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Hyphal extension of Pythium sp. after exposure to solar radiation through a range of WG Schott filters in experiment 3. Surface hyphal extension after 0 (•), 12 (▪), and 24 h (▴), and submerged hyphal extension after 24 h (◊). Values are means of four replicates ± standard error of the mean. Values with different letters at each time point are significantly different (P < 0.05).
