ArticleScientific reports2026
Behavioral and lethal effects of yeast based bioformulations on Bactrocera dorsalis.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Oriental fruit fly, Bactrocera dorsalis (Diptera: Tephritidae), is a globally significant agricultural pest necessitating novel and sustainable management strategies. This study investigated the efficacy of two stable bio-control agents derived from the naturally associated mycobiome of Zaprionus indianus: the yeast species Debaryomyces hansenii ziha1 and Pichia kudriavzevii zibd3, formulated with Essential Oil of Citral (EOC). Efficacy was evaluated via stability testing across 7 °C, 25 °C and 35 °C, compatibility assessment (T-factor), behavioral preference assays, insecticidal trials against first-instar larvae, and chemical characterization using GC-MS and Y-tube olfactometry. Both EOC-based formulations demonstrated high stability and acceptable compatibility with the fungi (EOC ≤ 1%, T ≈ 55), but exhibited strikingly opposite behavioral effects on adult B. dorsalis. D. hansenii-EOC showed significant attractant activity (- 95 ± 0.5%), which was correlated with VOCs such as Acetophenone and Hexadecenal, while P. kudriavzevii-EOC acted as a potent repellent (100 ± 0.5%), attributed to compounds including p-Mentha1,5-dien-8-ol and Naphthalene. Furthermore, P. kudriavzevii-EOC exhibited a synergistic lethal effect against pre-adult stages, causing over 50% larval mortality. In conclusion, the insect mycobiome serves as a rich and selective source for chemical ecology-based pest management, offering stable, dual-action bio-formulations (Attractant and Repellent/Larvicide) that are ideal for developing targeted "Push-Pull" or "Attract-and-Kill" strategies in B. dorsalis integrated pest management (IPM) programs.
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