Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2003
Publication Date: 6/30/2003
Citation: Comstock, J.C., Miller, J.D.and Schnell, R.J. 2003. Incidence of Sugarcane Yellow Leaf Virus in Clones of Saccharum spp. in the World Collection at Miami and in the Collection at the Sugarcane Field Station, Canal Point. American Society of Sugar Cane Technologists. Interpretive Summary: The paper shows that sugarcane yields are reduced by sugarcane yellow leaf virus. Losses in cane weight and sugar per plot were reported at 11 percent. Tissue culture derived seedcane that is disease-free increased yield parameters: numbers of stalks, cane weight and sugar per plot. The use of tissue culture derived seedcane as a standard disease control practice may increase sugarcane yield
Technical Abstract: The yield parameters were determined for five CP-cultivars to compare tissue culture derived and heat-treated seedcane. Yield parameters measured in plant cane and first ratoon were number of stalks per plot, plot weight, % sugar yield and kg sucrose per plot. For the plant crop, the yield parameters (number of stalks, weight and sucrose per plot) were significantly higher for plants in the tissue-culture derived plots over plots planted with heat-treated seedcane for the cultivars when analyzed combining data of all cultivars (CP 72-1210, CP 80-1827, CP 84-1198, CP 85-1382 and CP 89-2143) and was significant for each cultivar when analyzed individually. In the subsequent first ratoon crop, all yield parameters were significantly higher for plants in the tissue-culture derived plots than plots planted with heat-treated seedcane for the cultivars when analyzed combining data of all cultivars. The statistical results of the analysis of individual cultivars varied in the first ratoon. A second test compared the yield parameters of virus-free and SCYLV infected plants. Analyzing all cultivars combined, the plot weight and kg sugar per plot of virus-free treatment were significantly higher at P ' 0.05 than the SCYLV-infected treatment. The statistically differences for individual cultivars were: kg sucrose per plot for CP 84-1198 and weight per plot for CP 89-2143, both at P ' 0.05 were higher for plants in the SCYLV-free plots than the plots planted using infected-plants. The results indicate a benefit from using tissue culture derived seedcane, especially if effective at controlling SCYLV.