@article{Alexander_1978, title={Efficiency of Chemical Ripener Action in Sugarcane. VI. Growth and Qualitative Responses to Polaris as a Function of the Area of Treated Leaf Surface}, volume={62}, url={https://revistas.upr.edu/index.php/jaupr/article/view/10364}, DOI={10.46429/jaupr.v62i3.10364}, abstractNote={Growth and qualitative effects of Polaris (N,N-bis [phosphonomethyl] glycine) were examined in early-adult sugarcane in which varying proportions of the green leaf surface were treated. The blades of leaf ranks 0 to <sup>+</sup>4 were treated individually with an aqueous Polaris solution containing 3,000 p/m active material. Treatment areas ranged from 10 to 100% of the receptive leaf canopy. Parameters for growth, juice quality, and tissue sucrose and protein components all indicated that 100% of the green leaf surface must be treated to produce maximum responses. Polaris was growth-stimulatory when applied to only 10% of the leaf surface. Significant but inconsistent qualitative responses were obtained where 10 to 60% of the leaf surface was treated. Acid invertase was the only parameter showing a significant response at the lowest treatment level and th rough the highest treatment level. The implications of these findings for the treatment of field cane are discussed.}, number={3}, journal={The Journal of Agriculture of the University of Puerto Rico}, author={Alexander, Alex G.}, year={1978}, month={Jul.}, pages={265–272} }