Quiroga-Cubides G, García-Riaño L, Grijalba-Bernal EP, Espinel C, Cuartas Otálora PE, Guevara EJ, Gómez-Álvarez MI, Cruz Barrera M. Assessment of a potential bioproduct for controlling Cerotoma arcuata tingomariana (Coleoptera: Chrysomelidae).
J Appl Microbiol 2022;
133:1063-1077. [PMID:
35598181 DOI:
10.1111/jam.15630]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/02/2022] [Accepted: 05/18/2022] [Indexed: 11/27/2022]
Abstract
AIMS
The leaf-feeding pest Cerotoma arcuata tingomariana (Bechyné) (Coleoptera: Chrysomelidae) produces huge economic losses in different crops. This study aimed to produce conidia by semisolid-state fermentation and to establish the insecticidal activity of two formulation prototypes based on a native Beauveria bassiana isolate for controlling this pest.
METHODS AND RESULTS
A novel fabric-based semisolid-state fermentation strategy for quick and large-scale conidia production was performed and characterized. Conidia were formulated as an emulsifiable concentrate (EC) and a water-dispersible granulate (WG). Afterwards, the mortality of C. a. tingomariana adults was assessed. A conidia concentration of 2.9 x109 conidia cm-2 was obtained after nine days-course fermentation and a yield of 33.4 g kg-1 dry-substrate.
CONCLUSIONS
The polyester fabric-based fermentation is an efficient technique for producing and collecting B. bassiana spores. Regarding LC90 , the potency analysis showed that the EC was 21-fold more potent than the non-formulated conidia, and ~2.6-fold more potent than the WG.
SIGNIFICANCE AND IMPACT OF STUDY
A high throughput fermentation based on polyester fabric as support for B. bassiana conidia production and subsequent formulation as an EC comprises a promising strategy for obtaining a bioproduct to control adults of C. a. tingomariana and other Chrysomelidae pests.
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