Evaluation of the resistance of commercial sugar beet cultivars to Pythium aphanidermatum

Document Type : Research Paper

Authors

1 Department of Plant Protection, Faculty of Agricultural Sciences and Food Industry, Islamic Azad University, Science and Research Branch, Tehran, Iran.

2 Sugar Beet Seed Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran.

Abstract

The pathogen, Pythium aphanidermatum is one of the causal agents of sugar beet root rot in Iran. In order to evaluate the reaction of cultivars to the pathogen, at first, the screening method of evaluation was optimized. Then, a number of 24 cultivars that are commonly cultivated in Iran were evaluated against the pathogen. Three different evaluation methods in the greenhouse including grass leaf suspension, oospore suspension, and grass leaf suspension using through making wounds on the roots were compared with each other. A number of 12 cultivars were inoculated with these three inoculation methods. The results showed that positive and significant correlation of the three methods with each other. Then, 24 commercial sugar beet cultivars were evaluated with grass leaf suspension method under the greenhouse conditions. Based on the results of the evaluation of the 24 commercial cultivars of sugar beet and the comparison of the disease index of Pythium root rot based on Duncan's multi-range test, Ivano, Boomrang, Flores and Tous had the lowest rot index among the cultivars with the average index of 2.58, 2.65, 2.72 and 2.75 respectively and were introduced as resistant cultivars to the disease. Cultivars Jolgeh, Rasool, Shirin and Jam were categorized as susceptible.

Keywords

References

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Journal of Applied Research in Plant Protection
Volume 13, Issue 3
September 2024
Pages 219-229

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History

  • Receive Date: 06 June 2023
  • Revise Date: 24 February 2024
  • Accept Date: 25 February 2024

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