Symmetrischema

Povolný, 1967

Species Guides

Symmetrischema capsica(pepper flowerbud moth)
Symmetrischema fercularia
Symmetrischema lavernella
Symmetrischema lectulifera
Symmetrischema pallidochrella
Symmetrischema striatella(Streaked Twirler)
Symmetrischema tangolias(South American potato tuber moth)

Symmetrischema is a of gelechiid moths established by Povolný in 1967. The genus includes economically significant agricultural pests, most notably the Andean potato tuber moth (S. tangolias), which causes severe postharvest losses to stored potatoes in highland regions. Some exhibit specialized feeding strategies, including the ability to induce parthenocarpic fruit development in plants. The genus occurs across the Americas with at least one species introduced to Oceania.

Symmetrischema tangolias by (c) Grey Smith, some rights reserved (CC BY), uploaded by Grey Smith. Used under a CC-BY license.

Symmetrischema tangolias by (c) Saryu Mae 前朝琉, some rights reserved (CC BY), uploaded by Saryu Mae 前朝琉. Used under a CC-BY license.

Symmetrischema tangolias by (c) Aalbert Rebergen, some rights reserved (CC BY), uploaded by Aalbert Rebergen. Used under a CC-BY license.

Pronunciation

How to pronounce Symmetrischema: //sɪˌmɛ.trɪˈski.mə//

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Images

Distribution

Native to the Americas; S. tangolias distributed across Andean highlands of Peru, Ecuador, Bolivia, Chile, and Colombia, with introduced in North America (USA: California, Louisiana, Mississippi, Washington; Mexico), Asia (Indonesia), and Oceania (Australia: New South Wales, Tasmania, Victoria; New Zealand). S. lavernella occurs on Physalis in North America. S. dulce associated with chili pepper in Neotropical regions.

Human Relevance

S. tangolias (Andean potato tuber moth) is a major pest of global agricultural importance, causing severe postharvest losses in potato storage systems and threatening food security in Andean smallholder farming systems. Larval tunneling in tubers facilitates secondary , leading to complete loss of commercial value. S. dulce causes significant yield losses in chili pepper production.

Similar Taxa

Phthorimaea operculellaAlso a potato tuber moth in Gelechiidae; S. tangolias is more cold-adapted with optimal development at 17-21°C versus 25-30°C for P. operculella, allowing S. tangolias to dominate in cooler highland regions.
Tecia solanivoraAnother gelechiid potato pest; distinguished by geographic distribution and morphological features of larvae and .