Treat the infestation with diazinon granules applied to furrow at planting. However, permissible chemical uses are always changing so carefully read the label before using any chemical. The maggot stage of the leafminer may be observed burrowing in leaves, producing blotchy mines. Although conspicuous, the injury usually has little effect on the growing root. Problems often can be managed by picking infested leaves or crushing the eggs and larvae during plant inspections.
Flea beetles feed on leaves of many root Crops, chewing small pits or holes.
Young seedlings can be killed or stunted by this injury, although established plants suffer little negative effects. Planting conditions that favor rapid seedling growth often avoid significant flea beetle injury. Seeding at higher rates also dilutes flea beetle attacks. The more vigorous, surviving plants can be left after thinning. The most important pest problem associated with carrots is aster yellows .