Data Views Total Plants: 3 CSV Excel PDF Click on column headings to sort table by that column Plant Part All Fruit Juice Husk Essent. Oil Silk Essent. Oil Low PPM High PPM StdDev *Reference Zea mays Husk Essent. Oil 19000.0 21000.0 * Zea mays Silk Essent. Oil -- 3000.0 * Citrullus lanatus Fruit Juice -- -- * *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.