Toxic metabolites of fungal biocontrol agents.

Vey, A.; Hoagland, Robert E.; Butt, Tariq M.; Jackson, C.; Magan, Naresh

doi:10.1079/9780851993560.0311

Cited by 215 publications

(158 citation statements)

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“…The insecticidal metabolites produced by fungi have several modes of action and in many cases are often the direct cause of insect death, acting in the specialized cells of the immune system to avoid attacking invasive fungal structures (TÉLLEZ-JURADO et al, 2009). Toxin production is a characteristic of most species of entomopathogenic fungi (VEY et al, 2001). Among the toxins produced by M. anisopliae, the destruxins are the most studied ones, for their mode of action, which involves inhibiting the synthesis of DNA, RNA, and proteins in insect cells (PUCHETA et al, 2006).…”

Section: Hemocoel Replicationmentioning

confidence: 99%

Classification and infection mechanism of entomopathogenic fungi

2018

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RESUMO:Os fungos entomopatogênicos são importantes agentes de controle biológico em todo o mundo e têm sido objeto de intensa pesquisa por mais de 100 anos, infectando artrópodes na natureza e podendo ocorrer em níveis enzoóticos ou epizoóticos em suas populações de hospedeiros. O seu mecanismo de infecção envolve a fixação do esporo à cutícula do inseto, seguido da germinação, penetração da cutícula e disseminação interna no inseto. As linhagens dos fungos entomopatogênicos estão concentradas nas ordens: Hypocreales (vários gêneros), Onygenales (gênero Ascosphaera), Entomophthorales e Neozygitales (Entomophthoromycota). PALAVRAS-CHAVE: taxonomia; toxinas; enzimas; hospedeiros.ABSTRACT: Entomopathogenic fungi are important biological control agents throughout the world, have been the subject of intensive research for more than 100 years, and can occur at epizootic or enzootic levels in their host populations. Their mode of action against insects involves attaching a spore to the insect cuticle, followed by germination, penetration of the cuticle, and dissemination inside the insect. Strains of entomopathogenic fungi are concentrated in the following orders: Hypocreales (various genera), Onygenales (Ascosphaera genus), Entomophthorales, and Neozygitales (Entomophthoromycota).

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Section: Hemocoel Replicationmentioning

confidence: 99%

Classification and infection mechanism of entomopathogenic fungi

2018

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“…Most of the Trichoderma strains produce volatile and onvolatile toxic metabolites that obstruct colonization by antagonistic microorganisms. Some of these metabolites were harzianic acid, alamethicins, tricholin, peptaibols, 6-penthyl-alpha-pyrone, massoilactone, viridin, gliovirin, glisoprenins, and heptelidic acid (Vey et al, 2001). …”

Section: Faruk and Rahmanmentioning

confidence: 99%

Management of cauliflower seedling disease (Sclerotium rolfsii) in seedbed with different substrate based Trichoderma harzianum Bio-fungicides

Faruk

Rahman

2018

Bangladesh J. Agric. Res

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Efficacy of rice bran, wheat bran, grass pea bran and their combinations with or without mustard oilcake (MOC) were tested as substrate of Trichoderma harzianum based bio-fungicides for the management of foot and root rot disease of cauliflower caused by Sclerotium rolfsii in the seedbed during three consecutive growing seasons from 2011 through 2014 in the net house of Bangladesh Agricultural Research Institute, Gazipur. The seedbed soil was inoculated with pathogen S. rolfsii colonized on barley grain before treatment with T. harzianum based bio-fungicides. The results of three years trial revealed that T. harzianum based bio-fungicides effectively reduced pre-emergence and post-emergence mortality of cauliflower seedling in seedbed. Besides, vegetative growth of cauliflower seedlings viz. shoot length, shoot weight, root length and root weight were enhanced significantly by different substrates based T. harzianum bio-fungicides in S. rolfsii sick seedbed. The substrates rice bran, wheat bran, grass pea bran and their combination with mustard oilcake (MOC) were equally suitable for effective formulation of T. harzianum bio-fungicides against foot and root rot disease of cauliflower in seedbed.

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“…Based on the results obtained, the supernatant did not show insecticidal activity nor larval mortality. According Vey et al [18], mycotoxin from entomopathogenic fungi showing insecticidal effects are mostly proteins or peptides cyclic. Moreover, according to Quesada-Moraga and Vey [19], purified mycotoxin from entomopathogenic fungi resulted in protein macromolecules with insecticidal activity.…”

Section: Extraction Toxicity Assay and Determination Of Lethal Concementioning

confidence: 99%

“…Many researchers have worked on the activity study of insecticidal entomopathogenic fungi and found diverse compounds, among others: Beauvericin -MW 28 kDa [24], destruxins -MW 22 kDa) [25], bassianin -MW 18 kDa; bassianolide -MW 390 kDa; beauverolides -MW 72 kDa [18], tenellin -MW 60 kDa [26], and oosporein -MW 83 kDa [27]. There are still other mycotoxin from entomopathogenic fungi that has not been identified by name as researched by Meng et al [28], with a size of about 50 kDa derived from Beauveria sp.…”

Section: Determination Of Protein Molecular Weight By Sds Pagementioning

confidence: 99%

Extraction and Toxicity Assay of Mycotoxin from Entomopathogenic Fungi Isolate of Kusuma Agrowisata Orchard Batu, Jawa Timur, Indonesia

Janli

Purwanto²,

Artadana³

et al. 2017

KLS

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Insect pest control has been a major problem faced by farmers around the world and there has been no perfect solution to handle it. The use of insecticides derived from chemically active compounds has made negative impacts such as the emergence of resistant pest and disruption of ecosystems. In addition, it raised many other negative impacts on the environment and on non-target organisms. Therefore, an alternative is needed to replace chemical insecticides. Entomopathogenic fungus is one of the potential biological control organism to suppress the growth of insect pests. This study aims to extract mycotoxin from entomopathogenic fungi isolated from the apple orchard at Batu, East Java, Indonesia and determine the level of toxicity against Tenebrio molitor larvae. Mycotoxin was extracted using precipitation with ammonium sulphate and dialysis. It was subjected to molecular weight analysis and toxicity test to determine the LC50 value. Results showed that protein bands were found between 20 kDa to 55 kDa. Based on the study, the mycotoxin showed a LC50 at a concentration of 42.78 μg · mL −1 .

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Toxic metabolites of fungal biocontrol agents.

Cited by 215 publications

References 0 publications

Classification and infection mechanism of entomopathogenic fungi

Classification and infection mechanism of entomopathogenic fungi

Management of cauliflower seedling disease (Sclerotium rolfsii) in seedbed with different substrate based Trichoderma harzianum Bio-fungicides

Extraction and Toxicity Assay of Mycotoxin from Entomopathogenic Fungi Isolate of Kusuma Agrowisata Orchard Batu, Jawa Timur, Indonesia

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