pythogenesis

py·tho·gen·e·sis

(pī'thō-jen'ĕ-sis),
1. Origination from decaying matter.
2. The causation of decay.
[G. pythō, to decay, + genesis, origin]

pythogenesis

(pī″thō-jĕn′ĕ-sĭs) [Gr. pythein, to rot, + genesis, generation, birth]
Originating in decaying matter.