Table 2.

Measurements of incidence and severity of leaf necrosis (recorded in 2018 and 2019) that were used to compare sycamore (Platanus occidentalis) wildtype and ‘Davis’ trees.

Year	P. occidentalis	Leaf necrosis
Year	P. occidentalis	Incidence (range %)^{^x}	Mean rAUDPC^{^y} of incidence^{^z}		P-value	Severity (range %)^{^x}	Mean rAUDPC^{^y} of severity^{^z}		P-value
2018	wildtype	22-54	15.19	a	0.99	3-17	1.99	a	0.047
2018	‘Davis’	16-93	15.14	a	0.99	2-8	1.24	b	0.047
2019	wildtype	16-100	16.14	B	< 0.001	20-32	0.41	A	0.44
2019	‘Davis’	38-81	38.81	A	< 0.001	6-44	0.5	A	0.44

↵x Range of disease incidence and severity values were recorded at the end of the trial in August of each year.
↵y rAUDPC = relative area under the disease progress curve. Columns represent the AUDPC values divided by the total number of days between the first and the last assessment.
↵z Columns not connected by the same letter are statistically different according to Tukey Honest Significant Difference test (a = 0.05).