insecticidally

Anisatin is an extremely toxic, insecticidally active component of the Shikimi plant.

The 2-S alpha (or SS) configuration, known as esfenvalerate, is the most insecticidally active isomer.

Gamma-cyhalothrin is the most insecticidally active isomer of cyhalothrin/lambda-cyhalothrin, and thus the technical gamma-cyhalothrin product may be considered a refined form of cyhalothrin/lambda-cyhalothrin in that it has been purified by removal of less active and inactive isomers.