There are multiple artists using this name:

1) Ecocide was a female-fronted crust punk band from San Antonio, Texas, USA (2006-2011)
Bandcamp

2) Ecocide is a Death/thrash metal band from Haarlem, Netherlands. Formed in 2012.
Bandcamp

3) Ecocide. Fast hardcore 4 piece from Dayton, Ohio circa 1999-2000. Release one tape on 3-toed records. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.