There are major differences in external structures, organ systems, and post-embryonic development that seemingly point to evolutionary divergence between the “true” insects and three other closely allied groups: Protura, Diplura, and Collembola. Apart from all Hexapods, Collembola are true Hexapods which interact directly on mycorrhiza. However, little work have been done around the world. May anyone help me to measure the activity of Collembolans live directly feeding on mycorrhiza ?