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: 3 July

Date	UK Atropos	UK Twitter	Belgium	Netherlands	Sweden	Norway
3 Jul	0	0	17	12	93	9
2 Jul	0	0	25	14	64	21
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.

@warwickpestnews on X

Silver Y moth biology