Potato moth (three-spotted)

Systematic position: Ephysteris trinota belongs to the order Lepidoptera, family Gelechiidae (twirler moths). This species is recognized as a significant agricultural pest that targets specific plant families, causing severe stress to crop development.

Affected crops: The primary host plant for Ephysteris trinota is the potato. It poses a threat both to the aerial parts of the plant during the growing season and to the tubers while they are in storage, often leading to total loss of marketability.

Biology and lifecycle: The insect undergoes complete metamorphosis, consisting of the egg, larva, pupa, and adult stages. The moths are typically nocturnal and active during warm seasons. Females lay eggs on plant tissues, and the emerging larvae immediately begin feeding, penetrating the leaves or the surface of the potato tubers.

Damage character and harmfulness:

• Larvae create tunnels (mines) in leaves, reducing photosynthesis.
• Stem boring results in wilting and plant death.
• Tubers show visible damage channels filled with frass.
• Secondary infections such as fungal rots often accompany larval damage.
• Significant economic losses occur both in the field and in post-harvest storage facilities.

Control measures: Integrated pest management (IPM) is essential for controlling this moth. Cultural practices such as deep tillage, hilling of potato rows, and the destruction of crop residues are fundamental. Chemical control using selective insecticides is applied during the peak flight of adults. For stored crops, maintaining a low-temperature environment is crucial to halt the development of larvae and prevent infestation spread.