Herbicides threaten butterfly populations

[Gloria]

Commonly used herbicides seen as threat to endangered butterflies

Key to the butterfly's survival is the naked stem buckwheat plant, which is easily overgrown by the non-native plants ripgut brome, vetch and yellow starthistle

Refuge managers have tried to weed by hand but the process risks disturbing the buckwheat plants and butterfly eggs and larvae. And when refuge managers started spraying the plants with herbicides, they noticed the butterfly populations were dropping even more, says Stark

[Equilibrium]

And this comes as a surprise to refuge managers.....
Somebody should send them through a few IPM courses.