Deuteronomy 28:18, 38-40, 42

Your children and your crops will be cursed. The offspring of your herds and flocks will be cursed.

“You will plant much but harvest little, for locusts will eat your crops. You will plant vineyards and care for them, but you will not drink the wine or eat the grapes, for worms will destroy the vines. You will grow olive trees throughout your land, but you will never use the olive oil, for the fruit will drop before it ripens.

Swarms of insects will destroy your trees and crops.