From The Long Lost Friend:
To Prevent The Hessian Fly From Injuring The Wheat
Take pulverized charcoal, make ley of it, and soak the seed wheat in it; take it out of the ley, and on every bushel of wheat sprinkle a quart of urine; stir it well, then spread it out to dry.
The grimoire The Long Lost Friend lists this spell.
Timeline of related events
1820Publication of Hohmann's Long Lost Friend (lists this spell)