It's toxic," Pires says. "It turns their guts inside out." Glucosinolates are a major component of mustard oil, so for simplicity's sake, let's call the defense, as Pires does, "a mustard oil bomb." ...

Cabbage white butterflies – Pieris rapae – are one of the most ... to chemicals found in brassica leaves. These are the mustard oil glucosides (glucosinolates) – particularly sinigrin ...

We may have our Eastern Mediterranean neighbors to thank for the multivoltine species, the Pieris rapae cabbage white butterflies in our garden these days. Like the monarch butterfly, the cabbage ...