Table 7 Pearson’s correlation (R) between phenotyping variables at different dates and the fresh weight of the beet and final nematode population in the soil (n = 20, p < 0.1)

2014—susceptible

 935, 1446, 1485

Canopy temperature

–

–

 –

Cumulative canopy area

0.32

–

 1371

CHLG

0.80*

−0.79*

NDVI

0.59*

−0.76*

MCARI2

0.67*

−0.78*

2015—tolerant

 581, 599, 736, 856, 1347

Canopy temperature

–

–

 –

Cumulative canopy area

0.54*

–

 404

HI

0.40*

−0.60*

 460

780/700

0.37*

−0.71*

 599

CHLG

0.41*

−0.42*

PRI

0.32

−0.61*

 736

TGI

0.36

−0.51*

 978

HI

0.37*

–