Field infection of virus-free sugarcane by Sugarcane yellow leaf virus and effect of yellow leaf on sugarcane grown on organic and on mineral soils in Florida

Boukari Wardatou, Kaye Claudia, Wei Chunyan, Hincapie Martha, LaBorde Chris, Irey Mike S., Rott Philippe. 2019. Field infection of virus-free sugarcane by Sugarcane yellow leaf virus and effect of yellow leaf on sugarcane grown on organic and on mineral soils in Florida. Plant Disease, 103 : 2367-2373.

Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Sugarcane yellow leaf virus (SCYLV), the causal agent of yellow leaf, is widespread in Florida. Two field trials were set up, one on organic soil and one on mineral soil, to investigate the rate and timing of sugarcane infection by SCYLV under field conditions and the effect of the virus on yield. Each trial consisted of plots planted with healthy or SCYLV-infected seed cane of two commercial cultivars. Virus prevalence varied from 83 to 100% in plots planted with infected seed cane regardless of cultivar, location, and crop season. On organic soil, plants of virus-free plots became progressively infected in plant cane and first ratoon crops. On mineral soil, healthy sugarcane became initially infected in the first ratoon crop. After three crop seasons, the highest SCYLV prevalence rates were 33 and 7% on organic and mineral soils, respectively. No significant negative effect of SCYLV on yield was found in plant cane crop regardless of cultivar and soil type. However, yield reductions in ratoon crops varied from nonsignificant to 27% depending on cultivar and soil type. Low virus prevalence observed after three crop seasons suggested that planting virus-free seed cane should limit the impact of SCYLV on sugarcane production in Florida.

Mots-clés Agrovoc : virus, canne à sucre, semence, rendement des cultures, type de sol chimique, type de sol écologique

Mots-clés géographiques Agrovoc : Floride, États-Unis d'Amérique

Classification Agris : H20 - Maladies des plantes
P33 - Chimie et physique du sol
F03 - Production et traitement des semences

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

• Boukari Wardatou, University of Florida (USA)
• Kaye Claudia, US Sugar Corporation (USA)
• Wei Chunyan, University of Florida (USA)
• Hincapie Martha, University of Florida (USA)
• LaBorde Chris, US Sugar Corporation (USA)
• Irey Mike S., Sugar Corporation (USA)
• Rott Philippe, CIRAD-BIOS-UMR BGPI (USA) ORCID: 0000-0001-6085-6159 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/594370/)

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