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Inhaled?Whether this gas is


Seeping?Whether this gas can
seep through walls



ID?Use this ID to Wish for the item


Spawns in



Magenta showers the heterotrophs in a wet film that inhibits their absorption of dead animal and plant-things.


Fungicide is a type of gas that is damaging to fungus and to objects composed of live fungal matter. fungicide can seep through walls and other occluding objects.


Common sources of fungicide, with their level and density, include:[1]

Source Gas Level Gas Density Reference
fungicide pump 1 4d104-40 (Avg: 22) in each cell that a pump projectile passes through
8d108-80 (Avg: 44) in each cell where a projectile hits a solid target
5 projectiles fired per shot, gas emissions from each projectile stack
billowing conch of the Aji 5 800 per turn, divided evenly into non-solid adjacent squares [4]
fungicide gas grenade mk I 1 200 [5][6]
fungicide gas grenade mk II 1 400 [5][6]
fungicide gas grenade mk III 1 800 [5][6]
vents with mold particulate 1 1d60+4041-100 (Avg: 70.5) [7]


The damage done by fungicide depends on the target.[8] For a more detailed breakdown of the types of targets listed here, refer to the Objects Affected section below.

  • Fungicide deals damage to mutated fungus and those with fungal infections or mutated fungal body parts. Mutated fungus more or less encompasses all fungus that are combat-capable and have faction associations, except broodpuffs.
  • Fungicide deals significantly increased damage to all other fungus, generally meaning any sessile fungus that are not capable of combat and do not have faction associations.
  • Fungicide deals significantly increased damage to objects composed of live fungal matter.
  • Fungicide deals no damage to anything else.

The following damage formulas are used to calculate defoliant and fungicide damage:[8]

Formula Notes
Mutated fungus
( Density × GasLevel ) / 200
(rounded up)
Sessile fungus and fungal-matter
( 0.75 × GasLevel + 0.25 ) × Density
(rounded up)

In theory, this means that a typical cloud of fungicide gas (~100 density) will deal approximately:

  • 1 damage per turn to mutated fungus and creatures with fungal infections.
  • 100 damage per turn to sessile fungus or objects composed of live fungal matter.

In practice, gas damage is highly variable due to a significant amount of randomization involved in gas behavior. Gas is constantly moving between cells, dissipating over time, merging with other gas, and being affected by random calculations in the game engine. Its density, which is the main predictor of damage, is always changing. For more information about the mechanics of gas behavior, visit the Gas page.

The density of fungicide can get significantly higher than 100 if several sources of it are combined, such as multiple fungicide gas grenade mk IIIs or successive shots from a fungicide pump. Because fungicide can seep through walls, however, it will not be contained by enclosed rooms or tight hallways - it will continue to spread and dissipate after it is released.

Objects Affected

Objects Composed of Live Fungal Matter

(Significant Damage)


This information is reliable as of patch
  1. XRL.World.Parts.Gas
  2. XRL.World.Parts.GasOnEntering
  3. XRL.World.Parts.GasOnHit
  4. XRL.World.Parts.AjiConch
  5. 5.0 5.1 5.2 XRL.World.Parts.GasGrenade
  6. 6.0 6.1 6.2 ObjectBlueprints.xml
  7. XRL.World.Parts.WalltrapGas
  8. 8.0 8.1 XRL.World.Parts.GasDamaging