ABSTRACT Maize (Zea mays L.) is an important commodity as food, animal feed and others. In Riau Province, maize production is declining due to pest attacks, especially aphids (Hemiptera: Aphididae), which can reduce yields by up to 78%. Aphids damage plants by sucking fluids, producing honeydew, and becoming virus vectors. Observations on the species and abundance of aphids are needed to …