Phytophthora macrochlamydospora
stem rot of soybean
Phytophthora root rot of soyabean, Phytophthora root rot of soybean, Phytophthora wilt of soyabean, Phytophthora wilt of soybean, soyabean wilt disease, soybean wilt disease, stem rot of soybean
Oceania: Australia; South America: Brazil
Not known to occur
2025-12-23
fungus
Korea
Main: soybean
PHYTMA
Phytophthora macrochlamydospora is characterized by the production of large, thick-walled chlamydospores, which enable long-term survival in soil and plant debris. It is soilborne and associated primarily with root and collar rot–type diseases, causing root decay, reduced vigor, wilting, and plant decline under favorable conditions. Like other Phytophthora species, disease development is strongly linked to wet soils, poor drainage, and cool to moderate temperatures. Dispersal occurs mainly via infested soil, water, and infected plant material rather than through seed.
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