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Figure from:The effect of potato variety mixtures on epidemics of late blight in relation to plot size and level of resistance

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*SED for single varieties have 25 d-f., for the mean 115 df. Table 4 Analysis of the logistic disease progress rates for potato late blight on four varieties at three different plot sizes in 2002. There were significant differences between plot sizes for Robinta and Sante and for the mean of all the varieties

Table 4 *SED for single varieties have 25 d-f., for the mean 115 df. Table 4 Analysis of the logistic disease progress rates for potato late blight on four varieties at three different plot sizes in 2002. There were significant differences between plot sizes for Robinta and Sante and for the mean of all the varieties

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Table 1 The characteristics of varieties used was a split-plot design. Main plots had large (9 x 7.5 m) or small (4.5 x 4.5 m) subplots. Each subplot contained either a pure variety or an equiproportionate mixture o two to five varieties; a complete set of variety treatments were randomised within each main plot. For logistica reasons, only two replicates were possible. Details of the variety mixtures and agronomy used are given in Phil- lips (2004). Varieties were compatible agronomically and had a range of foliage resistance to late blight. Late blight arrived as a natural infection around 9 August 2001. Severity was assessed visually on 9, 15, 20, 24, 28 August and 1 September. dom mixture of the varieties Cara and Sante. Late blight arrived as a natural infection around 13 July 2002. Late blight was scored on the 13, 17, 23, 30 July and 5 August 2002. AUDPC and rate were analysed in each variety separately using a split-plot ANOVA procedure in Genstat.
Table 1 The characteristics of varieties used was a split-plot design. Main plots had large (9 x 7.5 m) or small (4.5 x 4.5 m) subplots. Each subplot contained either a pure variety or an equiproportionate mixture o two to five varieties; a complete set of variety treatments were randomised within each main plot. For logistica reasons, only two replicates were possible. Details of the variety mixtures and agronomy used are given in Phil- lips (2004). Varieties were compatible agronomically and had a range of foliage resistance to late blight. Late blight arrived as a natural infection around 9 August 2001. Severity was assessed visually on 9, 15, 20, 24, 28 August and 1 September. dom mixture of the varieties Cara and Sante. Late blight arrived as a natural infection around 13 July 2002. Late blight was scored on the 13, 17, 23, 30 July and 5 August 2002. AUDPC and rate were analysed in each variety separately using a split-plot ANOVA procedure in Genstat.
Figure 1 Disease epidemic curves for potato late blight on cvs. Robinta, Sante, Milva and Appell grown in single-variety plots of varying size in 2002 O, 9-m? plots; @, 34-m? plots; a, 63-m? plots.
Figure 1 Disease epidemic curves for potato late blight on cvs. Robinta, Sante, Milva and Appell grown in single-variety plots of varying size in 2002 O, 9-m? plots; @, 34-m? plots; a, 63-m? plots.
*Main effects of mixture and size only are shown; interactions were not significant. For comparisons between pure varieties or mixtures, SED 65, 64 df. “For comparisons between plot sizes, SED 99, 10 d.f. Table 2 Averages of area under disease progress curves (%-day) of late blight on each variety growing in pure stands and two-component mixtures in plots of two different sizes in 2001
*Main effects of mixture and size only are shown; interactions were not significant. For comparisons between pure varieties or mixtures, SED 65, 64 df. “For comparisons between plot sizes, SED 99, 10 d.f. Table 2 Averages of area under disease progress curves (%-day) of late blight on each variety growing in pure stands and two-component mixtures in plots of two different sizes in 2001
Figure 2 Potato late blight progress curves in 2002 on (A) Cara and (B) Sante in pure stands and mixtures with Sante or Cara at three planting densities.
Figure 2 Potato late blight progress curves in 2002 on (A) Cara and (B) Sante in pure stands and mixtures with Sante or Cara at three planting densities.
Table 3 Area under disease progress curves (%-day) of late blight or four varieties growing in pure stands of three different plot sizes in 2002 *All single-variety SED have 25 cf.
Table 3 Area under disease progress curves (%-day) of late blight or four varieties growing in pure stands of three different plot sizes in 2002 *All single-variety SED have 25 cf.
“Differences between mixture partners, 4,16 d.f., P < 0.01. Differences between mixture partners, 4,16 d.f., P < 0.05. Table 5 Mean area under the disease progress curve (%-day) of cvs. Cara and Sante in mixtures with other varieties
“Differences between mixture partners, 4,16 d.f., P < 0.01. Differences between mixture partners, 4,16 d.f., P < 0.05. Table 5 Mean area under the disease progress curve (%-day) of cvs. Cara and Sante in mixtures with other varieties