NOVELTY - Obtaining sugarcane comprising stilbenes, comprises: (a) providing sugarcane billets of a predetermined thickness; (b) irradiating the cut side of sugarcane billets with UV-C and/or UV-B light at an intensity and for duration of time to produce significant increase in a level of at least one stilbene in the irradiated billets compared to a level of stilbene in billets that are not irradiated; (c) maintaining the irradiated sugarcane billets for at least 3-20 days; and (d) selecting the irradiated sugarcane billets.    USE - The method is useful for producing sugarcane which is useful for producing stilbenes (resveratrol and piceatannol): and in bagasse for producing biofuel (all claimed); and that have numerous health benefits including cancer preventative properties, antiinflammatory properties, prevention of atherosclerosis and coronary diseases, antioxidant properties and antileukemic properties, and used as a supplement or ingredient in food and beverage products, and in beverage products or medicines. No biological data given.    ADVANTAGE - The method: provides sugarcane fiber with enhanced levels of stilbenes (trans form); minimizes or eliminates isomerization of resveratrol and piceatannol by maintaining the sugarcane billets in darkness or low light or in a room with fluorescent lights equipped with UV-absorbing shields. The bagasse obtained from sugarcane (high in stilbenes) does not isomerize resveratrol, preferably darkness. The naturally produced stilbene has increased levels of health promoting compounds that are readily incorporated into food products. The stilbene-enhanced sugarcane or sugarcane juice enables consumers to access the health-promoting benefits of stilbenes without the consumption of alcohol. The stilbenes are extracted at the same time as the generation of sucrose takes place, and marketed separately.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) sugarcane comprising significant levels of stilbenes made by the method (I);    (2) bagasse obtained from the sugarcane;    (3) biofuel made from the bagasse of sugarcane;    (4) producing (II) sugarcane leaves, comprising: providing sugarcane leaves of a predetermined thickness; irradiating the sugarcane leaves with UV-C and/or UV-B light at intensity and for duration of time to produce significant increase in level of at least one stilbene in the irradiated leaves compared to a level of stilbene in leaves that are not irradiated; and maintaining the irradiated sugarcane leaves for at least 3 days before selecting the irradiated sugarcane leaves;    (5) sugarcane leaves made by the method (II); and    (6) producing (III) sugarcane billets, comprising: providing sugarcane billets having 2-50 mm in thickness; maintaining the sugarcane for at least about 3-20 days under conditions that prevent stilbene isomerization at 0-40 degrees C; and then selecting the irradiated sugarcane billets.