Aug	0	1	42	96	2	13
27 Aug	0	0	23	39	3	0
26 Aug	0	0	8	18	1	1
25 Aug	0	0	3	14	7	2
24 Aug	0	0	13	10	1	1
23 Aug	0	1	15	31	3	2
22 Aug	0	0	10	7	0	1
21 Aug	0	0	4	15	4	0
20 Aug	0	0	11	19	4	3
19 Aug	0	1	5	34	0	2
18 Aug	0	1	30	51	0	7
17 Aug	0	1	12	60	5	2
16 Aug	0	0	34	20	7	3
15 Aug	0	0	19	23	13	13
14 Aug	0	0	41	17	20	30
13 Aug	0	5	79	56	4	4
12 Aug	0	2	48	82	7	4
11 Aug	0	2	36	45	7	7
10 Aug	0	0	13	26	3	8
9 Aug	0	0	51	25	16	11
8 Aug	0	0	16	21	14	18
7 Aug	0	0	16	40	19	33
6 Aug	0	0	43	66	27	112
5 Aug	0	0	32	41	17	15
4 Aug	0	0	24	21	41	25
3 Aug	0	3	44	59	16	18
2 Aug	0	0	30	51	18	25
1 Aug	0	1	58	63	29	7
31 Jul	3	12	179	89	44	25
30 Jul	0	0	101	109	33	31
29 Jul	0	2	56	83	26	18
28 Jul	0	0	30	61	38	34
27 Jul	0	0	37	189	107	15
26 Jul	0	1	27	74	78	63
25 Jul	0	0	137	68	55	52
24 Jul	0	1	23	62	112	100
23 Jul	0	1	36	56	130	103
22 Jul	0	1	34	119	115	98
21 Jul	0	0	46	182	119	65
20 Jul	0	0	123	428	125	52
19 Jul	0	75	115	811	73	29
18 Jul	0	5	84	546	48	77
17 Jul	0	34	19	406	80	73
16 Jul	0	0	29	74	49	107
15 Jul	0	2	66	169	60	139
14 Jul	0	2	25	437	9	105
13 Jul	0	7	20	147	71	28
12 Jul	0	0	15	55	122	115
11 Jul	0	0	53	53	1219	25
10 Jul	0	1	15	33	94	13
9 Jul	0	0	44	50	52	5
8 Jul	0	1	18	36	17	12
7 Jul	0	0	5	16	24	4
6 Jul	0	0	59	36	4	5
5 Jul	0	0	20	41	21	7
4 Jul	0	0	7	18	51	14
3 Jul	0	0	45	22	110	22
2 Jul	0	0	26	23	65	24
1 Jul	0	0	18	54	26	12
30 Jun	0	0	66	65	76	39
29 Jun	0	5	48	100	88	17
28 Jun	0	0	165	112	119	82
27 Jun	0	0	253	254	159	555
26 Jun	0	0	115	159	42	104
25 Jun	0	0	51	46	29	28
24 Jun	0	0	30	36	30	21
23 Jun	0	0	32	51	25	122
22 Jun	0	1	28	12	12	30
21 Jun	0	0	36	26	20	30
20 Jun	0	0	28	14	17	35
19 Jun	0	0	6	12	11	37
18 Jun	0	0	28	24	64	42
17 Jun	0	0	16	24	6	55
16 Jun	0	0	7	17	9	64
15 Jun	0	0	7	10	11	53
14 Jun	0	0	25	52	11	25
13 Jun	0	0	20	19	7	45
12 Jun	0	0	15	97	14	20
11 Jun	0	0	9	6	13	49
10 Jun	0	0	8	18	2	8
9 Jun	0	0	54	16	5	23
8 Jun	0	0	41	62	5	11
7 Jun	0	0	24	136	2	3
6 Jun	0	0	52	44	14	9
5 Jun	0	0	75	40	18	13
4 Jun	0	0	102	248	25	64
3 Jun	0	1	86	363	38	301
2 Jun	0	0	157	238	82	196
1 Jun	0	0	33	248	112	355
31 May	0	1	11	51	103	226
30 May	0	0	11	46	75	101
29 May	0	0	16	22	144	56
28 May	0	0	4	27	110	174
27 May	0	2	19	99	81	206
26 May	0	0	88	100	515	788
25 May	0	0	42	235	2353	321
24 May	0	0	29	68	160	190
23 May	0	0	38	75	30	17
22 May	0	11	33	82	10	32
21 May	0	0	109	71	262	17
20 May	0	0	236	180	11	12
19 May	0	0	293	276	9	13
18 May	0	0	72	199	6	11
17 May	0	50+	25	67	4	12
16 May	0	50+	19	22	8	9
15 May	0	5	45	42	10	8
14 May	0	0	37	26	5	21
13 May	0	2	30	29	5	11
12 May	0	0	14	6	9	10
11 May	0	0	1	10	6	5
10 May	0	0	7	5	3	3
9 May	0	0	4	5	8	17
8 May	0	0	5	3	2	15
7 May	0	0	2	2	1	5
6 May	0	1	6	17	3	8
5 May	0	0	5	9	26	13
4 May	1	0	5	3	29	28
3 May	0	0	2	3	6	5
2 May	0	0	31	31	4	6
1 May	0	1	46	186	5	2
30 Apr	0	0	12	43	1	1
29 Apr	0	0	1	9	1	0
28 Apr	0	0	9	1	0	0
27 Apr	0	0	0	2	1	1
26 Apr	0	0	1	4	0	0
25 Apr	0	0	0	0	0	0
24 Apr	0	0	1	1	0	0
23 April	0	0	0	0	0	0
22 April	0	0	0	1	0	0
21 April	0	0	0	0	0	0
20 April	0	0	0	0	0	0
19 April	0	0	1	0	0	0
18 April	0	0	2	0	0	0
17 April	0	0	0	0	0	0
April so far	1 on 12th April 3 on 11th April		-	-	-	-

Disclaimer

While the University or Warwick seeks 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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