A COMPENDIUM OF TROPICAL PLANT DISEASES AND DISORDERS
MYROTHECIUM DISEASES
SYMPTOMS
Spots often form at wound sites
Fruiting bodies appear black with a white fringe on undersides (sporodochia)
Spots often merge and have wet margins
Myrothecium roridum attacks many tropical plants causing leaf spots generally and petiole rot on tissue-cultured plants like Spathiphyllum and Syngonium. Studies indicate that there is no host specificity, so an isolate from Aglaonema could cause disease on any other susceptible host such as Ficus.
Petiole rot occurs at the soil-line with the oldest petioles dying first
FAVORABLE CONDITIONS
Overhead irrigation or exposure to rainfall
Using infected plugs or cuttings
Tissue-cultured plants are especially sensitive
Shade houses covered with plastic (wintertime in south Florida)
Over-fertilizing plants
FICUS eLASTICA MYROTHECIUM
HIBISCUS MYROTHECIUM
AGLAONEMA MYROTHECIUM
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DIEFFENBACHIA MYROTHECIUM
FICUS MYROTHECIUM
MYROTHECIUM
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