These older bread wheat (Triticum aestivum) materials are thought to be tolerant or resistant to wire worm damage.

Wireworms are the larvae of click beetles, of which there are many species. The adult beetles lay eggs in the soil, usually in the spring, and the larvae may take several years to develop prior to pupating, depending on species. Generations overlap so that all stages and sizes of larvae may be found in the soil at the same time.

Many species of wireworms are found throughout the world, all of which can attack wheat. These larvae are capable of attacking many different plant species as well. Wireworms are among the most damaging soil-infesting insects. Damage is usually most severe where wheat has been seeded after fallow or after a number of years of grass.

Source: CIMMYT Wheat Germplasm Collection