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

Author:

Boukari Wardatou1,Kaye Claudia2,Wei Chunyan13,Hincapie Martha1,LaBorde Chris2,Irey Michael2,Rott Philippe1ORCID

Affiliation:

1. Plant Pathology Department, Everglades Research and Education Center, University of Florida, Belle Glade 33430, FL, U.S.A.

2. U.S. Sugar Corporation, Clewiston 33440, FL, U.S.A.

3. State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, Guangxi University, Nanning 530005, China

Abstract

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.

Funder

Florida Sugar Cane League

U.S. Department of Agriculture National Institute of Food and Agriculture

Publisher

Scientific Societies

Subject

Plant Science,Agronomy and Crop Science

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