[Tilted Irish Kilt]

Red_Devil 232:" Yes on the ground. Or you can get hand held spreaders that will puff it out like a cloud of dust
and spread it on leaves to take care of aphids and other leaf munchers and such."

Diotamacious Earth (DE) is one of the easiest pesticides to use under leaves where most people don't bother to look for pest infestation.
Best application is in a duster, as it can reach under leaves , and whatever falls to the ground will continue to protect plants on the soil surface.
It is a "two-fer, freebie ".

[ApplegateRanch]

>>Diotamacious Earth (DE) is one of the easiest pesticides to use under leaves where most people don’t bother to look for pest infestation.<<

One of the first places I look for orange egg clusters is almost always underneath potato leaves. Getting rid of those can eliminate a problem before it starts, as well as alerting one to BOLO for other stages.

Always gratifies me to get a pair of potato beetles in the act of procreation. We have a pervasive native alternative host for them, so they can’t be eliminated completely.