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4-inch depth 90 Per Cent agar was poured Ananas comosus brown streaks cactorum cambium and phloem cambivora Isolate Castanea sp catawbiense causal organism cinnamomi Cinnamomum cold house cultures dendron disease of rhododendrons diseased plants Erica sp figures i0 flats foliage fungus grafted plants grafted stock greenhouse grower growing Growth of Rhododendron Growth-Temperature Curves hosts hybrid seedlings infection inoculum was placed invaded invasion Isolate from Rhododendron Isolate i7 isolates from pineapple Jersey leaf mold losses Mehrlich i3 Mixture mulch mycelium Oahu observed optimum overwintered outdoors pathogen peat moss perature Persea americana Phytophthora cinnamomi Pinus resinosa plants inoculated plants showed plots ponticum plants potato dextrose agar pots ranging from pH region rhodo rhododendron wilt root rot root system scion seed soil acidity soil moisture soil overwintered soil temperature species of Phytophthora stem sulfur sunken cankers susceptible symptoms thirty plants Three Isolates transplanting Tucker 27 typical Wilt and Root winter xylem