How to Manage Pests
Pests in Gardens and Landscapes
Potato tuberworm—Phthorimaea operculella
Potato tuberworm larvae are dull white to pinkish and do not grow longer than 0.5 inch. They have dark
heads. They are found tunneling in tubers, stems, fruit, or leaves.
Identification of species | Life
In tomatoes, tuberworms burrow into fruit and into terminal stems, causing them to die. In potatoes,
they tunnel into tubers, stalks, and leaves. Tuber eyes turn pink with excrement and silk.
Damage to tomatoes, eggplant, or peppers can be avoided by not planting these crops near infested potato
crops or following a potato crop in a garden. In potatoes, keep plants deeply hilled with soil when planting.
Don't allow soil to crack. Sprinkler irrigation will help keep soil surface sealed. Harvest potatoes promptly.
Destroy infested tubers or store them at temperatures below 52° F to prevent tuberworm development.
damage in potatoes