Effects of Pythium Species and Time in Cold Storage on the Survival of Bareroot and Container-Grown Southern Pine Seedlings
Table 6
Mean container-grown loblolly, slash, and shortleaf pine survival and Pythiaceous colony-forming units (CFUs) for 4- 6- and 12-week stored (4-5°C) seedlings six months after outplanting in 2009.
Pine
Treatmentz
Survival (%)
Pythiaceous CFUs
4 wks
6 wks
12 wks
Total
4 wks
6 wks
12 wks
Total
Loblolly
Control, no wounding
82
72
5
53
0
0
0
0
P. dimorphum 200 g, no wounding
93
62
5
53
0
0
0
0
P. dimorphum 200 g, wounding
87
65
2
51
0
0
1.3
0.4
P. irregular 200 g, no wounding
88
82
10
60
0
0
0.6
0.2
P. irregulare 200 g, wounding
92
67
7
55
2.6
3.6
6.6
4.3
LSDy
(12)
(37)
(5)
(37)
(2.0)
(3.7)
(3.5)
(1.7)
Slash
Control, no wounding
72
72
5
50
0
0
0
0
P. dimorphum 200 g, no wounding
87
75
7
56
0
0.3
0
0.1
P. dimorphum 200 g, wounding
77
70
15
54
0
0
0
0
P. irregular 200 g, no wounding
85
78
5
56
2
3
3.3
2.8
P. irregulare 200 g, wounding
95
73
7
58
2.6
7.6
6.6
5.6
LSDy
(15)
(16)
(13)
(35)
(2.5)
(6.6)
(3.1)
(2.3)
Shortleaf
Control, no wounding
78
87
4
56
0
0
0
0
P. dimorphum 200 g, no wounding
78
82
2
50
2.3
1.6
2.3
2.1
P. dimorphum 200 g, wounding
89
58
2
50
3.3
2.6
3
8.9
P. irregulare200 g, no wounding
93
80
2
58
5.3
4.6
7.3
5.7
P. irregulare 200 g, wounding
82
58
9
50
6
8
4.6
6.2
LSDy
(24)
(35)
(12)
(38)
(4.2)
(5.0)
(2.0)
(2.0)
zPythium inoculation treatments took place on December 19, 2008.
yLeast significant difference .
