Abstract

MARTINEZ-DE LA PARTE, Einar; RODRIGUEZNUNEZ, Yudisneidi; DUVERGEL VIAMONTE, Yumila  and  ESPINOSA REYES, Omar. Garlic rust caused by Puccinia allii DC. F. Rudolphi in Granma province, Cuba. Rev. Protección Veg. [online]. 2016, vol.31, n.2, pp. 140-143. ISSN 2224-4697.

In February 2016, rust symptoms were observed in two garlic fields in the Chicolongo locality belonging to Guisa municipality of Granma province, in the eastern region of Cuba. Symptoms consisted of necrotic leaf tissue with abundant small (1 to 3 mm long) lesions, some of them were oblong and powdery, covered by masses of yellow to orange urediniospores, surrounded by a chlorotic halo, and others were black, oval to elongate and non-erumpent. With the aim of identifying the rust causal agent, spores were scraped from dry leaves, mounted in cotton blue solution on glass slides and examined under an optic microscope. For each sample, 50 uredospores and teliospores were measured and a range of dimensions was determined. Urediniospores were globoid to ellipsoid, echinulate and measured 20 to 30 x 20 to 28 mm with a wall thickness of 1 to 2 mm. Telia were black, oval, amphigenous, non-erumpent with two-celled, brown and smooth-walled teliospores that measured 42 to 65 × 20 to 25 mm. Pedicels of teliospores were very pale, with a length of 3 to 15 mm and usually fractured. Based on morphological characterization, the phytopathogenic agent was identified as Puccinia allii. This is the first report of P. allii causing onion rust in the eastern region of Cuba, specifically in Granma province.

Keywords : Allium; Cuba; Puccinia porri; Uredinales.

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