Ontario Phytophthora Tolerance Test 2025: Woodslee, Ontario

This Report Contains Published Registered Varieties Only.

Planting Date: May 25, 2025

Stand Count Dates:

HUZ	Date
2200 & 2400	August 18, 2025
2600	September 8, 2025
2800	September 8, 2025
3100 & 3400	September 26, 2025

Plot Size: Single row, 50 seeds/row

Replications: 4, randomized blocks

Phytophthora root rot testing is carried out on clay soils infested with common races of Phytophthora at Woodslee. Phytophthora Root Rot (PRR) ratings were changed starting in 2019. Previous methodology used counting plants shortly after emergence (3-4 weeks after planting) and a subsequent counting 4 weeks later. The loss was estimated based on the difference between count 2 and count 1, taken as a percentage. The limitation in this counting method is that it does not take into account pre-emergence mortality due to PRR nor does it take into account late season mortality. Starting in 2019 we began expressing the PRR ratings based on final stand in a High phytophthora pressure environment. This final stand was only rated once for all maturity groups and this was again changed to rate the plants near the R6 growth stage which was done in 2020 in order to capture late season PRR damage.

2025 Phytophthora Tolerance Test MG00E & MG00 (2200/2400)

Entry	Name		Final Stand/50 Plants	% Stand	% Loss
1	Hana		32	65	36
2	Liska		24	47	53
3	Koa		35	70	30
4	Prostar		37	75	25
5	Luxor		35	71	30
9	Bourke R2X		35	69	31
10	DKB002-32		33	67	34
11	Kudo R2X		26	53	48
12	Elmo E3		29	59	42
13	S007-Z1X		25	50	50
14	DKB006-80		31	62	39
15	Merino R2X		36	72	29
16	S003-R5X		31	62	38
17	PS 0011 XRN		26	52	49
18	Hart R2X		29	57	43
19	Young R2X		33	66	35
20	S007-A2XS		38	76	24
21	S0009-J5X		28	55	45
22	DKB007-91XF		26	53	48
23	DKB004-04		27	53	47
24	Alouette R2X		30	60	40
25	P003Z08E		34	69	31
26	P004Z87E		40	79	21
29	Wheeler R2X		30	61	40
30	Ehlers R2X		20	40	60
31	S003-B8XF		23	46	54
32	S005-Z5XF		39	79	22
33	S007-C2E3		31	61	39
34	Aurelina		36	71	29
35	Atiron		35	70	30
36	ABACA		37	75	26
37	Bellistar		24	48	53
38	S01-D5		35	69	31
39	BRILIO		28	56	44
40	NA0200		37	74	26
42	Jador		36	72	29
47	PS 0098 XR		30	59	41
48	Donaldo R2X		26	52	49
49	Rico R2X		38	77	23
50	DKB03-25		22	45	56
51	Bronco R2X		40	80	20
52	S04-J6X		29	59	42
53	S02-M4XF		26	51	49
54	B036CE		43	87	14
55	S03-V5E3		38	75	25
56	P007A68E		32	63	37
57	B0073EE		35	69	31
58	Stine 05EG62		22	44	56
59	DKB009-96		34	67	33
60	SI 00924XFN		34	68	32
61	Joly XF		40	80	20
62	Cullen XF		32	65	35
63	P006Z63E		32	64	36
65	Stine 04EJ02		34	68	32
67	S04-Q9XF		34	69	31
70	Conrad	check – high field tolerance, rps	19	37	63
71	Haro(1-7)1	check – minimal field tolerance, rps	6	13	88
72	OX20-8	check – no field tolerance, Rps 1a	0	1	100
73	Sloan	check – low field tolerance, rps	14	27	73
74	Williams	check – moderate field tolerance, rps	28	55	45
		Mean of entries	31
		Coefficient of variation (%)	32

2025 Phytophthora Tolerance Test MG0 (2600)

Entry	Name		Final Stand	% Stand	% Loss
1	S07-M8		34	68	32
2	OAC Strive		36	73	28
3	Havane		41	82	19
4	Marula		33	65	35
5	Panorama		30	59	41
6	S10-R2		36	73	27
7	AAC Shinju		27	54	46
8	Ezra		31	63	38
9	Dundee		33	65	35
10	OAC Kamran		30	61	39
11	AAC Kovik		36	72	28
12	S04-K9		38	76	24
14	Navan		40	80	21
15	Atacama		32	64	36
16	NA0800		41	82	18
17	Hola		38	76	24
18	Aya		39	79	21
20	Verdo		33	67	33
21	Atanga		35	71	30
25	Roxton		32	63	37
26	Algebra		37	75	26
27	Canstar		36	73	28
39	S06-G9		34	68	32
40	SFL 06-44 IP		36	71	29
56	Paisley		37	74	27
79	PS 0779 XRN		35	69	31
80	Beliveau R2X		35	69	31
81	DKB11-84		40	79	21
82	Nano R2X		38	76	24
83	S12-M5X		37	74	26
84	SI 0620XTN		29	58	42
85	Amino R2X		35	69	31
86	Enduro E3		38	75	25
87	SI 0921XTN		35	70	31
88	Harvey E3		28	57	44
89	Seabrook R2X		34	69	31
90	Orr R2X		34	67	33
91	Axis E3		29	59	41
92	Landmark E3		32	64	36
93	PS 0944 XRN		36	72	28
94	DKB08-80		35	70	31
95	PS 0521 XRN		29	57	43
96	P04A98E		34	68	32
97	P06A38E		37	73	27
98	B074HE		23	46	54
99	S06-A3XF		37	74	26
100	S09-B5XF		37	75	26
101	PS 0423EN		35	71	30
102	S11-A4E3		40	80	21
103	S11-U2XF		40	79	21
104	B103EE		30	60	40
105	Stine 10EG20		38	77	24
106	Stine 12EB32		35	71	29
107	Ridley XF		32	63	37
108	B054EE		38	76	24
109	P01Z13E		34	67	33
110	P05Z60E		34	67	33
111	P06Z90E		31	61	39
112	P09Z79E		40	80	20
113	P11Z72E		35	69	31
114	Tango R2X		36	72	29
116	DKB11-11XF		39	79	22
117	CP0324X		36	73	28
118	Crosby XF		32	63	37
119	Myers E3		36	73	28
121	Stine 09EJ12		21	42	58
122	Stine 10EH02		36	73	27
125	S06-A1E3		35	71	30
126	S07-T8XF		33	66	35
127	S08-Z4E3		35	71	30
128	S10-H1XF		37	73	27
130	SI 0225E3		36	72	28
131	CP0723E		34	68	33
132	SI 0525XTN		32	63	37
133	SI 0825E3N		44	89	12
136	Conrad	check – high field tolerance, rps	18	37	64
137	Haro(1-7)1	check – minimal field tolerance, rps	11	22	79
138	OX20-8	check – no field tolerance, Rps 1a	1	2	99
139	Sloan	check – low field tolerance, rps	9	17	83
140	Williams	check – moderate field tolerance, rps	29	58	42
		Mean of entries	34
		Coefficient of variation (%)	24

2025 Phytophthora Tolerance Test MG1 (2800)

Entry	Name		Final Stand	% Stand	% Loss
1	Acora	30459	33	66	34
2	HDC Blake	30516	30	60	40
4	Kyoto	30857	24	49	52
6	S14-H3	31469	26	53	48
8	P11A10	32105	36	72	28
10	OAC Aberdeen	32270	38	77	24
12	Atena	32302	35	71	30
14	Matilda	32306	36	72	29
15	Finch	32309	33	66	34
16	Odessa	32311	34	68	33
17	Kagawa	32333	29	58	43
18	OAC Union	32361	32	65	36
19	S12-J7	32381	34	68	33
21	Rowan	32640	33	67	34
22	Baltazar	32646	36	71	29
23	Forto	32663	41	82	19
24	Taku	32664	41	82	18
25	Mya	32722	34	67	33
26	Zeta	32723	27	53	47
28	Inwood	32830	36	71	29
29	Alinova	32967	31	62	39
30	Wilma	32990	36	72	28
31	OAC Equilibrium	33011	31	62	38
32	Shedden	33044	39	79	21
35	S16-B8	33206	33	66	35
43	NA1500	33394	31	62	38
58	DKB14-65	32497	32	65	35
59	Enyo E3	32516	39	77	23
60	SI 1820XTN	32657	39	79	22
61	Pico R2X	32717	38	76	24
62	Keith XF	32838	38	76	24
63	Compass E3	32852	28	55	45
64	PS 1022 EN	32862	32	65	35
65	DKB14-97	32869	44	87	13
66	P17A87E	32921	40	81	20
67	B119KE	32930	28	56	44
68	B182ME	32932	40	80	21
69	SI 1222E3N	32968	31	62	38
70	SI 1422XTN	32970	17	34	67
71	Rask E3	32977	36	72	29
72	Dyno R2X	32984	34	68	33
73	Mercado XF	32986	41	82	18
74	S13-Y4XF	33000	37	74	27
75	B173EE	33144	39	79	22
76	P19A37E	33145	38	75	25
77	Kraft E3	33188	37	73	27
78	B144EE	33209	36	72	29
79	PS 1344 XFN	33229	29	57	43
80	PS 1224 EN	33233	36	72	29
81	Stine 14EE21	33240	35	70	30
82	P13Z28E	33245	35	70	30
83	P17Z39E	33246	37	74	26
84	P18Z01E	33247	37	73	27
85	PR24E2850	33274	37	73	27
86	S15-G9E3S	33317	41	83	18
88	Bedrock E3	33396	26	51	49
89	Canyon E3	33397	35	70	30
90	STine 13EH62	33405	36	72	28
91	Stine 18EJ23	33406	34	68	32
92	Lindros E3	33422	39	78	22
93	PS 1777 EN	33448	34	69	32
94	SI 1925E3N	33502	39	79	22
96	Conrad	check – high field tolerance, rps	18	37	64
97	Haro(1-7)1	check – minimal field tolerance, rps	3	7	93
98	OX20-8	check – no field tolerance, Rps 1a	0	1	100
99	Sloan	check – low field tolerance, rps	10	21	80
100	Williams	check – moderate field tolerance, rps	24	49	52
		Mean of entries	33
		Coefficient of variation (%)	30

2025 Phytophthora Tolerance Test MG2E & MG2L (3100/3400)

Entry	Name		Final Stand	% Stand	% Loss
1	OAC Marvel	30154	31	62	39
2	DF 155	30572	31	62	39
3	SG 2311	30595	38	76	25
4	Candor	30596	32	64	37
5	AAC 26-15	31104	33	67	34
6	OAC Bruton	31442	21	42	58
7	AAC Wigle	31995	20	40	60
8	AAC McRae	32194	31	63	38
9	Tillson	32318	37	73	27
10	NA2700	32505	35	71	30
11	Siena	32642	35	70	31
12	NA2000	32808	34	68	33
13	OAC Achieve	33016	32	63	37
21	NA2200	33395	41	83	18
25	Express R2X	31968	31	62	39
26	S20-L8X	32054	32	65	36
27	DKB19-80	32491	34	67	33
28	PS 2120 EN	32503	31	62	38
29	PS 2521 XFN	32681	38	75	25
30	DKB21-30XF	32689	34	68	32
31	PS 2322 XFN	32980	29	58	43
32	S18-F1E3S	33001	31	62	38
33	S22-A2E3	33002	31	63	38
34	PS 1923XFN	33059	35	70	31
35	Equator E3	33137	29	59	42
36	P22A67E	33148	28	55	45
37	B243EE	33149	28	57	44
38	P24A07E	33150	32	64	36
39	Stine 20EG02	33172	34	68	32
40	Stine 25EG20	33173	33	66	35
41	B214EE	33210	34	69	32
42	Stine 22EH29	33237	39	77	23
43	P21Z88E	33248	31	62	39
44	P23Z58E	33249	32	64	36
45	DKB26-86XF	33311	37	74	26
48	Roenick XF	33428	36	72	28
49	Haley XF	33429	37	75	26
50	Sittler E3	33430	30	59	41
51	PS 2325 EN	33449	33	65	35
52	S18-J4XF	33483	34	68	32
53	S22-D6XF	33484	37	74	27
54	S23-P1E3	33485	39	79	22
55	AAC Big Ben	31988	32	64	36
56	OAC Stedfast	32846	34	68	32
57	OAC Valor	33014	38	76	24
60	S29-R5X	32226	30	59	41
61	S26-E3	32536	35	71	30
62	P25A16E	32925	32	63	37
63	B289TE	32935	37	73	27
64	PS 2923EN	33060	35	70	30
65	DKB29-87XF	33136	35	69	31
66	B283EE	33152	25	51	50
67	P28Z30E	33251	37	74	27
68	P28Z89E	33252	32	64	36
69	P31Z32E	33253	33	66	35
70	P32Z91E	33254	33	66	34
71	DKB27-54XF	33312	37	74	27
72	S28-G7E3S	33486	31	62	38
73	Conrad	check – high field tolerance, rps	26	51	49
74	Haro(1-7)1	check – minimal field tolerance, rps	10	20	81
75	OX20-8	check – no field tolerance, Rps 1a	0	0	100
80	Sloan	check – low field tolerance, rps	7	15	86
81	Williams	check – moderate field tolerance, rps	28	56	44
		Mean of entries	33
		Coefficient of variation (%)	26