The Effect of Freezing Temperatures on Microdochium majus and M. nivale Seedling Blight of Winter Wheat
Table 2
Effect of exposure to freezing temperatures (a), timing and duration of freezing (b) and the timing of freezing*duration of freezing and freezing temperature*timing of freezing interactions (c) on final emergence (%) of seedlings from a winter wheat cv. Equinox seed lot naturally infected (88%) with Microdochium spp.
(a)
Exposure to freezing
Final emergence (%)
Yes
71
No
56
LSD ()
0.9
SEM
0.4
DF
79
CV (%)
17.8
Data are back transformed, statistical analysis performed on square root transformed data.
(b)
Timing of freezing
Final emergence (%)
Duration of freezing
Final emergence (%)
None
71
None
71
Pre-emergent
46
12 hours
64
Post-emergent
67
24 hours
48
LSD ()
1.0
1.0
SEM
0.4
0.4
DF
79
79
CV (%)
17.8
17.8
Data are back transformed, statistical analysis performed on square root transformed data.
(c)
Timing of freezing
Duration of freezing
Pre-emergent
Post-emergent
LSD
SED
DF
CV (%)
12 hours
65
60
0.9
0.4
79
17.8
24 hours
34
69
Freezing temperature
Pre-emergent
Post-emergent
0°C
52
62
0.9
0.4
79
17.8
−5°C
40
72
Final emergence of non-frozen seedlings 71%. Data are back transformed, statistical analysis performed on square root transformed data.
