Are there any examples of animals killing other animals for indirect sources of food?

Question

Humans kill slugs because they detroy crops, or foxes because they kill sheep prematurely. Are there any examples where animals do the same? Kill other animals, and don't eat them, only to protect their own supply of food (not just plantation type, can be mammals or insects etc.)? If so, is it a fundmental type of farming/agriculture? Cheers.

Answer 1

Not sure if this is an answer but leaf cutter ants cut leaves and then use them to grow fungus which is their food source deep in their nests.  This is definately farming

An other ants milk aphids for some nutrient while ladybugs kill them.  Maybe the ants would kill the ladybugs?