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Introduction to Fungi, Third Edition

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Plate 2 Oomycota. (a) Salmon infected by Saprolegnia sp. (b) Damping-off of cress caused by Pythium sp. (c) Sudden death of a<br />

20 -year-old Pseudotsuga menziesii plantation caused by Pythium undulatum (¼Phy<strong>to</strong>phthora undulata) due <strong>to</strong> root rot following heavy<br />

summer rains. (d) Phy<strong>to</strong>phthora rootrotsymp<strong>to</strong>msofAbies procera. (e) Late blight symp<strong>to</strong>ms on pota<strong>to</strong> leaf caused by Phy<strong>to</strong>phthora<br />

infestans. (f) Pink rot of pota<strong>to</strong> tuber caused by Phy<strong>to</strong>phthora erythroseptica. Killed tissue shows a pink discoloration after cutting and<br />

exposure <strong>to</strong> air for 30 min. (g) Peronospora parasitica on wallflower (Cheiranthus cheiri) showing the dis<strong>to</strong>rted host shoot and<br />

downy appearance of sporulating regions. (h) Cauliflower leaf infected with Albugo candida, showing the typical white blister rust<br />

symp<strong>to</strong>ms caused by the eruption of sporangia through the epidermis.

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