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Table 1 from:


Scherm, H., Savelle, A. T., Brannen, P. M., and Krewer, G. 2008. Occurrence and prevalence of foliar diseases on blueberry in Georgia. Online. Plant Health Progress doi:10.1094/PHP-2008-0421-01-RS.



Table 1. Severity, defoliation, and prevalence of foliar diseases on samples of rabbiteye and southern highbush blueberry cultivars, based on a disease survey in Georgia in summer and fall of 2002 and 2003.

Year and
cultivar
Typew nx Necrotic
leaf area
(%)y
Defol-
iation

(%)y
Disease prevalence (%)z
Septoria Gloeo-
sporium
Pesta-
lotia
Leaf
rust
Phyllo-
sticta
Algal
leaf
spot
Powdery
mildew
2002
Brightwell RE 15 7.1

(0.5-25.0)

18.4

(1.2-52.0)

73.3 40.0 20.0 6.7 6.7 0 0
Climax RE 18 4.7

(0.5-32.6)

6.6

(0-25.4)

22.2 22.2 33.3 11.1 33.3 0 0
Powder-
blue
RE 10 2.3

(0.5-5.0)

8.7

(1.6-20.8)

40.0 50.0 20.0 10.0 10.0 0 0
Premier RE 10 16.8

(1.8-25.0)

16.7

(1.6-26.3)

40.0 20.0 20.0 0 0 0 0
Tifblue RE 16 7.1

(1.0-30.0)

12.4

(0-34.7)

37.5 31.3 18.8 0 25.0 0 0
O’Neal SH 4 7.5

(0.5-20.0)

1.8

(0-4.5)

0 25.0 75.0 0 0 0 0
Star SH 5 18.5

(4.0-25.0)

13.2

(5.2-23.5)

100 20.0 60.0 0 0 0 0
2003
Brightwell RE 16 15.0

(1.0-67.9)

25.8

(1.9-70.8)

62.5 56.3 18.8 6.3 12.5 25.0 12.5
Climax RE 20 30.7

(0.5-88.9)

30.6

(4.3-95.4)

25.0 50.0 10.0 60.0 25.0 10.0 5.0
Powder-
blue
RE 10 10.6

(3.0-25.0)

23.3

(1.8-54.3)

50.0 40.0 20.0 20.0 10.0 20.0 0
Premier RE 14 13.9

(2.5-35.7)

28.1

(12.6-53.9)

42.9 64.3 35.7 7.1 21.4 7.1 0
Tifblue RE 19 20.5

(3.3-51.3)

24.7

(5.0-56.1)

57.9 31.6 5.3 0 26.3 10.5 5.3
Bluecrisp SH 8 14.7

(0.5-40.3)

18.7

(2.0-39.3)

62.5 37.5 62.5 50.0 37.5 0 0
Star SH 12 17.4

(0.5-53.8)

17.5

(1.2-41.1)

75.0 58.3 75.0 16.7 0 8.3 0

 w RE = rabbiteye, SH = southern highbush.

 x Number of samples.

 y Values are means and ranges (in parentheses).

 z Based on presence or absence of a particular disease on at least 5% of the leaves in a given sample.




© 2008 Plant Management Network.