Impact of moisture and UV degradation on Beauveria bassiana (Balsamo) Vuillemin conidial viability in turfgrass

Thompson, Sarah R.; Brandenburg, Rick; Arends, Jim J.

doi:10.1016/j.biocontrol.2006.08.004

Cited by 39 publications

(19 citation statements)

References 23 publications

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“…The effect of sunlight on persistence can be affected by location of the spores (abaxial vs. adaxial leaf surfaces) (Jaronski, unpublished data), formulation (Alves et al 1998;Edgington et al 2000;Cohen and Joseph 2009;Thompson et al 2006), and fungal species or strain (Ignoffo and Garcia 1992;Fargues et al 1996;Fernandes et al 2007). With regards to the last aspect, conidia of I. fumosorosea were the most susceptible, while M. acridum were the most resistant to UV irradiation followed by B. bassiana and M. anisopliae .…”

Section: Sunlightmentioning

confidence: 97%

Ecological factors in the inundative use of fungal entomopathogens

2009

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Fungal entomopathogens have been developed in numerous countries as biocontrol agents with more than 100 mycoinsecticide products commercially available in 2006. The chief, perhaps sole, use of these mycoinsecticides has been as inundative agents, within a chemical paradigm. Large numbers of propagules are applied in an attempt to overwhelm by brute force many of the factors that keep a pathogen in nonepizootic equilibrium with its host. This review attempts to summarize what we know about the abiotic and biotic factors that affect the efficacy of these mycoinsecticides in both foliar and soil applications. Sunlight, humidity, temperature, and phylloplane-associated factors can affect both immediate efficacy and persistence on plants. Likewise, soil texture-moisture interactions, temperature, and a host of biotic factors can affect mycoinsecticides in the soil. Despite much research, our understanding of these ecological aspects is imperfect, especially in a holistic, dynamic sense.

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Section: Sunlightmentioning

confidence: 97%

Ecological factors in the inundative use of fungal entomopathogens

2009

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“…An unfortunate consequence of such reports is that it establishes unrealistic expectations regarding the performance of these agents in the field. Variations in temperature, humidity, and exposure to UV-irradiation are amongst some of the important abiotic factors that can significantly impact the efficacy of entomopathogenic fungi in field applications (Fernandes et al 2007;Le Grand and Cliquet 2013;Rangel et al 2005;Thompson et al 2006). Spore viability and persistence are also important considerations with some recent advances in our understanding of at least one molecular determinant involved, i.e., a putative fungal methyltransferase, reported by Qin et al (2014).…”

Section: Major Obstacles and Non-engineering Approachesmentioning

confidence: 98%

Improving mycoinsecticides for insect biological control

Ortiz‐Urquiza

Luo

Keyhani

2014

Appl Microbiol Biotechnol

140

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The desire for decreased reliance on chemical pesticides continues to fuel interest in alternative means for pest control including the use of naturally occurring microbial insect pathogens. Insects, as vectors of disease causing agents or as agricultural pests, are responsible for millions of deaths and significant economic losses worldwide, placing stresses on productivity (GDP) and human health and welfare. In addition, alterations in climate change are likely to affect insect ranges, expanding their access to previously constrained geographic areas, a potentially worrisome outcome. Metarhizium anisopliae and Beauveria bassiana, two cosmopolitan fungal pathogens of insects found in almost all ecosystems, are the most commonly applied mycoinsecticides for a variety of insect control purposes. The availability of the complete genomes for both organisms coupled to robust technologies for their transformation has led to several advances in engineering these fungi for greater efficacy and/or utility in pest control applications. Here, we will provide an overview of the fungal-insect and fungal-plant interactions that occur and highlight recent advances in the genetic engineering of these fungi. The latter work has resulted in the development of strains displaying (1) increased resistance to abiotic stress, (2) increased cuticular targeting and degradation, (3) increased virulence via expression of insecticidal protein/peptide toxins, (4) the ability to block transmission of disease causing agents, and (5) the ability to target specific insect hosts, decrease host fecundity, and/or alter insect behaviors.

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“…This fungus has shown great potential for the management of C. sordidus (Kaaya et al, 1993;Nankinga, 1999;Godonou et al, 2000). However, the potential for use of B. bassiana as a microbial insecticide against C. sordidus has been hampered by adverse ambient conditions, including temperature, sunlight, and rainfall, and high costs of producing the inoculum (Lingg & Donaldson, 1981;Hallsworth & Magan, 1999;Fuxa & Richter, 2004;Thompson et al, 2006). However, the potential for use of B. bassiana as a microbial insecticide against C. sordidus has been hampered by adverse ambient conditions, including temperature, sunlight, and rainfall, and high costs of producing the inoculum (Lingg & Donaldson, 1981;Hallsworth & Magan, 1999;Fuxa & Richter, 2004;Thompson et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Effect of endophytic Beauveria bassiana on populations of the banana weevil, Cosmopolites sordidus, and their damage in tissue‐cultured banana plants

Akello

Dubois²,

Coyne³

et al. 2008

Entomologia Exp Applicata

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The entomopathogen Beauveria bassiana (Balsamo) Vuillemin (Ascomycota: Hypocreales) survives as an endophyte in a wide range of plants, offering substantial protection against tunneling insect pests. Although current research indicates that the fungus can live as an endophyte in tissue-cultured banana plants, there is no information on the efficacy of endophytic B. bassiana against the banana weevil, Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae). Our study aimed at determining the effects of endophytic B. bassiana on oviposition rate and populations of the banana weevil, and their plant damage. Screenhouse studies were undertaken in which 8-week-old B. bassiana -inoculated tissue-cultured banana plants [cultivar Kibuzi, Musa spec. (Musaceae), genome group AAA-EA] were infested with female banana weevils. Five days after plant infestation with the banana weevil, there was no effect of B. bassiana on oviposition rate and egg hatchability. However, after 15 weeks, the presence of B. bassiana as an endophyte in banana tissues greatly reduced banana weevil populations and their damage to plants. Between 53.4 and 57.7% of the banana weevil adults died because of B. bassiana infection, resulting in a reduction of plant damage by 29.1-62.7% depending on plant part. Beauveria bassiana was re-isolated from different plant parts, but to a greater extent from the roots and rhizomes than from pseudostem bases. Artificial inoculation of B. bassiana in banana plants caused no negative impact on banana growth. Our study demonstrated for the first time that endophytic B. bassiana reduced populations of C. sordidus and the plant damage they cause, and can thus be an alternative method for effective delivery of this fungus to banana plants for the management of C. sordidus .

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Impact of moisture and UV degradation on Beauveria bassiana (Balsamo) Vuillemin conidial viability in turfgrass

Cited by 39 publications

References 23 publications

Ecological factors in the inundative use of fungal entomopathogens

Ecological factors in the inundative use of fungal entomopathogens

Improving mycoinsecticides for insect biological control

Effect of endophytic Beauveria bassiana on populations of the banana weevil, Cosmopolites sordidus, and their damage in tissue‐cultured banana plants

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