Table 4: Independent variables used in logistic regression modeling of chocolate spot incidence and percentage severity index (PSI) and likelihood ratio test (LRT) for ten variables entered first and last into a model.

Independent variableDFChocolate spot incidence, LRTChocolate spot PSI, LRT
VEF VEL VEF VEL
DRDRDRDR

Districts751.7<0.000147.8<0 .000167.3<0.000131.2<0.0001
Planting date218.8<0.00019.60.008030.3<0.000132.7<0.0001
Previous crop243.5<0.000131.0<0 .000167.3<0.000117.40.0002
Altitude24.40.110022.8<0.00014.70.970012.20.0023
Cropping system121.9<0.000121.9<0.00016.90.00856.90.0085
Growth stage22.20.34007.60.02203.30.19520.20.8900
Weed management217.20.000112.90.001636.3<0.000115.70.0004
Soil type20.01.000026.4<0.00012.70.25953.30.1889
Fertilizer18.00.00500.01.00002.60.10552.00.1549
Fungicides10.01.00000.10.80810.70.39870.30.6090

DF, degrees of freedom; LRT, likelihood ratio test; DR, deviance reduction; Pr, probability of χ2 value exceeding the deviance reduction; VEF, variable entered first into model; VEL, variable entered last into model.