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Figure 1. Tunneling of apple fruit caused by larvae of the codling moth. Codling moth is the most important insect pest of apple and pears in North America. Damage is done by the larvae, which are cream-colored caterpillars that tunnel fruit and produce âwormyâ apples (Figure 1).
The peppered moth (Biston betularia) is a temperate species of night-flying moth. Peppered moth evolution is an example of population genetics and natural selection.n Britain and Ireland, the peppered moth is univoltine (i.e. , it has one generation per year), whilst in south-eastern North America it is bivoltine (two generations per year).