Search citation statements
Paper Sections
Citation Types
Year Published
Publication Types
Relationship
Authors
Journals
This study evaluated the potential of four formulations of the entomopathogenic fungus Beauveria bassiana for the control of Thaumastocoris peregrinus. For this, the leaves of Eucalyptus dunni were immersed in each delivery of B. bassiana, isolated IBCB 66, and also in sterile distilled water containing Tween 80® (0.01%) (control), totaling five treatments, with five repetitions each. These leaves were placed in germination boxes containing 10 insects in each and, subsequently, kept in an air-conditioned room (27 ± 2 ° C, 60 ± 10% RH, and 12-h photophase). Record longevity for seven days. The experiment was carried out with adults and also with 3rd instar nymphs of T. peregrinus. These formulations were tested for resistance induction, using organic soybean seeds (standard) sown in sand. Ten days after emergence, 40 µL of treatment suspension was competent in 2 mm cuts made on the top of the cotyledon. Phytoalexins and phenylalanine ammonia lyase (PAL) were determined. All formulations caused a reduction in the longevity of T. peregrinus when compared to the control, standing out as formulations T1 and T2, both for adults and for 3rd instar nymphs of T. peregrinus. The T2 expansion also promotes an increase in the production of phytoalexins and PAL. Thus, the IBCB 66 isolate from B. bassiana, supplied T1, has the potential to control nymphs and adults of T. peregrinus and is also a potential resistance inducer.
This study evaluated the potential of four formulations of the entomopathogenic fungus Beauveria bassiana for the control of Thaumastocoris peregrinus. For this, the leaves of Eucalyptus dunni were immersed in each delivery of B. bassiana, isolated IBCB 66, and also in sterile distilled water containing Tween 80® (0.01%) (control), totaling five treatments, with five repetitions each. These leaves were placed in germination boxes containing 10 insects in each and, subsequently, kept in an air-conditioned room (27 ± 2 ° C, 60 ± 10% RH, and 12-h photophase). Record longevity for seven days. The experiment was carried out with adults and also with 3rd instar nymphs of T. peregrinus. These formulations were tested for resistance induction, using organic soybean seeds (standard) sown in sand. Ten days after emergence, 40 µL of treatment suspension was competent in 2 mm cuts made on the top of the cotyledon. Phytoalexins and phenylalanine ammonia lyase (PAL) were determined. All formulations caused a reduction in the longevity of T. peregrinus when compared to the control, standing out as formulations T1 and T2, both for adults and for 3rd instar nymphs of T. peregrinus. The T2 expansion also promotes an increase in the production of phytoalexins and PAL. Thus, the IBCB 66 isolate from B. bassiana, supplied T1, has the potential to control nymphs and adults of T. peregrinus and is also a potential resistance inducer.
This study analyzed the antifungal potential of 16 bacterial strains isolated from mangrove sediment. Bacterial selection was conducted in a solid medium. This was followed by the production and extraction of metabolites using ethyl acetate to evaluate chitinase production, antifungal activity, and toxicity toward Allium cepa and Tenebrio molitor. Bacterial strains B8, B11, and B13 produced the largest inhibition halos (>30 mm) toward Fusarium solani, Fusarium oxysporum, and Rhizoctonia solani fungi. Strains B1, B3, B6, B8, B11, B13, B14, and B16 produced chitinases. In assays using liquid media, B8 and B13 produced the largest inhibition halos. Exposing the fungal inocula to metabolic extracts of strains B6, B8, B11, B13, B14, B15, and B16 caused micromorphological alterations in the inocula, culminating in the inhibition of R. solani sporulation and spore germination. Toxicity tests using Allium cepa and Tenebrio molitor revealed that the metabolites showed low toxicity. Six of the bacterial strains were molecularly identified to species levels, and a further two to genus level. These included Serratia marcescens (B8), which exhibited activity in all tests. Mangroves provide a useful resource for the isolation of microorganisms for biocontrol. Among the isolates, Serratia marcescens and Bacillus spp. showed the greatest potential to produce metabolites for use as biocontrol agents in agriculture.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
334 Leonard St
Brooklyn, NY 11211
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.