Bloatfly larva

The bloatfly larva is a type of ammunition in Fallout 4.

Gameplay
The blotafly larva syringe is a small dart used only in the syringer. Unlike most ammunition in the game, it is located under the "AID" section of the Pip-Boy menu, as a consumable, and has a small amount of weight.

Enemies hit by the syringe are infected with a bloatfly larva for 30 seconds. Should they die within this period, there is a 10% chance that a bloatfly will spawn from their corpse. The bloatfly will be hostile towards everyone and can be of any variant. The syringe does not work on enemies with poison immunity.

Crafting
The bloatfly larva syringe can also be used as a component to craft the mounted bloatfly head.

Locations
The bloatfly larva syringe can be crafted at a chemistry station.