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Table 3 Severity of scab on pecan fruit by provenance in 2018 and 2019 at Byron, GA, USA

From: Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa

Provenance

Most scabbed

Overall

2018

2019

2018

2019

% severitya (rank)

95% CI

% severity (rank)

95% CI

% severity (rank)

95% CI

% severity (rank)

95% CI

IL-J

0.27 FGb (14)c

0.12–0.59

0.11 E (18)

0.05–0.24

0.19 E (13)

0.09–0.4

0.1 C (18)

0.05–0.22

KS-C

2.31 CDEF (9)

0.88–6.05

0.26 DE (11)

0.11–0.63

0.6 CDE (9)

0.25–1.47

0.19 C (11)

0.08–0.45

KS-K

0.85 DEFG (10)

0.32–2.24

0.2 DE (12)

0.08–0.51

0.31 DE (10)

0.13–0.78

0.14 C (13)

0.06–0.34

KY-W

0.24 FG (15)

0.09–0.66

0.15 DE (15)

0.06–0.39

0.16 E (15)

0.06–0.39

0.14 C (14)

0.06–0.33

MO-L

0.23 FG (16)

0.07–0.69

0.13 DE (16)

0.04–0.44

0.12 E (18)

0.04–0.33

0.1 C (17)

0.03–0.33

MO-V

0.59 DEFG (12)

0.23–1.49

0.17 DE (13)

0.07–0.43

0.19 E (14)

0.08–0.44

0.15 C (12)

0.06–0.36

MS-W

0.19 FG (17)

0.06–0.58

0.16 DE (14)

0.06–0.43

0.16 E (16)

0.06–0.43

0.11 C (15)

0.04–0.3

MX-C

19.27 ABC (5)

6.94–53.52

18.6 AB (6)

7.37–46.92

5.35 ABC (5)

2.07–13.82

8.5 AB (7)

3.46–20.84

MX-I

5.58 BCD (8)

2.45–12.69

6.19 BC (8)

2.94–13.04

2.4 BCD (8)

1.09–5.26

3.33 B (8)

1.59–6.97

MX-J

0.7 EFG (11)

0.31–1.54

0.86 D (10)

0.41–1.77

0.27 E (11)

0.12–0.57

0.44 C (9)

0.22–0.92

MX-O

22.98 ABC (4)

7.49–70.54

19.73 AB (5)

7.29–53.39

5.13 ABC (6)

1.88–13.95

8.53 AB (6)

3.34–21.77

MX-S

27.48 ABC (3)

9.46–79.78

29.36 AB (4)

10.97–78.56

8.89 AB (3)

3.43–23.06

13.96 AB (4)

5.54–35.19

TN-L

0.14 G (19)

0.06–0.35

0.12 DE (17)

0.05–0.29

0.11 E (19)

0.05–0.25

0.11 C (16)

0.05–0.24

TX-B

0.19 G (18)

0.08–0.43

0.1 E (19)

0.04–0.24

0.12 E (17)

0.05–0.26

0.1 C (19)

0.05–0.23

TX-G

0.5 EFG (13)

0.22–1.15

0.93 CD (9)

0.43–2.03

0.26 E (12)

0.12–0.58

0.36 C (10)

0.17–0.78

TX-K

49.1 AB (2)

20.49–117.66

49.65 A (1)

21.74–113.4

29.03 A (2)

12.84–65.65

33.95 A (1)

15.27–75.49

TX-T

70.34 A (1)

29.29–168.93

38.11 AB (2)

16.14–90

38.82 A (1)

17.14–87.94

22.43 AB (3)

9.83–51.17

TX-V

6.93 ABCDE (7)

1.64–29.34

32.85 AB (3)

7.42–145.41

5.05 ABCD (7)

1.45–17.63

27.27 AB (2)

6.99–106.4

TX-Z

16.63 ABC (6)

6.75–41

15.58 AB (7)

6.18–39.27

5.89 AB (4)

2.55–13.62

9.12 AB (5)

3.77–22.04

F value (P)

21.2 (< 0.0001)

 

28.4 (< 0.0001)

 

21.6 (< 0.0001)

 

26.8 (< 0.0001)

 
  1. In both years two scab severity estimates were taken, (1) a visual assessment of the most severely scabbed fruit, and (2) an overall assessment of the severity on fruit in the tree canopy. Estimates were based on a quantitative ordinal scale taking interval mid-points prior to analysis (Chiang et al. 2014)
  2. aThe % area diseased estimates were natural log transformed. Back transformed values are presented with means separation based on transformed values. The 95% CIs are back transformed values such that the upper confidence limit is EXP(LNmean + LNupperCI), and the lower confidence limit is EXP(LNmean − LNlower)
  3. bMeans separation was based on the Tukey-Kramer method (α = 0.05)
  4. cRank is the ranking order of magnitude from highest severity to lowest severity
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CABI Agriculture and Bioscience

ISSN: 2662-4044