Rhizopus arrhizus

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Rhizopus arrhizus (= Rhizopus oryzae) - B+C) culture on APDA, D) fungus, K + L) symptoms of infected Brassica campestris ssp. chinensis plants (click on image to enlarge it)
Authors: Samaih Arif et al.
Source: Phytopathologia Mediterranea (2019), 58 p. 215

Rhizopus arrhizus Fischer 1892

The fungus causes rots on various crops and may also be a problem in stored vegetables. Common diseases are root rot and stem rot on vegetables or soft rot on fruits. It can be also a human pathogen.

The hyphae are rarely septate and the sporangiophores are usually straight, smooth-walled, sometimes branched and 200 to 1000 μm long. The sporangia are spherical, around 60 to 200 μm in diameter. The sporangiospores are striate, brown, and subglobose with a size of around 6 x 4 µm.

Rhizopus oryzae

Vernacular names
• English: sunflower head rot
head rot of sunflower
rhizopus rot of mulberry