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Soybean rust is a disease that affects soybeans and other legumes. It is caused by two types of fungi, Phakopsora pachyrhizi, commonly known as Asian soybean rust, and Phakopsora meibomiae, commonly known as New World soybean rust. P. meibomiae is the weaker pathogen of the two and generally does not cause widespread problems.
The Asian soybean rust is a polycyclic disease: within the disease cycle, the asexual urediniospores keep infecting the same plant. Teliospores (sexual spores) are the survival spores that overwinter in the soil. Basidiospores are the spores that are able to contaminate an alternative host. The urediniospores need a minimum of six hours to ...
Rust Phakopsora pachyrhizi. Scab Spaceloma glycines. Sclerotinia stem rot Sclerotinia sclerotiorum. Southern blight (damping-off and stem rot) = Sclerotium blight [1] Agroathelia rolfsii [teleomorph] Stem canker Diaporthe phaseolorum Diaporthe phaseolorum var. caulivora Phomopsis phaseoli [anamorph] Stemphylium leaf blight Stemphylium botryosum
Rust fungi grow intracellularly, and make spore-producing fruiting bodies within or, more often, on the surfaces of affected plant parts. [3] Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts.
(b) Vegetative cycle occurring on poplar leaves and used as a model for molecular investigations of the poplar-poplar rust interaction. hpi=hours of postinoculation. A heteroecious parasite is one that requires at least two hosts. The primary host is the host in which the parasite spends its adult life; the other is the secondary host. Both ...
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