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

Table 5 Correlation analysis (r and P values indicated) comparing pecan scab severity^a in provenances and families in provenances among years and assessment methods

Provenance/family	Scale and year	MP 1998	MP 2013	MP 2014	MS Leaf 2018	MS Leaf 2019	OS Leaf 2018	OS Leaf 2019	MS Fruit 2018	MS Fruit 2019	OS Fruit 2018	OS Fruit 2019
Provenance	Scale 1998	0.954	0.891	0.923	0.807	0.760	0.784	0.789	0.795	0.804	0.754	0.823
	Scale 1998	< 0.0001	< 0.0001	< 0.0001	< 0.0001	0.0002	< 0.0001	< 0.0001	< 0.0001	< 0.0001	0.0002	< 0.0001
	MP 1998		0.823	0.749	0.890	0.833	0.788	0.718	0.954	0.944	0.947	0.958
	MP 1998		< 0.0001	0.0001	< 0.0001	< 0.0001	< 0.0001	0.0005	< 0.0001	< 0.0001	< 0.0001	< 0.0001
	MP 2013			0.955	0.855	0.878	0.854	0.812	0.794	0.807	0.837	0.836
	MP 2013			< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001
	MP 2014				0.816	0.887	0.861	0.924	0.722	0.792	0.774	0.815
	MP 2014				< 0.0001	< 0.0001	< 0.0001	< 0.0001	0.0005	< 0.0001	< 0.0001	< 0.0001
Family in provenance	Scale 1998	0.953	0.827	0.896	0.775	0.758	0.824	0.804	0.711	0.685	0.813	0.827
	Scale 1998	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001
	MP 1998		0.767	0.614	0.685	0.596	0.777	0.589	0.789	0.712	0.817	0.823
	MP 1998		< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001
	MP 2013			0.821	0.624	0.653	0.775	0.630	0.623	0.548	0.641	0.680
	MP 2013			< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001
	MP 2014				0.580	0.530	0.766	0.769	0.494	0.504	0.604	0.645
	MP 2014				< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001

All analyses are based on Pearson’s correlation analysis, except those including the scale data from 1998 that are based on Spearman’s rank correlation analysis
^aScale = in 1998 tree score based on a 1–5 ordinal scale (Hunter and Roberts 1978); and in 2013 and 2014 using a percentage scale: MP = mean percent based on a sample of 10 leaves (Bock et al. 2016a), and using mid-point means based on a modified ordinal scale (Chiang et al. 2014) MS = Most severe based on severity estimate of the most scabbed leaf or fruit; OS = Overall severity based on an assessment of the overall disease on all leaves or fruit in the canopy

ISSN: 2662-4044