Fig. 24. Root health rating (*scale 0-4: 0=healthy, 1=1-25% root necrosis, 2=26-50% root necrosis, 3=51-75% root necrosis, 4=76-100% root necrosis). Bars with the same letter are not significantly different according to LSD (0.05). Necrotic roots were a result of infection with Pythium spp.

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