Skip to main content

Table 5 Analysis of deviance, natural logarithms of odds ratio, and standard error of added variables in a reduced model analyzing septoria tritici blotch severity

From: Epidemiological factors of septoria tritici blotch (Zymoseptoria tritici) in durum wheat (Triticum turgidum) in the highlands of Wollo, Ethiopia

Added variable

Residual deviance

df

Deviance reduction

Pr > χ2

Variable class

Estimate loge (odds ratio)

SE

Odds ratio

Intercept

1378.9

    

− 3.42

0.54

0.03

District

1022.9

4

356.02

< 0.0001

Jama

0.45

0.50

1.56

Wadila

0.69

0.19

0.50

Woreilu

1.19

0.38

3.30

Dessie Zuria

− 1.64

0.50

0.19

Meket

0.00

0.00

1

Altitude

1016.81

1

6.10

0.0135

≤ 2700 masl

− 0.30

0.16

0.74

> 2700 masl

0.00

0.00

1

Variety

644.66

10

372.15

< .0001

Abesha

0.85

0.50

2.33

Enat

0.55

0.70

1.73

Enzosh

2.58

0.50

13.14

Firno

2.57

0.56

13.10

Gojam

− 1.27

0.83

0.28

Gundile

0.40

0.45

1.50

Key

1.32

0.50

3.75

Laste

0.98

0.41

2.67

Nech

1.37

0.88

3.95

Nech jiru

0.00

0.27

1.00

Tikur jiru

0.00

0.00

1

Growth stage

628.48

3

16.18

0.001

Early flowering

− 0.30

0.21

0.74

Flower

0.69

0.51

1.99

Late milk

0.86

0.42

2.37

Milk

0.00

0.00

1.00

Plant population

463.07

2

165.41

< .0001

High (> 210 plants m2)

0.32

0.16

1.38

Low (< 140 plants m2)

− 0.80

0.23

0.45

Medium (141–210)

0.00

0.00

1.00

Planting date

447.58

4

15.49

0.0038

August

0.13

0.21

1.14

Early July

− 0.29

0.21

0.75

June

0.81

0.23

2.24

Late July

− 0.64

0.26

0.53

Mid-July

0.00

0.00

1.00

Previous crop

266.30

3

181.28

< .0001

Barley

− 3.07

0.34

0.05

Legume

− 1.55

0.20

0.21

Tef

− 0.82

0.23

0.44

Wheat

0.00

0.00

1.00

Weed population

234.24

2

32.06

< .0001

High (> 61 weeds m2)

0.50

0.17

1.65

Low (< 40 weeds m−2)

0.91

0.18

2.48

Medium (41–60 weeds m−2)

0.00

0.00

1.00

Soil type

222.7967

2

11.45

0.0033

Red

0.30

0.24

1.34

Gray

0.52

0.17

1.69

Black

0.00

0.00

1.00

  1. df degrees of freedom, Pr probability of a χ2 value exceeding the deviance reduction, SE standard error