Clara Saved Her Heirloom Greenhouse With Three Simple Pantry Ingredients

a waxy layer. The acid disrupts that wax, making them vulnerable.”

“And the soap?”

“The Castile soap acts as a surfactant,” Frank said. “It breaks the surface tension of the water so the mixture sticks to their bodies instead of rolling off. The vegetable oil then suffocates them by clogging their spiracles, the tiny breathing pores along their sides.continue reading …