Insect droppings, commonly known as insect frass, may seem useless and downright disgusting, but scientists found that this waste can improve soil health when added as a fertilizer in farming. Insect droppings, commonly known as insect frass, may seem useless and downright disgusting, but scientists found that this waste can improve soil health when added as a fertilizer in farming. Agriculture Phys.org – latest science and technology news stories