The effect of Sugarcane yellow leaf virus infection on yield of sugarcane in Louisiana
2009
Grisham, M.P. | Eggleston, G. | Hoy, J.W. | Viator, R.P.
A series of field experiments were conducted to determine the effect of Sugarcane yellow leaf virus (ScYLV) infection on cane and sucrose yield of four commercial sugarcane cultivars (LCP 85-384, Ho 95-988, HoCP 96-540 and L 97-128) that occupied 93% of the sugarcane production area in Louisiana in 2007. As in commercial fields, visual symptoms of sugarcane yellow leaf disease caused by ScYLV were not observed in the plants of this study. The results of this study, however, indicated that ScYLV infection can cause loss of cane and sucrose yields. In the first of two experiments that included cultivar LCP 85-384, cane and sucrose yields did not differ between control and ScYLV-infected plants across the crop cycle (plant-cane, first-ratoon, and second-ratoon crops). In the second experiment, cane yield was reduced in ScYLV-infected plants of LCP 85-384 across the crop cycle; however, sucrose yield was not reduced because of an increase in the sucrose content of infected plants. The only observed effect of ScYLV-infection in cultivar Ho 95-988 was an increase in sucrose content of the cane. Cane and sucrose yields were reduced in ScYLV-infected plants of cultivars HoCP 96-540 and L 97-128. Currently, all sugarcane cultivars recommended for planting in Louisiana are susceptible to ScYLV infection; however, the effect of the infection on cane and sucrose yield varies. To minimize the potential for yield loss from ScYLV infection, growers should plant seed cane free of the virus infection.
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