Increasing Profitability with Ripeners and Specialized Adjuvants.

YosoY Sugar Products Company

Presented at the September 1997 West Indies Sugar Technologist Conference, Georgetown, Guyana


This investigation discusses the results of specialized spray adjuvants when used with sugarcane ripeners. Sugarcane ripeners are known to increase sugar content per biomass ton. Specialized adjuvants were evaluated for additional sugar content increases when mixed directly with sugarcane ripeners. Fusilade (0.4 liter/hectare) and glyphosate (1 liter/hectare) were used as sugarcane ripeners. Mas Az˙car, a specialized adjuvant for sugarcane ripeners, was applied with the ripeners on half of the twenty-one (21) ripened tracts. Mas Az˙car was applied at 0.1 liter/hectare with fusilade and 0.50 liter/hectare with glyphosate.

All tracts were treated during the week of 24 April 1997 by the same flying service. Worthy-Park Sugarcane Estates tested three (3) varieties in eight (8) ripened sugarcane tracts . Bernard Lodge Sugarcane Estate tested one (1) variety in one (1) ripened sugarcane tract. Tropicana Sugarcane Estate tested seven (7) varieties in twelve (12) ripened sugarcane tracts.

The ripeners and specialized spray adjuvants were sprayed on the sugarcane tracts 28 to 42 days prior to harvest. Each ripened sugarcane tract had a control tracts of the same variety, age, and management practices. The control tracts received no ripeners or specialized adjuvants. All ripener and control tract were on the outside of all treatments. The specialized adjuvant, Mas Az˙car, was always on the inner area of the treatment.

A minimum of five (5) sugarcane stalks were sampled weekly from all tracts. All samples were analyzed by the Jamaican Sugar Industry Research Institute (SIRI). All sugarcane was sampled for Brix, Pol, Purity, Cane Pol, Fibre, JRCS and TCTS (Tons Cane/Tons Sugar). Each tract was analyzed for sugar value with the harvest day TCTS ratio. Final sugar value was calculated in United States Dollars and $0.10 USD per pound sugar.

The Worthy-Park trials used three different tracts. These were the Spring Piece 3 (SP 3), Back Savannah 2 (BS 2), and the Figtree. All Worthy-Park investigated tracts were first year sugarcane. All Worthy-Park tracts were harvested 28 days after treatment (DAT).

Both the SP 3 control and glyphosate-only tract yielded 53.17 tonnes/hectare, 23.72 tons/acre, and 6121.81 pounds of sugar, valued at $612.18/acre. The SP 3 glyphosate/Mas Az˙car tract yielded 53.17 tonnes/hectare, 23.72 tons/acre, and 5900.99 pounds of sugar, valued at $590.10/acre. This tract demonstrated a decreased profitability of the specialized adjuvant when compared to the ripener and control tracts. The control tract demonstrated better ripening in this tract and was only five rows wide on the outside of the trial area.

The SP 3 fusilade-only tract yielded 53.17 tonnes/hectare, 23.72 tons/acre, and 5608.04 pounds of sugar, valued at $560.80/acre. The SP 3 fusilade/Mas Az˙car tract yielded 53.17 tonnes/hectare, 23.72 tons/acre, and 5813.73 pounds of sugar, valued at $581.37/acre. The fusilade/Mas Az˙car treatment increased profitability by $20.57 per acre compared to the ripener.

The BS 2 control tract yielded 72.92 tonnes/hectare, 32.53 tons/acre, and 7213.64 pounds of sugar, valued at $721.36/acre. The BS 2 fusilade-only tract yielded 72.92 tonnes/hectare, 32.53 tons/acre, and 7189.73 pounds of sugar, valued at $718.97/acre. The control tract demonstrated better ripening than the ripener-only in this tract and was on the outside of the trial area.

The BS 2 fusilade/Mas Az˙car tract yielded 72.92 tonnes/hectare, 32.53 tons/acre, and 7636.98 pounds of sugar, valued at $763.70/acre. The fusilade/Mas Az˙car treatment increased profitability by $42.34 per acre when compared to the control tract. The fusilade/Mas Az˙car treatment increase profitability by $44.73 per acre when compared to the ripener only tract.

The Figtree control tract yielded 49.21 tonnes/hectare, 21.96 tons/acre, and 5434.46 pounds of sugar, valued at $543.45/acre. The Figtree glyphosate-only tract yielded 49.21 tonnes/hectare, 21.96 tons/acre, and 6798.76 pounds of sugar, valued at $679.88/acre. The Figtree glyphosate-only tract had a value of $136.43 more than the control tract.

The Figtree glyphosate/Mas Az˙car tract yielded 49.21 tonnes/hectare, 21.96 tons/acre, 7038.46 pounds of sugar, valued at $703.85/acre. The glyphosate/Mas Az˙car treatment increased profitability by $160.40 per acre when compared to the control tract. The glyphosate/Mas Az˙car treatment increased profitability by $23.97 per acre when compared to the ripener only tract.

 

The Bernard Lodge trial was divided between the control, glyphosate-only and glyphosate/Mas Az˙car treatments. The tracts were harvested in June of 1997. The 28 DAT data for Brix is 19.78, 19.90, and 21.58 for the control, glyphosate-only, and glyphosate/Mas Az˙car tracts respectively. The 28 DAT data for Pol is 18.01, 18.06, and 19.80 for the control, glyphosate-only, and glyphosate/Mas Az˙car tracts respectively. The 28 DAT data for Purity is 91.05, 90.75, and 91.75 for the control, glyphosate-only, and glyphosate/Mas Az˙car tracts respectively. The final TC/TS ratio was 9.81, 9.48 and 8.99 for the control, glyphosate-only, and glyphosate/Mas Az˙car tracts respectively.

The glyphosate-only tract decreased the TC/TS ratio by 0.33 compared to the control. The glyphosate/Mas Az˙car treatment decreased the TC/TS further. The glyphosate/Mas Az˙car treatment reduced the TC/TS by an additional 0.49 units when compared to the glyphosate-only data. Actual tonnage per acre is forthcoming. No financial data could be calculated.

The Tropicana Sugarcane Estate trials involved twelve (12) tracts and seven (7) varieties. The acreage was divided between the control, glyphosate-only and glyphosate/Mas Az˙car treatments. DAT 0, 15, and 28 data for Brix, Pol, and Purity are available. The tracts were harvested in July of 1997. Final harvest data is forthcoming. The DAT 28 values for the glyphosate-only and glyphosate/Mas Az˙car Brix, Pol, and Purity were equal to or greater than the Worthy-Park Figtree sugarcane values. These values correlated to a TCTS of 7.75 and 6.43, glyphosate-only and glyphosate/Mas Az˙car respectively.

These trials demonstrated sugarcane ripeners increased sugar content per biomass ton. Furthermore, the use of Mas Az˙car, a specialized proprietary adjuvant, increased the sugar value by an additional $20.57 to $160.40 per acre when compared to sugarcane ripeners. Use of sugarcane ripeners and the specialized spray adjuvant Mas Az˙car increased sugarcane profitability.



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