Remove Flower Stalks to Prevent Imidacloprid Toxicity?

[bigdaddyscondition]

I treated one of my Beaucarnia recurvatas (ponytail palms) with systemic imidacloprid about 8 weeks ago, a soil drench. Now the plant is sprouting flower stalks. Should I cut off the flower stalks before they bloom to prevent pollinators from ingesting imidacloprid that still may be present in the plant's vascular system? Or is it safe to let the flowers appear?

It's much easier to gauge when to cut down a flower stalk in agaves, since flowering is generally a one-shot deal at the end of the agave's natural life. But with an annually blooming plant that requires treatment every six months, it's tough to know when the plant might not be toxic. Thanks for any guidance.

[Tom in Tucson]

That's an excellent idea.