NOVELTY - Sorghum plant comprising an exogenous nucleic acid comprising a regulatory region operably linked to a plant sterility sequence, is new, where the plant sterility sequence affects a developmental stage comprising: spikelet meristem identity; establishment of floral meristem identity; and floral organ initiation, development, or function; and the stalk of the sorghum plant has a sucrose purity that is higher at maturity than that of a corresponding control plant that lacks the exogenous nucleic acid.    USE - The Sorghum plants is useful in food, agricultural, animal feed and energy production industries (e.g. biofuels such as ethanol). The Sorghum plants is useful for reducing susceptibility to ergot fungal infections as preventing development of an ovary, such as spikelet meristem identity, establishment of floral meristem identity, or floral organ initiation, or preventing the fungal spores from infecting the stigma.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a F1 transgenic Sorghum seeds comprising an exogenous nucleic acid comprising a promoter operably linked to a plant sterility sequence, where the F1 sorghum plants grown from the F1 seeds express the plant sterility sequence, and the stalks of the F1 sorghum plants have a sucrose purity that is higher at maturity than that from corresponding control plants that lack the exogenous nucleic acid; (2) a method-I of making Sorghum F1 seeds, comprising crossing the first sorghum plants and the second sorghum plants, where the first or the second Sorghum plants comprise an exogenous nucleic acid, the exogenous nucleic acid comprising a promoter operably linked to the plant sterility sequence, and the first and second Sorghum plants are male sterile and harvesting F1 seed from the first Sorghum plants, where the Sorghum plants grown from the F1 seed express the plant sterility sequence, and stalks of the Sorghum plants have a sucrose purity at maturity that is higher than that of a corresponding control plant lacking the exogenous nucleic acid; (3) a sweet sorghum plant made by the method; #a method-II of making sucrose crystals, comprising extracting juice from the plant and crystallizing sucrose from the juice; (4) F1 transgenic Sorghum seeds, comprising a first exogenous nucleic acid comprising a transcription upstream activation sequence (UAS) and a first promoter, where the UAS and the first promoter are operably linked to the plant sterility sequence, a second exogenous nucleic acid comprising a second promoter operably linked to a transcription factor, where the transcription factor binds the UAS, where the sorghum plants grown from the F1 seeds express the plant sterility sequence, and the stalks of the sorghum plants have a sucrose purity that is higher at maturity that lack the exogenous nucleic acid; (5) a method-III of making the Sorghum plant; (6) a method-IV of growing sorghum, comprising growing F1 Sorghum plants and harvesting biomass from the Sorghum plants; (7) a process for making a bio fuel, comprising harvesting biomass from Sorghum plants grown from F1 seeds to obtain harvested sorghum biomass, extracting Sorghum juice from the harvested sorghum biomass to obtain extracted juice comprising sugar, using the sugar of the extracted juice in a fermentation reaction to produce a fermentation product comprising a biofuel and isolating the biofuel from the fermentation product to obtain a composition comprising the biofuel; (8) use of a plant sterility sequence in making a plant having stalks of with increased sugar and sucrose purity, where the plant sterility sequence reduces expression of a nucleic acid having at least 80% identity to a nucleotide sequence comprising SEQ ID NO: 1-19; and (9) use of a plant in making ethanol, comprising an exogenous nucleic acid comprising a regulatory region operably linked to plant sterility sequence that affects a developmental stage comprising spikelet meristem identity, establishment of floral meristem identity and floral organ initiation, development, or function, where stalks of the plant have increased sucrose purity, where the sequences not defined here may be found at ftp://ftp.wipo.int/pub/published-pct-sequences/publication.