The Orchid Doctor Articles under the Heading Phytophthora

Phytophthora Comments
PHYTOPHTHORA: Black Rot Controls recommended: Captan at 1 ttpg.; Dexon at 1.5 ttpg. used as a spray or drench, where the whole plant is immersed. P71(2)-24; controls: Truban, Banrot, Physan 20. A80-356 0
PHYTORHTHORA: Black Rot It may also be caused by Pythium ultimum most destructive on cattleya types; high humidity favors it, so water into the pot and not on the leaves; control it with Truban drench at Hpg. AH86-72 0

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