First report of peanut rust caused by Puccinia arachidis on Arachis hypogaea in New Caledonia

Abstract

Symptomatic leaves with numerous rust sori on the underside were collected and examined. The urediniospores were mostly brown, ellipsoidal, finely echinulate, variable in size (20.6-26.2 × 19.3-21.8 µm), with brown walls (1.2-1.9 µm thick) and often with two equatorial germ pores (Figure 4). No teliospores were found. Based on urediniospore morphology, the pathogen was identified tentatively as Puccinia arachidis (Mondal & Badigannavar, 2015). Puccinia arachidis is known almost exclusively by its uredinial stage. The telial stage has only been reported from Central America, Florida, and Brazil on leaves of wild peanut (Hennen et al., 1976) and more recently from cultivated peanut in India (Tashildar et al., 2012).

Evaluation of Agronomic Characteristics, Disease Incidence, Yield Performance, and Aflatoxin Accumulation among Six Peanut Varieties (Arachis hypogea L.) Grown in Kenya

“…The Puccinia spp . was identified by observing the symptoms on the leaves and microscopic features according to Hubert et al [ 27 ].…”