Sweet potato stem borer
Common NameSweet potato stem borer
Scientific NameOmphisa anastomosalis
FamilyCrambidae
SubfamilySpilomelinae
Wingspan (mm)28
Wing Patterncryptic
Primary Colorsbrown, dark brown, pale olive-green
HabitatAgricultural fields (sweet potato farms), gardens, tropical and subtropical environments
Geographic RangeSoutheast Asia, Oceania, parts of Australia
Host PlantsIpomoea batatas, Ipomoea aquatica
Flight PeriodYear-round (multiple generations in tropical regions)
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesThe larvae are borers, feeding inside the stems and vines of sweet potato plants, causing wilting and reduced yield. Pupation occurs within the plant stem or in the soil.
Identification TipsLook for the distinctive reticulated wing pattern with pale olive-greenish areas and darker brown markings, especially the prominent dark discal spot on the forewing. Its presence near sweet potato plants is a strong indicator.
Description
A medium-sized moth with mottled brown and pale olive-green wings, featuring a distinct reticulated pattern across both forewings and hindwings. The body is robust and matches the overall cryptic coloration.
