A COMPENDIUM OF TROPICAL PLANT DISEASES AND DISORDERS
Globisporangium and Phytopythium are new separate genera that previously were included in the genus Pythium. These water mold pathogens attack the roots and sometimes stems of many ornamental plants. They are among the most common root rot pathogens that spread easily by run-off, in an ebb and flood and in contaminated irrigation water and occasionally in potting media. They often escape notice completely causing roots to be badly rotted with no above ground signs of the infection. PYTHIUM, GLOBISPORANGIUM AND PHYTOPYTHIUM DISEASES
SYMPTOMS
Damping-off
Lower yellow leaves, stunting and wilting
Brown water-soaked roots and poor root growth
Roots disintegrate when handled
FAVORABLE CONDITIONS
Poorly draining potting medium and over-watering
Over-fertilization on some crops
Ebb and flood irrigation systems
PYTHIUM BLIGHT ON IMPATIENS
PYTHIUM ROOT AND CROWN ROT
PYTHIUM ROOT ROT ON GARDENIA
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IVY PYTHIUM
PYTHIUM ROOT ROT NG IMPATIENS
PYTHIUM ROOT ROT
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