DETERMINATION OF PHYSIOLOGICAL RACES OF TOMATO WILT AGENT IN MAJOR CULTIVATION AREAS IN IRAN

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AHMADVAND R.; ZARBAKHSH A.

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Journal: AGRICULTURAL RESEARCH Year:2008 | Volume:8 | Issue:1 (B) Page(s): 65-77

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Title

DETERMINATION OF PHYSIOLOGICAL RACES OF TOMATO WILT AGENT IN MAJOR CULTIVATION AREAS IN IRAN

Author(s)

AHMADVAND R. | ZARBAKHSH A. | Issue Writer Certificate

Keywords

TOMATOQ3

FUSARIUM WILTQ3

FUSARIUM OXYSPORUM F. SP.Q3

LYCOPERSICI AND PHYSIOLOGICAL RACESQ3

Abstract

The most common areas of TOMATO fields such as Varamin, west Azarbarijan, east Azarbaijan, Khoozestan, Busheher and Isfahan were surveyed and infected fields were identified during 2003-2004. Infected plants with wilt symptoms were identified. The samples were cultured on PDA (half concentration). The fungi grew after 3-4 days and each isolate was purified by single spore method. Thirty eight isolates were selected as Representative. The isolates were identified as Fusarium oxysporum by using Nelson key. The seedlings of Bonny Best cultivar was used for pathogenesis test. Thirty days old, TOMATO seedlings were inoculated with 5x106 spores/ml of each isolate. After inoculation, seedlings were cultured in a Random Complete Design with five replications (three seedlings in each replicate). The result showed that all isolates caused discoloration of xylem extended to stems and even petioles. Root and crown were not rotted. Growth at 27oC was quicker than that of 18oC. Therefore, their form special was determined as lycopersici. The severity of disease (Aggressiveness of each isolate) was evaluated based on 0-5 scale presented by Hemming et al., 2004. The result of data analysis showed that the pathogenicity of isolates was significant at 1% level. The mean comparative of infection severity showed that the isolate MD4 and DSF28 with 4.84 and 3.062 of mean infection were the most and least aggressive, respectively. The isolates inoculated on differential TOMATO cultivars, Bonny Best (lacking resistance gene), Manapal (resistant to race one) and Walter (resistant to races 1 & 2) in five replications and three seedlings in each replication in greenhouse condition. Bonny Best without any resistance gene wilted four weeks after inoculation. Manapal and Walter cultivars did not develop symptoms to any of tested isolates. Hence, they were determined as race one

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APA: Copy

AHMADVAND, R., & ZARBAKHSH, A.. (2008). DETERMINATION OF PHYSIOLOGICAL RACES OF TOMATO WILT AGENT IN MAJOR CULTIVATION AREAS IN IRAN. AGRICULTURAL RESEARCH, 8(1 (B)), 65-77. SID. https://sid.ir/paper/84775/en

Vancouver: Copy

AHMADVAND R., ZARBAKHSH A.. DETERMINATION OF PHYSIOLOGICAL RACES OF TOMATO WILT AGENT IN MAJOR CULTIVATION AREAS IN IRAN. AGRICULTURAL RESEARCH[Internet]. 2008;8(1 (B)):65-77. Available from: https://sid.ir/paper/84775/en

IEEE: Copy

R. AHMADVAND, and A. ZARBAKHSH, “DETERMINATION OF PHYSIOLOGICAL RACES OF TOMATO WILT AGENT IN MAJOR CULTIVATION AREAS IN IRAN,” AGRICULTURAL RESEARCH, vol. 8, no. 1 (B), pp. 65–77, 2008, [Online]. Available: https://sid.ir/paper/84775/en

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