Flea beetle release site, N-Bar Ranch, Central Montana, USA: 1989 Yellow flowering plants are leafy spurge.

Flea beetle release site, N-Bar Ranch, Central Montana, USA: 1991 Note leafy spurge suppression in center of photo where insects are established.

Flea beetle release site, N-Bar Ranch, Central Montana, USA: 1996 Note spurge suppression after seven years.

Flea beetle on leafy spurge

Sheep grazing on leafy spurge