Diversity of grain mold fungi on selected sorghum genotypes

Girish, A G and Rao, V P and Thakur, R P (2004) Diversity of grain mold fungi on selected sorghum genotypes. Indian Phytopathology, 57 (1). pp. 84-87. ISSN 0367-973X

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To determine the diversity in mould fungi on sorghum genotypes both under field and laboratory conditions, 14 genotypes including six inbreds, one released hybrid and seven cultivars of varying grain mould resistance were selected and grown in Andhra Pradesh, India, in 2001. Under field conditions, the overall grain mould severity varied from 1.9 (IS 23599) to 9.0 (Bulk Y and SPV 104). The mould complex consisted of Alternaria, Curvularia, Fusarium and Phoma species, of which, Curvularia lunata [Cochliobolus lunatus] appeared as the most severe (severity up to 7.5) and Fusarium as the least severe (severity up to 2.0). Genotypes IS 8545, IS 14332, IS 14384 and IS 23599 were highly resistant (mean severity≤2.0), and C43, Sepon/79-26 and AKMS 14 B were resistant (mean severity 2.8-3.9). All these exhibited late flowering (74-79 days to 50% flowering, DTFPF) except IS 8545 (58 DTFPF) compared to the highly susceptible genotypes Bulk Y 51 and SPV 104 (51 and 73 DTFPF, respectively). Under laboratory conditions, the overall mean grain infection ranged from 20% (IS 23599) to 97% (Swarna). A. alternata was the most predominant (>10% grain infection in 11 genotypes) and the least was Phoma sorghina on only 5 genotypes. IS 23599 and IS 14332 were resistant (≤10% infection) to all 6 fungi. Diversity in fungal species causing grain mould was detected in field and plating tests. In the visual examination, four fungal genera had varying severity. Among these, C. lunata was predominant. F. moniliforme [Gibberella fujikuroi] was better detected in the plating tests than in the field. Late maturing IS 23599, IS 14332, IS 14384 and C43 exhibited high resistance under favourable weather conditions in the field and plating tests

Item Type: Article
Subjects: Mandate crops > Sorghum
Depositing User: Library ICRISAT
Date Deposited: 13 Dec 2011 12:38
Last Modified: 13 Dec 2011 12:38
URI: http://oar.icrisat.org/id/eprint/4934
Official URL:
Acknowledgement: UNSPECIFIED
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