Attack of plant disturbing organism on pineapple (Ananas comosus) is one of the factors causing the low production of pineapple. One of the most common diseases that attack pineapple (Ananas comosus) is leaf spot disease. Curvularia sp is a disease pathogen that causes leaf spot on pineapple plants. The purpose of this study was to determine the development of leaf spot disease Curvularia sp on…