AskIFAS Powered by EDIS

Sucrose Accumulation Maturity Curves for CP 84-1198

Hardev S. Sandhu, Maninder P. Singh, Robert A. Gilbert, James M. Shine, Jr., and Ronald W. Rice


Sugarcane (a complex hybrid of Saccharum spp.) is harvested during a five-month period (October to March) in south Florida. "Early maturing" cultivars milled in October or November may not have reached their peak sucrose content, but may have higher sugar per ton (SPT, lb sucrose per ton of sugarcane biomass) than other cultivars at the onset of milling operations (Miller and James 1977). Under current industry milling capacities, harvesting the 397,000 acres of Florida sugarcane takes roughly five to six months depending upon weather conditions. Unavoidably, sugarcane plants harvested during the early harvest period have not yet achieved maximum sugar content. Consequently, sugar content for any given cultivar will change over the course of the harvest season, which can impact the profitability of the harvest. Maturity curves of SPT vs. time have been developed for sugarcane cultivars in South Africa (Bond 1982), Louisiana (Legendre and Fanguy 1975; Legendre 1985; Richard et al. 1981), and Mauritius (Mamet and Galwey 1999). Although it is known that sucrose accumulation rates vary between varieties, maturity curves for recently released "CP" sugarcane cultivars (those developed at the USDA-ARS Sugarcane Field Station in Canal Point, Florida) have not been reported since 1977 (Rice 1974; Miller and James 1977). CP cultivars occupy more than 85 percent of Florida sugarcane acreage (VanWeelden et al. 2020), and are also economically important (Tew 2003) in many countries, including Argentina (25% of total acreage), Belize (16%), El Salvador (50%), Guatemala (65%), Honduras (47%), Mexico (15%), Morocco (54%), Nicaragua (75%), Senegal (9%), and Venezuela (9%). Since most sugarcane growers in Florida plant a diverse selection of cultivars, these maturity curves are needed as tools to help growers make informed choices regarding harvest scheduling decisions.

This publication presents the sucrose accumulation maturity curves for different crop ages (plant cane, first ratoon, and second ratoon) of CP 84-1198. CP 84-1198 harvest samples were collected at two-week intervals at five locations over four harvest seasons in the Everglades Agricultural Area (EAA). Biomass and sugar yields were determined on all samples in order to generate SPT trends over time. A full comparison of CP 84-1198 SPT trends with 12 other CP cultivars may be found in EDIS publication SC069, Maturity Curves and Harvest Schedule Recommendations for CP Sugarcane Varieties (

Cultivar Description

CP 84-1198 acreage decreased in last three years and it is currently grown on less than 1%. of the EAA sugarcane acreage. This cultivar is prone to uprooting on shallow soils and also deeper mucks with a high sawgrass parent material component.

Maturity Curves

Figure 1 presents the sugar per ton (SPT, lb sugar/ton sugarcane biomass) for CP 84-1198 from mid-October to mid-March. Separate curves are presented for plant cane, first ratoon, second ratoon, and the entire data set.

Research has shown that older ratoon crops generally have higher SPT values but lower tonnage (Glaz et al. 1989; MacColl 1976). Thus, growers should generally expect the SPT of their sugarcane crop to increase with crop age (see Figure 1). The mean SPT of CP 84-1198 increased from 252 lb/ton in plant cane to 253 lb/ton in first ratoon, and 269 lb/ton in second ratoon. The overall mean across crop ages ranked ninth out of 13 CP cultivars.

Grower recommendations are based on the entire data set across all crop ages. Early-season predicted SPT for CP 84-1198 at the onset of harvest on October 14 was 197 lb/ton (ranked 10th out of 13 cultivars), and maximum predicted SPT was 276 lb/ton on February 1 (ranked eighth out of 13 cultivars). In comparison to other CP cultivars, CP 84-1198 matures slowly and should be harvested during the last 100 days of the harvest season (see

Figure 1. Sucrose Accumulation Maturity Curves for CP 84-1198.
Figure 1.  Sucrose Accumulation Maturity Curves for CP 84-1198.



Bond, R. S. 1982. "Maturity differences between varieties in the selection programme." Proc. Ann. Cong. S. African Sugar Technol. Assoc. 56: 136–139.

Gilbert, R. A., J. M. Shine, Jr., J. D. Miller, and R.W. Rice. 2004. Sucrose Accumulation and Harvest Schedule Recommendations for CP Sugarcane Varieties. Gainesville: University of Florida Institute of Food and Agricultural Sciences.

Glaz, B., M. F. Ulloa, and R. Parrado. 1989. "Cultivation, cultivar and crop age effects on sugarcane." Agron. J. 81: 163–167.

Legendre, B. L. 1985. "Changes in juice quality of nine commercial sugarcane varieties grown in Louisiana." J. Am. Soc. Sugarcane Technol. 4: 54–57.

Legendre, B.L., and H. Fanguy. 1975. "Relative maturity of six commercial sugarcane varieties grown in Louisiana during 1973." Sugar Bull. 53 (2): 6–8.

MacColl, D. 1976. "Growth and sugar accumulation of sugarcane: II. Percentage of sugar in relation to pattern of growth." Expl. Agric. 12: 369–377.

Mamet, L. D., and N. W. Galwey. 1999. "A relationship between stalk elongation and earliness of ripening in sugarcane." Expl. Agric. 35: 283–291.

Miller, J. D., and N. I. James. 1977. "Maturity of six sugarcane varieties in Florida." Proc. Am. Soc. Sugar Cane Tech. 7: 107–111.

Richard, C. A., F. A. Martin, and G. M. Dill. 1981. "Maturity patterns of several Louisiana sugarcane varieties." J. Am. Soc. Sugarcane Technol. 8: 62–65.

Rice, E. 1974. "Maturity studies of sugarcane varieties in Florida." Proc. Am. Soc. Sugarcane Technol. 4: 33–35.

Tew, T. L. 2003. "World sugarcane variety census—Year 2000." Sugar Cane International March/April 2003: 12–18.

VanWeelden, M., S. Swanson, W. Davidson, M. Baltazar, and R. Rice. 2020. "Sugarcane variety census-Florida 2019." Sugar J. 83: 8–20.

Publication #SS-AGR-218

Release Date:September 3, 2021

Related Experts

Singh, Maninder P.

University of Florida

Sandhu, Hardev S


University of Florida

Gilbert, Robert A.


University of Florida

Rice, Ronald W.

County agent

University of Florida

Related Units

Fact Sheet

About this Publication

This document is SS-AGR-218, one of a series of the Agronomy Department, UF/IFAS Extension. Original publication date April 2004. Revised October 2014, January 2018, and July 2021. Visit the EDIS website at for the currently supported version of this publication. This publication is also a part of the Florida Sugarcane Handbook, an electronic publication of the Agronomy Department. For more information, contact the editor of the Sugarcane Handbook, Hardev Sandhu (

About the Authors

Hardev S. Sandhu, associate professor, Agronomy Department, UF/IFAS Everglades Research and Education Center; Maninder P. Singh, former assistant scientist, Agronomy Department, UF/IFAS EREC; Robert A. Gilbert, Dean of research, UF/IFAS; James M. Shine, Jr., Sugar Cane Grower's Cooperative of Florida; and Ronald W. Rice, Extension director, UF/IFAS Extension Palm Beach County; UF/IFAS Extension, Gainesville, FL 32611.


  • Hardev Sandhu