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Table 2 Severity of scab on pecan leaves 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 0.12 Fb (18)c 0.07–0.19 0.1 E (19) 0.07–0.15 0.11 C (16) 0.09–0.14 0.1 F (19) 0.09–0.12
KS-C 0.21 CDEF (10) 0.12–0.38 0.14 DE (9) 0.09–0.23 0.14 BC (9) 0.1–0.19 0.12 DEF (10) 0.1–0.14
KS-K 0.14 DEF (13) 0.08–0.25 0.11 E (14) 0.07–0.17 0.12 BC (14) 0.09–0.16 0.11 EF (14) 0.09–0.13
KY-W 0.13 DEF (15) 0.07–0.24 0.11 E (15) 0.07–0.17 0.12 BC (15) 0.09–0.16 0.11 EF (16) 0.09–0.13
MO-L 0.12 EF (17) 0.07–0.22 0.11 E (12) 0.07–0.18 0.11 BC (19) 0.08–0.15 0.11 DEF (11) 0.09–0.14
MO-V 0.13 EF (16) 0.07–0.22 0.11 E (13) 0.07–0.17 0.11 BC (18) 0.08–0.15 0.11 EF (13) 0.09–0.13
MS-W 0.17 DEF (11) 0.09–0.34 0.11 E (16) 0.06–0.18 0.12 BC (13) 0.09–0.17 0.11 EF (15) 0.09–0.13
MX-C 0.98 ABC (5) 0.52–1.86 0.42 BCD (7) 0.25–0.69 0.24 AB (5) 0.17–0.34 0.17 BCDE (6) 0.14–0.2
MX-I 0.49 CDE (7) 0.29–0.81 0.46 BC (6) 0.31–0.7 0.19 BC (7) 0.14–0.24 0.17 BCD (5) 0.15–0.2
MX-J 0.16 DEF (12) 0.1–0.27 0.12 E (11) 0.08–0.18 0.12 BC (11) 0.1–0.16 0.11 EF (12) 0.1–0.13
MX-O 0.68 BCD (6) 0.35–1.33 0.25 CDE (8) 0.15–0.42 0.21 ABC (6) 0.15–0.29 0.15 CDEF (8) 0.12–0.18
MX-S 0.22 CDEF (9) 0.11–0.45 0.53 ABC (5) 0.32–0.88 0.13 BC (10) 0.09–0.18 0.16 BCDEF (7) 0.13–0.2
TN-L 0.11 F (19) 0.07–0.2 0.1 E (17) 0.07–0.16 0.11 BC (17) 0.08–0.15 0.1 EF (18) 0.09–0.12
TX-B 0.14 EF (14) 0.08–0.23 0.1 E (18) 0.07–0.16 0.12 BC (12) 0.09–0.16 0.1 F (17) 0.09–0.12
TX-G 0.28 CDEF (8) 0.16–0.47 0.14 DE (10) 0.09–0.21 0.15 BC (8) 0.11–0.2 0.12 DEF (9) 0.1–0.14
TX-K 2.77 AB (2) 1.66–4.61 1.38 A (3) 0.92–2.07 0.41 A (2) 0.32–0.54 0.22 ABC (3) 0.19–0.26
TX-T 4.09 A (1) 2.47–6.77 1.4 A (2) 0.94–2.1 0.41 A (3) 0.31–0.53 0.25 AB (2) 0.21–0.29
TX-V 2.71 AB (3) 1.59–4.61 1.63 A (1) 1.07–2.48 0.42 A (1) 0.32–0.55 0.32 A (1) 0.27–0.37
TX-Z 2.13 AB (4) 1.25–3.62 0.86 AB (4) 0.57–1.3 0.4 A (4) 0.31–0.53 0.21 BC (4) 0.18–0.24
F value (P) 21.8 (< 0.0001)   23.3 (< 0.0001)   13.7 (< 0.0001)   18.3 (< 0.0001)  
  1. In both years two scab severity estimates were taken, (1) a visual assessment of the most severely scabbed leaf, and (2) an overall assessment of the severity on leaves 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