In vitro compatibility of fungicides with Metarhizium rileyi in soybean disease management

Elisângela de Souza Loureiro; Gilson Bárbaro Barbosa Junior; Pamella Mingotti Dias; Luis Gustavo Amorim Pessoa; Andressa Silva Rodrigues; Maurício Sekiguchi de Godoy; Natalia Elizabeth Soto Mesa; Gabriella Silva de Gregori

doi:10.1590/1983-21252025v3812752rc

Authors

Elisângela de Souza Loureiro https://orcid.org/0000-0002-9708-3775
Gilson Bárbaro Barbosa Junior https://orcid.org/0009-0001-5792-0540
Pamella Mingotti Dias https://orcid.org/0000-0002-0963-9455
Luis Gustavo Amorim Pessoa https://orcid.org/0000-0003-4646-062X
Andressa Silva Rodrigues https://orcid.org/0000-0001-5602-1474
Maurício Sekiguchi de Godoy https://orcid.org/0000-0002-3842-340X
Natalia Elizabeth Soto Mesa https://orcid.org/0000-0001-5283-1381
Gabriella Silva de Gregori https://orcid.org/0009-0003-8577-0986

DOI:

https://doi.org/10.1590/1983-21252025v3812752rc

Keywords:

Glycine max. Lepidoptera. Biological control. Entomopathogenic fungi. Selectivity.

Abstract

Compatibility between chemical fungicides and biological insecticides is essential for maintaining plant health and preserving entomopathogenic fungi that induce epizootics in arthropod pests in soybean crops. The objective of this study was to evaluate the effects of the fungicides Fox Xpro^®, Sphere Max^®, Orkestra^®, Elatus^®, Vessarya^®, and the adjuvant Aureo^® on the in vitro development of the entomopathogenic fungus Metarhizium rileyi (strain UFMS 03). The effects of these products on vegetative growth (cm), conidial production, and germination (%) of M. rileyi were assessed. The obtained data were used to calculate the compatibility factor based on the biological index. The fungicide Elatus^® and the adjuvant Aureo^® were compatible with M. rileyi, showing no adverse effects on its vegetative growth. The fungicide Orkestra^® was moderately toxic to M. rileyi, negatively affecting its vegetative growth and sporulation. The fungicides Fox Xpro^®, Sphere Max^®, and Vessarya^® were toxic to M. rileyi, reducing its vegetative growth and sporulation. Although all products reduced M. rileyi sporulation, Elatus^® and Aureo^® were compatible with M. rileyi and can be integrated into disease management strategies aimed at conserving this biological control agent.

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References

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