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Journal articles
Field evaluation of the effectiveness of thermotherapy against cassava mosaic disease in Central African Republic
Abstract : Aim: The effectiveness of thermotherapy in managing cassava mosaic disease (CMD) was studied on a susceptible local cultivar in the field in the epidemiological conditions. Study Design: The field was laid out in randomized complete block design Place and Duration: Field experiment was conducted in forest zone at Kapou located in south west of Central African Republic according to University of Bangui during August 2010 and July 2011. Methodology: Diseased cassava cuttings were treated in a heated water bath at temperatures ranging from 43ºC to 51ºC for 30 min before being grown for 12 months in the field. Results: Temperatures from 43ºC to 49ºC were found to have no deleterious effect on either the survival of cuttings or on plant regeneration. One month after planting (MAP), up to 40% of the cuttings treated at 47ºC to 49ºC had regenerated a plant with no CMD symptoms compared to 7% of untreated cuttings. Between two and five MAP, cassava cuttings treated at 49ºC produced plants with a significantly lower incidence of CMD than plants produced from untreated cuttings. All plants grown from treated cuttings developed significantly less severe CMD symptoms than untreated cuttings between 8 and 12 months after planting. The highest tuberous root yield was obtained with diseased cuttings treated at 49ºC (4.7kg/plant), equivalent to the yield from untreated symptomless cuttings (4.6kg/plant). Conclusion: Our data clearly demonstrate the value of thermotherapy to maintain a high level of production using local cultivars under severe CMD epidemic conditions.(Résumé d'auteur)
Keywords :
Biologie végétale
Sciences du vivant
https://hal.univ-reunion.fr/hal-01456732
Contributor : Réunion Univ <>
Submitted on : Sunday, February 5, 2017 - 8:25:02 PM
Last modification on : Thursday, July 1, 2021 - 3:37:06 AM
Contributor : Réunion Univ <>
Submitted on : Sunday, February 5, 2017 - 8:25:02 PM
Last modification on : Thursday, July 1, 2021 - 3:37:06 AM