Survival of Claviceps africana Within Sorghum Panicles at Several Texas Locations

Plant Disease
Louis K PromNoe Montes

Abstract

Survival of the sorghum ergot fungus, Claviceps africana, based on pathogenicity of recovered macroconidia used to inoculate sorghum (Sorghum bicolor), was measured in 2000 over the course of the year at five locations in Texas representing three climates. The experiment was repeated in 2001. Sphacelia associated with infected sorghum panicles were placed in nylon mesh bags and either buried at a 10-cm depth, placed on the soil surface, or suspended 61 cm above the ground. Samples were recovered after 4, 8, and 12 months and assessed for pathogenicity of surviving macroconidia by macerating tissue in water and spraying it onto panicles of flowering male-sterile sorghum in the greenhouse. Survival of ergot macroconidia in recovered panicles declined at all locations after the first 4 months that panicles were left in the field. The decline in viability during this period was greater in 2001 than in 2000. In 2000, survival after 4 months was greatest at Lubbock and Bushland, which have a continental steppe climate, than at the other three Texas locations, Weslaco and Corpus Christi, which have a subtropical subhumid climate, and College Station, which has a subtropical humid climate. However, this difference in survival was not a...Continue Reading

References

Mar 1, 1973·Carbohydrate Research·R L MowerC E Ballou
Apr 1, 2000·Plant Disease·Sylvie PažoutováRichard A Frederiksen
Apr 1, 1998·Plant Disease·Ranajit BandyopadhyayMalcolm J Ryley

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Citations

Feb 24, 2015·World Journal of Microbiology & Biotechnology·Sui Sheng T HuaSiov Bouy L Sarreal
Jun 16, 2009·Molecular Plant Pathology·Thomas HaarmannPaul Tudzynski

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