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Table 1 Analysis of variance for the effect of mating type, isolate, population and fungicide concentrations on the pathogenicity and fungicide tolerance of Alternaria alternata as measured by lesion size at 5th days post inoculation on detached potato leaves and the relative growth rate (RGR) of the isolates in the presence of difenoconazole or mancozeb at three concentrations to the absence of the fungicides

From: Cross-resistance of the pathogenic fungus Alternaria alternata to fungicides with different modes of action

 

DF

SS

MS

F

Pr > F

Lesion area

 Mating type

1

23.19

23.19

7.61

0.006

 Population

6

124.54

20.76

6.81

< 0.0001

 Isolate (population)

223

2333.46

10.46

3.43

< 0.0001

 Error

606

1846.60

3.05

  

Mancozeb tolerance

 Mating type

1

0.001

0.001

0.11

0.74

 Population

6

0.64

0.11

9.13

< 0.001

 Isolate (population)

194

12.52

0.07

5.54

< 0.001

 Concentration

2

1.51

0.75

64.77

< 0.001

 Error

1366

15.03

0.01

  

Difenoconazole tolerance

 Mating type

1

2.52 × 10−5

2.52 × 10−5

0.00

0.96

 Population

6

0.53

0.09

8.07

< 0.0001

 Isolate (population)

187

5.97

0.03

2.94

< 0.0001

 Concentration

2

1.27

0.64

58.64

< 0.0001

 Error

1445

15.90

0.01

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