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Ecological Processes

Table 4 Analysis of deviance, natural logarithms of odds ratio, and standard error of added variables in a reduced model analyzing septoria tritici blotch incidence

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 SE Odds ratio
Intercept 3752.19      − 0.73 0.37 0.48
District 3217.99 4 534.21 < .0001 Jama − 0.74 0.34 0.48
Wadila − 0.35 0.15 0.70
Woreilu − 0.39 0.31 0.68
Dessie Zuria − 1.92 0.31 0.15
Meket 0.00 0.00 1
Altitude 3089.44 1 128.55 < .0001 ≤ 2700 masl 0.61 0.12 1.85
> 2700 masl 0.00 0.00 1
Variety 2157.84 10 931.59 < .0001 Abesha 0.36 0.28 1.43
Enat 0.34 0.33 1.41
Enzosh 0.10 0.35 1.10
Firno 0.42 0.37 1.52
Gojam − 0.10 0.36 0.91
Gundile − 0.07 0.23 0.93
Key − 0.21 0.33 0.81
Laste 0.38 0.24 1.47
Nech − 1.12 0.46 0.33
Nech jiru − 0.32 0.13 0.73
Tikur jiru 0.00 0.00 1
Growth stage 2104.07 3 53.77 < .0001 Early flowering − 0.35 0.12 0.70
Flower − 0.20 0.31 0.82
Late milk 0.15 0.19 1.16
Milk 0.00 0.00 1
Plant population 1629.71 2 474.36 < .0001 High (> 210 plants m−2) 0.44 0.09 1.56
Low (< 140 plants m−2) − 0.93 0.12 0.39
Medium (141–210 m−2) 0.00 0.00 1
Planting date 1596.67 4 33.04 < .0001 August 0.41 0.13 1.50
Early July 0.02 0.12 1.02
June 0.77 0.15 2.16
Late July 0.13 0.14 1.14
Mid-July 0.00 0.00 1
Previous crop 1374.62 2 222.05 < .0001 Barley − 1.75 0.18 0.17
Legume − 1.18 0.12 0.31
Tef − 0.59 0.12 0.56
Wheat 0.00 0.00 1
Weed population 1360.73 2 13.88 0.001 High (> 61 weeds m−2) 0.58 0.14 1.79
Low (< 40 weeds m−2) 0.42 0.11 1.53
Medium (41–60 weeds m−2) 0.00 0.00 1
Soil type 1301.05 2 59.69 < .0001 Red 0.94 0.15 2.55
Gray 0.79 0.11 2.21
Black 0.00 0.00 1
  1. df degrees of freedom, Pr probability of a χ2 value exceeding the deviance reduction, SE standard error
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