Examinando por Materia "Symmetrischema tangolias"

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Effectiveness of Repellent Plants for Controlling Potato Tuber Moth (Symmetrischema tangolias) in the Andean Highlands
(MDPI, 2025-12-24) Villanueva Spelucín, Alex; Escobal Valencia, Fernando; Cabrera Hoyos, Héctor Antonio; Cántaro Segura, Héctor Baroni; Diaz Morales, Luis Alberto; Matsusaka Quiliano, Daniel Claudio
Postharvest losses from potato tuber moth severely constrain seed quality in Andean smallholder systems. This study evaluated four locally available repellent plants—Ambrosia peruviana, Eucalyptus globulus, Artemisia absinthium, and Minthostachys mollis—applied as dried leaves layered within seed bags of INIA 302 'Amarilis' under farmer-like storage at two highland sites in Cajamarca, Peru (Huaytorco, 3350 m; Samaday, 2750 m), over 187 days. Within each site, a Completely Randomized Design with three bag-level replicates per treatment was used, and damage was assessed after 187 days as incidence of attacked tubers, internal damage severity and live larval counts. Endpoint data were analyzed separately by site using Kruskal–Wallis tests followed by Dunn's post hoc test with Šidák correction (α = 0.05). Across both sites, all botanicals significantly reduced damage severity and live larval counts relative to the untreated control. At the warmer, lower site, A. absinthium and M. verticillata achieved large effect sizes, with severity and larval numbers reduced by roughly 80–90% compared with the control, while at the cooler, higher site, larvae were not detected in any botanical treatment. These findings indicate that simple layering of dried leaves from locally available plants, particularly wormwood and muña, can substantially mitigate S. tangolias damage in highland seed potato stores and represents a promising, low-cost complement to integrated pest management, although multi-season and dose-response studies are still needed to confirm and refine this approach.
Labores culturales para el control de la polilla de la papa: Symmetrischema tangolias (Gyen); Phthorimaea operculella (Zeller)
(Plantwise, 2018-03-08) Cervantes Peralta, Marieta Eliana; Escobal Valencia, Fernando
Hojas volantes para agricultores “Labores culturales para el Control de la polilla de la papa: Symmetrischema tangolias (Gyen); Phthorimaea operculella (Zeller)”, las recomendaciones son relevantes a Perú
Polilla de la Papa: Tuta absoluta; Phthorimaea operculella; Symmetrischema tangolias
(Plantwise, 2016-06-23) De la Riva Aragón, Nicanor Marcial
Hojas volantes para agricultores “Polilla de la Papa: Tuta absoluta; Phthorimaea operculella; Symmetrischema tangolias.”, las recomendaciones son relevantes a Perú
Sustainable Management of Potato Tuber Moths Using Eco-Friendly Dust Formulations During Storage in the Andean Highlands
(MDPI, 2026-01-13) Villanueva Spelucín, Alex; Escobal Valencia, Fernando; Cántaro Segura, Héctor Baroni; Diaz Morales, Luis Alberto; Matsusaka Quiliano, Daniel Claudio
Postharvest losses caused by potato tuber moths severely impact storage in the Andean highlands, where reliance on synthetic insecticides poses sustainability and safety concerns. This study evaluated eco-friendly alternatives for protecting stored seed tubers of the widely adopted cultivar INIA 302 Amarilis in Cajamarca, Peru. In two storage facilities, a completely randomized block design compared four treatments: Bacillus thuringiensis plus talc (Bt-talc), talc, agricultural lime, and wood ash against an untreated control. Powders were applied at 50 g per 10 kg of tubers, and incidence, severity of damage, and live larvae were assessed over 150 days. Bt–talc consistently achieved the lowest damage. Incidence in Cochapampa was 16.8% ± 6.2 with Bt-talc, compared with 58.1% ± 3.9 in the control; in Sulluscocha, incidence was 25.5% ± 4.8 and 64.2% ± 3.0 for Bt-talc and the control, respectively. A similar pattern was observed for moth-damage severity in both localities. Live larvae per unit were also markedly lower with 1.3 ± 0.3 (Cochapampa) and 1.6 ± 0.6 (Sulluscocha) under Bt–talc. A single dusting with Bt–talc, or alternatively agricultural lime, offers effective, accessible, and sustainable control of potato tuber moths in high-Andean storage.