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Compatibility of the Entomopathogenic Fungus Metarhizium anisopliae (Ascomycota: Hypocreales) and the Predatory Coccinellid Menochilus sexmaculatus (Col.: Coccinellidae) for Controlling Aphis gossypii (Hem.: Aphididae)

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Abstract

Metarhizium anisopliae (Ascomycota: Hypocreales) is an entomopathogenic fungus considered a key factor in develo** integrated management of several insect pests on a variety of crops. The predatory coccinellid, Menochilus sexmaculatus (Col.: Coccinellidae), is also an important natural enemy that must be conserved for effective aphid control. Laboratory studies were conducted under controlled conditions to investigate the interaction between M. anisopliae isolate IRN. 1 and the coccinellid predator M. sexmaculatus in combating Aphis gossypii Glover (Hem.: Aphididae). The combined application of M. sexmaculatus and M. anisopliae led to significant reduction in aphid populations. The foraging behavior of M. sexmaculatus notably facilitated the dispersion of M. anisopliae conidia to uninfected plants, resulting 54 ± 1.3% decrease in aphid density after 10 days. In both choice and non-choice experiments, female adult M. sexmaculatus to fungus-infected aphids was offered as prey and avoided as a food source during all starvation periods. However, live and dead non-fungus-infected aphids were fed upon. The result revealed the compatibility between M. sexmaculatus and M. anisopliae, which may provide a sustainable strategy for the effective management of A. gossypii in a crop** system.

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Acknowledgements

The authors are grateful to the Department of Plant Protection, Vali-e-Asr University of Rafsanjan, Iran for financial support to H. Atrchian.

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The authors confirm contribution to the paper as follows: study conception and design: Haniieh Atrchian, Kamran Mahdian, and Hamzeh Izadi; data collection: H. Atrchian; analysis and interpretation of results: H. Atrchian, K. Mahdian; draft manuscript preparation: H. Atrchian. All authors reviewed the results and approved the final version of the manuscript.

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Correspondence to Kamran Mahdian.

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The article is original and none of the material has been published or is under consideration elsewhere, and the experiments involve arthropods cultured in accordance with institutional guidelines.

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The authors declare no competing interests.

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Edited by María F Cingolani

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Atrchian, H., Mahdian, K. & Izadi, H. Compatibility of the Entomopathogenic Fungus Metarhizium anisopliae (Ascomycota: Hypocreales) and the Predatory Coccinellid Menochilus sexmaculatus (Col.: Coccinellidae) for Controlling Aphis gossypii (Hem.: Aphididae). Neotrop Entomol (2024). https://doi.org/10.1007/s13744-024-01163-4

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