Association of Chocolate Spot and Faba Bean Rust Epidemics with Climate Change Resilient Cultural Practices in Bale Highlands, Ethiopia
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 variable
DF
Chocolate spot incidence, LRT
Chocolate spot PSI, LRT
VEF
VEL
VEF
VEL
DR
DR
DR
DR
Districts
7
51.7
<0.0001
47.8
<0 .0001
67.3
<0.0001
31.2
<0.0001
Planting date
2
18.8
<0.0001
9.6
0.0080
30.3
<0.0001
32.7
<0.0001
Previous crop
2
43.5
<0.0001
31.0
<0 .0001
67.3
<0.0001
17.4
0.0002
Altitude
2
4.4
0.1100
22.8
<0.0001
4.7
0.9700
12.2
0.0023
Cropping system
1
21.9
<0.0001
21.9
<0.0001
6.9
0.0085
6.9
0.0085
Growth stage
2
2.2
0.3400
7.6
0.0220
3.3
0.1952
0.2
0.8900
Weed management
2
17.2
0.0001
12.9
0.0016
36.3
<0.0001
15.7
0.0004
Soil type
2
0.0
1.0000
26.4
<0.0001
2.7
0.2595
3.3
0.1889
Fertilizer
1
8.0
0.0050
0.0
1.0000
2.6
0.1055
2.0
0.1549
Fungicides
1
0.0
1.0000
0.1
0.8081
0.7
0.3987
0.3
0.6090
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.
