Banana scab moth

Definition

A small crambid moth (Lepidoptera: Crambidae), Nacoleia octasema, whose larvae tunnel under the epidermis of banana fingers and other Musa fruits, leaving raised, corky scab lesions that downgrade fruit quality and marketability. The species is distributed across the southwestern Pacific and northern Australia.

Etymology

From the host plant (banana) and the characteristic corky scarring (scab) caused by larval feeding; the scientific name Nacoleia octasema derives from Greek roots referring to the wing venation pattern.

Example

In Queensland banana plantations, heavy infestations of banana scab moth can render entire bunches unmarketable; monitoring typically involves checking for oviposition scars on developing fruit and applying targeted insecticides during the susceptible finger elongation stage.

Synonyms

• Nacoleia octasema

Related Terms

• Crambidae
• fruit borer
• false codling moth
• Banana skipper
• Musa
• oviposition scar
• Integrated Pest Management

Usage Notes

Common name used primarily in Australasian and Pacific agricultural contexts; not to be confused with banana moth (Opogona sacchari), a tineid pest of banana pseudostems and stored fruit. The species is sometimes referenced in older literature under misspellings of the genus (e.g., Nacolea).