knotweed reynoutria sprayed herbicide roundup destroys leaves leaf spray close-up invasive village house detail and

knotweed reynoutria invasive sprayed herbicide roundup destroys leaves leaf spray closeup detail fallopia japonica sakhalin japanese drought expansive species dangerous plants village house way path stem asia japan sachalinensis intruder neophyte reduces biodiversity botany eliminates herbicides mechanically contamination disaster calamity gatecrasher biomass europe green nature flower bushes ecology environmental