What to do with Halyomorpha?

[jhbratton]

@phma

Is there anything called witch’s broom in English and escoba de bruja in Spanish?

Yes, witch’s broom is the name for a deformity in tree twigs that causes a tight ball of twigs, most common in birch. And the 1968 book on British galls by Darlington says the witch’s broom can be caused by fungus or bacterium. Their galls are indistinguishable.