Monitoring aphids on carrot at Wellesbourne

Monitoring aphids on carrot at Wellesbourne 2020-22

Researchers at 糖心TV Crop Centre have been following the development of overwintering aphid populations on 鈥榦pen鈥� overwintered carrots over the last few years and the table below shows their counts since December 2020. Counts on the current year's new carrots are also added.

2020-21	Winged per plant	Wingless per plant	Parasitised per plant	2021-22	Winged per plant	Wingless per plant	Parasitised per plant
1 Dec 2020	0	0.78	0	5 Jan 2022	0.02	1.10	0
15 Dec 2020	0	0.53	0	24 Jan 2022	0	2.03	0
5 Jan 2021	0	0.21	0	15 Feb 2022	0	1.78	0
19 Jan 2021	0.01	0.63	0	8 Mar 2022	0	1.89	0
3 Feb 2021	0	0.29	0	23 Mar 2022	0.03	30.78	0
16 Feb 2021	0	0.33	0	7 Apr 2022	0.50	57.27	0
3 Mar 2021	0	0.32	0	21 Apr 2022	4.83	96.67	0
17 Mar 2021	0	2.71	0
31 Mar 2021	0	25.35	0
14 Apr 2021	0	15.24	0
27 Apr 2021	0.64	94.47	0.04
10 May 2021	1.02	112.7	0
24 May 2021	1.59	121.0	0.1
25 May 2021 (new carrots)	0.21	0.25	0
1 Jun 2021 (new carrots)	0.35	3.37	0
8 Jun 2021 (old carrots)	0.12	21.5	0
8 Jun 2021 (new carrots)	0.83	14.3	0
15 Jun 2021 (new carrots)	0.17	48.93	0.10
22 Jun 2021 (old carrots)	0	1.06	0
22 Jun 2021 (new carrots)	0	6.13	0.04
29 Jun 2021 (new carrots)	0	2.18	0.08
7 Jul 2021 (old carrots)	0	1.06	0
7 Jul 2021 (new carrots)	0	1.2	0.09
14 Jul 2021 (new carrots from now onwards)	0	0.18	0.04
20 Jul 2021	0	0.07	0.06
27 Jul 2021	0	0	0.02
16 Aug 2021	0	0.03	0.01
1 Sep 2021	0	0	0
28 Sep 2021	0	0.14	0
12 Oct 2021	0	0.24	0
26 Oct 2021	0.04	0.16	0
10 Nov 2021	0	1.2	0
23 Nov 2021	0	0.69	0
8 Dec 2021	0.02	0.27	0