The Fungal Payload weapons package can be used to create Fungal Missiles. It can be used only with the Missile chassis.
A Fungal Missile detonation destroys any improvements in the square. Additionally, the detonation covers 1–4 squares of terrain with fungus, depending on the reactor type. A Fission Plant covers one square, a Singularity Engine four squares. The detonation may also trigger native life forms from dormant spores. Fungal Missiles are considered delivery platforms instead of combat units, and so may not target bases or units.
To target a square, move the missile to the desired target (cannot be a sea-square) and press the ‘I’ key.