Inocula is often a misspelling of inoculum.
Inocula has no English definition.
As a noun inoculum is
the active material used in an inoculation; an inoculant.
inocula
Not English
Inocula has no English definition. It may be misspelled.
inoculum
English
Noun
(inocula)
The active material used in an inoculation; an inoculant