<i>In vitro</i> screening of biocontrol and biodegradation potential of selected hymenomycetes against <i>Ganoderma boninense</i> and infected oil palm waste

Naidu, Yuvarani; Idris, Abu Seman; Nusaibah, S. A.; Norman, K.; Siddiqui, Yasmeen

doi:10.1111/efp.12197

Cited by 23 publications

(14 citation statements)

References 37 publications

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“…Agar solution (2.5%) was sterilized and cooled (44 • C) to prepare agar discs. Homogenized bacterial cultures were mixed with molten agar and poured into Petri dishes aseptically inside a laminar airflow [33,34]. Agar discs of equal size were prepared with a cork borer.…”

Section: Agar Discsmentioning

confidence: 99%

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

et al. 2020

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Cypermethrin is popularly used as an insecticide in households and agricultural fields, resulting in serious environmental contamination. Rapid and effective techniques that minimize or remove insecticidal residues from the environment are urgently required. However, the currently available cypermethrin-degrading bacterial strains are suboptimal. We aimed to characterize the kinetics and metabolic pathway of highly efficient cypermethrin-degrading Bacillus thuringiensis strain SG4. Strain SG4 effectively degraded cypermethrin under different conditions. The maximum degradation was observed at 32 °C, pH 7.0, and a shaking speed of 110 rpm, and about 80% of the initial dose of cypermethrin (50 mg·L−1) was degraded in minimal salt medium within 15 days. SG4 cells immobilized with sodium alginate provided a higher degradation rate (85.0%) and lower half-life (t1/2) of 5.3 days compared to the 52.9 days of the control. Bioaugmentation of cypermethrin-contaminated soil slurry with strain SG4 significantly enhanced its biodegradation (83.3%). Analysis of the degradation products led to identification of nine metabolites of cypermethrin, which revealed that cypermethrin could be degraded first by cleavage of its ester bond, followed by degradation of the benzene ring, and subsequent metabolism. A new degradation pathway for cypermethrin was proposed based on analysis of the metabolites. We investigated the active role of B. thuringiensis strain SG4 in cypermethrin degradation under various conditions that could be applied in large-scale pollutant treatment.

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Section: Agar Discsmentioning

confidence: 99%

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

et al. 2020

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“…During replanting, especially in BSR-infected blocks, the previous infected oil palm stand should be deboled, with the roots and trunk chipped to small pieces to facilitate decomposition. Naidu et al (2015) assessed the antagonistic and enzymatic activities of non-pathogenic hymenomycetes naturally occurring on the oil palm trunk, to determine their potential as degradation agents, as well as antagonistic properties against G. boninense. There were three fungi identified with high antagonistic activity against G. boninense: Pycnoporus sanguineus, Trametes lactinea and Grammothele fuligo.…”

Section: Biodegradation Of Oil Palm Trunkmentioning

confidence: 99%

Prospects in Sustainable Control of Oil Palm Pests and Diseases Through the Enhancement of Ecosystem Services – The Way Forward

Kamarudin¹

2019

JOPR

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The oil palm environment in Malaysia is rich in many ecosystem services which can be beneficial to control pests and diseases. Some examples are the soil microbes which consist of entomopathogenic fungi and bacteria which can be exploited for insect control, especially bagworms, rhinoceros beetle and termites. The bagworms (Lepidoptera: Psychidae) are currently severely infesting oil palm plantations in Malaysia. The Integrated Pest Management (IPM) of bagworms includes aerial spraying of Bacillus thuringiensis (Bt), cultivation of beneficial plants and fixing of natural pheromone traps. The rhinoceros beetle (Coleoptera: Scarabaeidae), can be managed with the soil fungus Metarhizium and the Oryctes nudivirus (OrNV). The subterranean termite (Isoptera: Rhinotermitidae) can be controlled with two entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae which perform similarly as an insecticide. The soil microflora, rich in soil antagonists, can be useful for the control of Ganoderma disease. The Integrated Ganoderma Management (IGM) approach is advocated, which aimed at minimising disease incidence in replanting and prolonging the productive life of the infected palm. Birds are also examples of ecosystem services which can be further exploited for the control of rodents and also insect pests. There are several endemic nocturnal and diurnal bird species inhabiting the oil palm plantation which have the potential to control pests, especially rats and bagworms. This article deliberates on some of the endemic ecosystem services in Malaysia which have been exploited towards the management of major pests and diseases in oil palm. The enhancement of existing and introduced ecosystem services would ensure better management of pests and diseases for the sustainable cultivation of oil palm.

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“…However, studies involving biological control of wood decay fungi and pests in forest areas are scarce (Castrillo et al, 2016;Naidu et al, 2015;Schwarze et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Granulobasidium vellereum (Ellis &Cragin) Jülich, a promising biological control agent

et al. 2018

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Studies involving biological control of wood decay fungi and pests in forest areas are scarce. The basidiomycete Granulobasidium vellereum (Ellis & Cragin) Jülich has been isolated as wood endophyte from London Plane trees (Platanus acerifolia (Ait.) Willd). This basidiomycete produces a variety of sesquiterpenes with antifungal activity. In this study we evaluated the potential activity of G. vellereum against wood decay fungi and fungi associated with the ambrosia beetle Megaplatypus mutatus Chapuis, an important forest pest in Populus sp. A combination of in vitro assays was made, in cultures and on wood blocks. Granulobasidium vellereum's Volatile Organic Compounds (FVOCs) were characterized and their potential role in biocontrol was assessed. Granulobasidium vellereum did not cause a significant loss of weight on P. acerifolia and Populus wood and inhibited the growth of the target fungi, mainly when inoculated first. Up to nineteen volatile compounds were determined in G. vellereum strains. The growth of all target fungi was inhibited by FVOCs and in some cases the morphology of the fungi was altered. These results indicate that G. vellereum can be used as a Biological Control Agent (BCA) of xylophagous fungi and fungi related to forest pests. Further investigations should focus on developing application strategies for M. mutatus management.

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In vitro screening of biocontrol and biodegradation potential of selected hymenomycetes against Ganoderma boninense and infected oil palm waste

Cited by 23 publications

References 37 publications

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

Prospects in Sustainable Control of Oil Palm Pests and Diseases Through the Enhancement of Ecosystem Services – The Way Forward

Granulobasidium vellereum (Ellis &Cragin) Jülich, a promising biological control agent

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