Invasive Species Compendium

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Abstract

Fusarium species isolated from cereals in Gorgan area.

Abstract

The identification and distribution of Fusarium spp. occurring on cereals (wheat, barley, rice and maize) was studied in the Gorgan area of Iran in 1994. Seventeen samplings (every 2 weeks) were taken during the cropping season. Using potato dextrose agar (PDA) and Nash & Snyder media, 169 Fusarium isolates were obtained. Using morphological characters and various keys for Fusarium species identification, all the isolates were identified as 1 of 20 Fusarium species (F. acuminatum [Gibberella acuminata] (1), F. avenaceum [G. avenacea] (2), F. chlamydosporum (3), F. compactum (4), F. culmorum (5), F. crookwellense (6), F. equiseti (7), F. graminearum [G. zeae] (8), F. lateritium [G. baccata] (9), F. longipes (10), F. moniliforme [G. fujikuroi] (11), F. nygamai (12), F. oxysporum (13), F. poae (14), F. proliferatum (15), F. sambucinum [G. pulicaris] (16), F. scirpi (17), F. semitectum [F. pallidoroseum] (18), F. solani (19) and F. sulphureum [G. cyanogena] (20)). The prevalence of Fusarium species in descending order was 18, 15, 8, 7, 9, 11, 19, 13 and 12 which accounted for 34, 31, 25, 18, 11, 10, 9, 7 and 7 isolates, respectively. The other species were comparatively less frequent. The species 4, 6, 10, 12, 14 and 17 are reported as new species to Iran. The occurrence of 20 on maize, 16 on wheat, 9 on maize and rice, 18 on barley and rice and 13 on wheat are new host records for Iran.