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September 15, 2026Black Sea Journal of Agriculture

Determination of the Persistence of Some Entomopathogenic Fungi and Wettable Powder Formulations on Concrete Surfaces against Major Stored Product Pests

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Authors

CBCebrail BARIŞ

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Overview

Experimental study reveals extended persistence of fungal wettable powder formulations on concrete against stored-product pests, indicating viable biological control options for grain storage.

Key Points

  • Evaluate the efficacy and persistence of Beauveria bassiana and Metarhizium robertsii, alongside their wettable powder formulations, applied to concrete surfaces against major stored-product insect pests over 90 days.
  • Treated concrete surfaces with B. bassiana (5-4), M. robertsii (S3), or wettable powder formulations (WP1 and WP2) at a concentration of 9×10¹⁰ conidia/m².
  • Exposed adult Rhyzopertha dominica, adult Sitophilus oryzae, and third-instar Plodia interpunctella larvae to the treated surfaces at 0, 30, 60, and 90 days under controlled conditions (25±2 °C, 65±5% RH, darkness).
  • Formulated fungal wettable powders retained insecticidal activity significantly longer than unformulated conidia, with WP1 and WP2 maintaining significant mortality against P. interpunctella and R. dominica after 30 days of surface aging.
  • WP1 exhibited the highest overall efficacy and persistence, maintaining insecticidal activity for up to 60 days, whereas mortality in S. oryzae remained low across treatments and decreased markedly after 30 days.

Cite This Study

Cebrail BARIŞ (2026) studied this question.

synapsesocial.com/papers/6aa913609013453be30a1327https://doi.org/10.47115/bsagriculture.1974767
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