Whitefly Control for Cannabis: Sticky Traps, Biocontrols & Timing

Whiteflies cluster on leaf undersides and tank your canopy fast — yellow sticky traps at canopy height and Encarsia formosa wasps introduced preventively are your best moves before populations explode. Spinosad and insecticidal soaps hold it down during veg, but don't wait until you've got a full infestation.