The larvae feed on a wide range of plants, including Zea mays, Livistona humilis, Helianthus annuus, Durio zibethinus, Carica papaya, Ricinus communis, Planchonia careya, Sorghum bicolor, Macadamia integrifolia, Prunus persica, Citrus limon, Nephelium lappaceum, Solanum melongena, Brachychiton acerifolium and Elettaria cardamomum.
As a herbivore Phyllium bioculatum mainly eats mango, guava, cherry, dewberry, raspberry, blackberry, oak, bramble, Nephelium lappaceum (Rambutan), and in captivity some accept Quercus and Rubus species.
The larvae feed on the leaves, buds, flowers and fruit of Gossypium, Nephelium lappaceum and Durio zibethinus.