Estimation of Blast Severity on Rye and Triticale Spikes by Digital Image Analysis

Table 3

Statistical tests applied to the analysis of linear regression between the methods of assessing blast severity on rye and triticale spikes.

Evaluated relationship	Statistical test
	𝐹	𝑡	𝑅^2
SIS versus SCU	123.972**	11.135**	0.615**
SIS versus AUDPC	11.526**	3.395**	0.127^NS
SIS versus visual assessment at 11 dai	10.597**	3.255**	0.118^NS
SCU versus AUDPC	23.411**	4.839**	0.229*
SCU versus visual assessment at 11 dai	25.553**	5.055**	0.244*
AUDPC versus visual assessment at 11 dai	252.648**	15.895**	0.762**

Statistical tests: 𝐹: F-test; 𝑡: Student's t-test; 𝑅²: coefficient of determination.
Significance terms: NS: not significant; *P < 0.05; **P < 0.01.
SIS: selection of symptomatic areas by image segmentation method; SCU: selection of symptomatic areas with mouse cursor; AUDPC: area under the disease progress curve; dai: days after inoculation.