Phakopsora pachyrhizi

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Phakopsora pachyrhizi is a fungal pathogen that causes soybean rust, a significant disease affecting soybean crops worldwide. This pathogen is a member of the Basidiomycota division and the Pucciniales order, which includes other rust fungi.

Taxonomy[edit | edit source]

The scientific name Phakopsora pachyrhizi is derived from the Greek words phakos (lens), sora (heap), and pachyrhizi (thick root), referring to the lens-shaped spore heaps and thick root-like structures characteristic of this species.

Life Cycle[edit | edit source]

The life cycle of Phakopsora pachyrhizi involves several stages, including the production of urediniospores, teliospores, basidiospores, and aeciospores. The fungus overwinters as urediniospores, which germinate in the spring to infect new host plants.

Disease Symptoms[edit | edit source]

Infection by Phakopsora pachyrhizi results in the characteristic symptoms of soybean rust, including the formation of small, reddish-brown lesions on the leaves, stems, and pods of the soybean plant. Severe infections can lead to significant yield losses.

Management[edit | edit source]

Management of Phakopsora pachyrhizi involves a combination of crop rotation, use of resistant soybean varieties, and application of fungicides. Early detection and monitoring of the disease are also critical for effective control.

Impact[edit | edit source]

Soybean rust caused by Phakopsora pachyrhizi is a major threat to soybean production worldwide. The disease can cause significant yield losses, impacting the economies of countries reliant on soybean production.

See Also[edit | edit source]


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Contributors: Prab R. Tumpati, MD