Figure 1.
Frequency distribution of Percentage Leaf Area Covered by Lesions (PLACL) and Percentage Leaf Area Covered by Pycnidia (PLACP) in 141 isolates of Mycosphaerella graminicola evaluated on two Swiss wheat cultivars.
Both PLACL and PLACP were square root transformed and labelled using the mid-point values of the corresponding bins: A) PLACL on Toronit; B) PLACL on Greina: C) PLACP on Toronit; and D) PLACP on Greina.
Figure 2.
Frequency distribution of cyproconazole resistance in 141 isolates of Mycosphaerella graminicola.
Cyproconazole resistance was determined by calculating the relative colony size of an isolate grown on Petri plates with and without the fungicide. Data were natural logarithm transformed and labelled using the mid-point values of the corresponding bins.
Table 1.
LSD test for differences in cyproconazole resistance and virulence among the five Mycosphaerella graminicola populations sampled from Australia, Israel, Switzerland and USA.
Figure 3.
Correlations between cyproconazole resistance and two measures of virulence in 141 isolates of Mycosphaerella graminicola evaluated on two Swiss wheat cultivars.
Cyproconazole resistance was determined by calculating the relative colony size of an isolate grown on Petri plates with and without the fungicide: A) Percentage Leaf Area Covered by Pycnidia (PLACP) on Toronit; B) Percentage Leaf Area Covered by Pycnidia (PLACP) on Greina; C) Percentage Leaf Area Covered by Lesions (PLACL) on Toronit; and D) Percentage Leaf Area Covered by Lesions (PLACL) on Greina.
Figure 4.
Correlation between variation in cyproconazole resistance and variation in two measures of virulence for five populations of Mycosphaerella graminicola.
Cyproconazole resistance was determined by calculating the relative colony size of an isolate grown on Petri plates with and without the fungicide. Correlation was estimated at the population level: A) phenotypic variation in Percentage Leaf Area Covered by Pycnidia (PLACP); B) phenotypic variation in Percentage Leaf Area Covered by Lesions (PLACL); C) genetic variation in Percentage Leaf Area Covered by Pycnidia (PLACP); and D) genetic variation in Percentage Leaf Area Covered by Lesions (PLACL).
Figure 5.
Correlation between population mean in cyproconazole resistance and two measures of virulence in Mycosphaerella graminicola.
Cyproconazole resistance was determined by calculating the relative colony size of an isolate grown on Petri plates with and without the fungicide: A) Percentage Leaf Area Covered by Pycnidia (PLACP) on Toronit; B) Percentage Leaf Area Covered by Pycnidia (PLACP) on Greina; C) Percentage Leaf Area Covered by Lesions (PLACL) on Toronit; and D) Percentage Leaf Area Covered by Lesions (PLACL) on Greina.