International Sugar Journal

A nutritional perspective of sugarcane resistance to stalk borers and sap feeders † [Full subscriber]

Two relatively new key species in Louisiana, USA that conform to the plant stress hypothesis are the Mexican rice borer, Eoreuma loftini (Dyar) and the sugarcane aphid, Melanaphis sacchari (Zehntner). High performance liquid chromatography differentiated insect resistant and susceptible sugarcane cultivars based on nutritional profiles involving free amino acids (FAAs). For E. loftini susceptible cultivar LCP 85-384, concentrations of essential and nonessential FAAs in whole leaf tissue samples were more than twice as high as in the resistant cultivar HoCP 85-845. Similarly, M. sacchari susceptible L 97-128 exhibited more than three fold higher concentrations of essential FAAs in the phloem…

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