Soybean Rust Life Cycle, Spore Germination and Survival - Plant ...

Survival of Phakospora pachyrhizi in
USA
‣ Description: P. pachyrhizi is still known as an obligate parasite.
Urediniospores survive (in resting or dormant state) less than 2 days
under natural outdoor conditions. They do not survive in dried or
decayed tissues or in the soil (Ilag, 1977).
‣ Survival Information: When soybean plants are not present in the
field the fungus is viable only when transferred to another living host
(Ilag, 1977). One widespread host in the United States is kudzu,
Pueraria montana var. lobata, that could serve as a reservoir for
soybean rust. There are a variety of other leguminous crops or
weeds that have shown varying degrees of susceptibility to both
species of soybean rust.