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[1 Mar 2010 | No Comment | ]

Many insects spend a part of their life underground and are exposed to the risk of fungal or bacterial infections. This is also the case for many digger wasp species that construct underground nests. Unlike bees that use pollen and nectar as food to nurture their larvae, digger wasps hunt insects to feed their offspring. Because of the warm and humid conditions as well as the large amounts of organic material in their subterranean nest, both their food supply and their larvae are endangered by pathogens. Mold and bacterial infection are a major threat and can cause larval death in many cases.