73 / 112
71
October 2016
LOCALITY
DISEASE AVERAGE %*
Cultivar
trials
Potchefstroom (4)
Alternaria
leaf spot
78,2a
Potchefstroom (1)
67,3b
Potchefstroom (3)
67,2b
Potchefstroom (5)
61,7bc
Delmas
58,7bc
Potchefstroom (2)
56,1cd
Bainsvlei
46,1d
Producers’
fields
Graslaagte
Alternaria
leaf spot
54,7a
Boschpoort
53,6a
Sannieshof
42,2ab
Dwaalboom
42,0ab
Makokskraal
40,0abc
Rietfontein
23,1bc
Rietpan
18,4c
Producers’
fields
Rietpan
White rust
53,3a
Boschpoort
41,6ab
Lichtenburg
39,6b
Makokskraal
20,0c
Producers’
fields
Naboomspruit
Stalk rot
95,6
Arlington
Brown rust
84,3
Delmas
Sclerotinia
head rot
31,1
TABLE 1: PERCENTAGE OF AVERAGE DISEASE SEVERITY AT
VARIOUS LOCALITIES SURVEYED DURING THE 2012/2013 SEASON.
*Values in a column per locality followed by the same letter are not significantly
different
LOCALITY
DISEASE AVERAGE %*
Cultivar
trials
Vredefort (1)
Alternaria
leaf spot
34,3bc
Vredefort (2)
36,0bc
Settlers
79,0a
Steinfast
24,3c
Carletonville
41,0bc
Rustenburg
52,3ab
Brits
58,3ab
Kroonstad
46,7c
Wesselsbron
24,7c
Lichtenburg
46,7bc
Producers'
fields
Potchefstroom (1)
Alternaria
leaf spot
79,2a
Wesselsbron
23,3d
Delmas
42,8c
Lichtenburg
61,8b
Potchefstroom (2)
28,5d
Potchefstroom (3)
27,3d
Producers'
fields
Klipfontein
Sclerotinia
head rot
17,7c
Lichtenburg (1)
20,0c
Viljoenskroon
37,3abc
Lichtenburg (2)
43,3abc
Lichtenburg (3)
40,0abc
Lichtenburg (4)
65,7a
Welgelegen
16,0c
Kroonstad (1)
44,3abc
Carletonville
23,3bc
Lichtenburg (5)
65,3a
Kroonstad (2)
43,3abc
Lichtenburg (6)
42,3abc
Lichtenburg (7)
53,3ab
Producers'
fields
Dwaalboom
Bacterial
brown rot
32,2
Arlington
Brown rust
75
Bloemfontein
Brown rust
13
Welgelegen
Brown rust
24,7
TABLE 2: PERCENTAGE OF AVERAGE DISEASE SEVERITY AT
VARIOUS LOCALITIES SURVEYED DURING THE 2013/2014 SEASON.
*Values in a column per locality followed by the same letter are not significantly
different
LOCALITY
DISEASE AVERAGE %*
Cultivar
trials
Delmas
Alternaria
leaf spot
55cd
Bainsvlei
38,08f
Senekal
45e
Bothaville
17,67g
Viljoenskroon
52,25d
Kroonstad
69,42b
Ottosdal
23g
Potchefstroom 1
39,5ef
Potchefstroom 2
39,58ef
Potchefstroom 3
55,58cd
Potchefstroom 4
59,75c
Potchefstroom 5
76,83a
Producers’
fields
Vlaklaagte
Alternaria
leaf spot
37,67d
Welgelegen
60a
Rustenburg 1
41,33cd
Rustenburg 2
45bcd
Rustenburg 3
37,67d
Lichtenburg
58,67a
Coligny
40cd
Vlakfontein
46,67bcd
Vlakpan
55,67ab
Ventersdorp
49,67abc
TABLE 3: PERCENTAGE OF AVERAGE DISEASE SEVERITY AT
VARIOUS LOCALITIES SURVEYED DURING THE 2014/2015 SEASON.
*Values in a column per locality followed by the same letter are not significantly
different
TABLE 4: PERCENTAGE AVERAGE DISEASE SEVERITY OF VARIOUS
CULTIVARS SURVEYED DURING THE 2013/2014 SEASON.
*Values in a column per locality followed by the same letter are not significantly
different
CULTIVAR
DISEASE
AVERAGE %*
Cultivar
trial
SYN 4045
Alternaria
leaf spot
47,1a
SYN 4200
35,8b
PHB 65A25
47,6a
PAN 7049
44,8a
Cultivar
trial
SYN 4045
Sclerotinia
head rot
19,4ab
SYN 4200
7,2b
PHB 65A25
14,9ab
PAN 7049
27,8a