Table 1 Independent variables by disease contingency for logistic regression analysis of durum wheat septoria tritici blotch in the highlands of Wollo

District

Dessie Zuria

15

0

15

0

Plant population

High

12

13

16

9

Jama

13

2

15

0

Low

14

1

15

0

Meket

7

8

8

7

Medium

28

7

31

4

Wadila

9

6

11

4

Planting date

August

13

2

14

1

Woreilu

10

5

13

2

Early July

13

6

14

5

Altitude

≤ 2700 masl

32

9

38

3

June

5

7

6

6

> 2700 masl

22

12

24

10

Late July

12

3

15

0

Variety

Abesha

3

3

6

0

Mid-July

11

3

13

1

Enat

6

0

6

0

Previous crop

Barley

8

0

8

0

Enzosh

5

2

6

1

Legume

18

2

19

1

Firno

1

6

2

5

Tef

7

2

8

1

Gojam

3

0

3

0

Wheat

21

17

27

11

Gundile

5

1

5

1

Weed population

High (> 61 weeds m²)

2

9

4

7

Key sindie

9

4

9

4

Low (< 40 weeds m²)

39

5

41

3

Laste

6

3

7

2

Medium (41–60 weeds m²)

17

7

17

3

Nesh

3

0

3

0

Soil type

Red

8

10

11

7

Nich jiru

9

1

10

0

Gray

12

7

14

5

Tikur jiru

4

1

5

0

Black

34

4

37

1

Growth stage

Early flower

14

3

16

1

Flower

1

0

1

0

Late milk

8

0

8

0

Milk

31

18

37

12