Columbine leaf miner causes wiggly lines (serpentine) trails through leaves that are initially whitish andturn tan later in the season.
Eggs are laid on leaves in spring. Larvae tunnel into leaves and feed on the mesophyll tissue. More than one insect can occur in each leaf. There are several generations per year. Over winters as pupae in the soil.
Insecticides may help but they are not necessary since this insect is not fatal to the plant. It causes mostly an aesthetic problem.
