A mechanism of pathogenicity of Beauveria bassiana on larvae of the imported fire ant, Solenopsis richteri

Broome, Joe R.; Sikorowski, P. P.; Norment, B.R.

doi:10.1016/0022-2011(76)90074-4

Cited by 38 publications

(22 citation statements)

References 2 publications

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“…The lack of B. bassiana conidia in endophytic plants (Wagner and Lewis, 2000) also suggests a mode of action involving feeding deterrence or antibiosis rather than direct fungal infection. If spores were present, per os infection could be possible (Gabriel, 1959;Broome et al, 1976;Bell and Hamalle, 1980) although it could be difficult to discern between actual per os infection and infection due to spores coming in contact with the insect cuticle (Allee et al, 1990;Inglis et al, 1996). A study by Cherry et al (1999Cherry et al ( , 2004 in Africa supports the feeding deterrence/antibiosis hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Entomopathogenic fungal endophytes

Vega¹,

Posada²,

Aime³

et al. 2008

Biological Control

429

238

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Fungal endophytes are quite common in nature and some of them have been shown to have adverse effects against insects, nematodes, and plant pathogens.Our research program is aimed at using fungal endophytes-mediated plant defense as a novel biological control mechanism against the coffee berry borer, the most devastating pest of coffee throughout the world. A survey of fungal endophytes in coffee plants from Hawaii, Colombia, Mexico, and Puerto Rico has revealed the presence of various genera of fungal entomopathogens, including Acremonium, Beauveria, Cladosporium, Clonostachys, and Paecilomyces. Two of these, B. bassiana and Clonostachys rosea, were tested against the coffee berry borer and were shown to be pathogenic. This paper reviews the possible mode of action of entomopathogenic fungal endophytes. Published by Elsevier Inc.

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Section: Discussionmentioning

confidence: 99%

Entomopathogenic fungal endophytes

Vega¹,

Posada²,

Aime³

et al. 2008

Biological Control

429

238

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“…Death of the affected insects results from toxaemia or nutrient depletion. Although integumental penetration is the most common method of entry, it has been demonstrated that B. bassiana penetrates several non-acridid insect species via the gut after the insect has ingested spores (Bao & Yendol, 1971;Broome et al, 1976). In the Colorado potato beetle, spores were shown to penetrate the integument after being consumed and excreted in the faeces (Allee et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Reduction of grasshopper populations following field application of the fungusBeauveria bassiana

Johnson¹,

Goettel²

1993

Biocontrol Science and Technology

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Conidia of the Hyphomycete fungus Beauveria bassiana (Bals.) were applied in an attempt to reduce field populations of grasshoppers, primarily the migratory grasshopper Melanoplus sanguinipes (Fabricius). Dry spores were applied with wheat bran carrier to three fallow fields at a rate of 2.0 × 10 13 spores ha -1 in 10 kg bait ha -1 . Examination of culture plates that had been placed in the field to capture spores and of bran carrier with scanning electron microscopy indicated that a substantial portion of the B. bassiana colony-forming units (spores and clumps of spores) did not adhere to the bran and were applied in the field as free particles. Grasshoppers collected from the treated plots at intervals after application were assayed for infection by B. bassiana. The observed rate of mycosis in the treated populations was 70% of those collected after 2 days, declining to 41% by 13 days and 5% by 19 days after application. Analysis of reductions in population density gave results in agreement with the infection data. Treated populations declined 60% and 33% by 9 and 15 days after application respectively. The reductions were significant on both post-treatment sampling dates (p < 0.05) and the three replicated fields gave comparable results. This is the first field demonstration of effectiveness of this fungus as a microbial control agent of grasshoppers.

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“…Although B. bassiana may infect insects via the respiratory system [6] and alimentary tract [2,4,14,28], penetration through the external integument is the most common route of invasion [1, 13,21,26].…”

Section: Introductionmentioning

confidence: 99%

Infection byBeauveria bassiana ofLeptinotarsa decemlineata larvae as a consequence of fecal contamination of the integument followingper os inoculation

et al. 1990

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A study of per os inoculated larvae was undertaken to determine if the entomopathogenic fungus, Beauveria bassiana, is able to infect the Colorado potato beetle, Leptinotarsa decemlineata, via the alimentary tract. Surface or per os inoculated larvae which were immediately surface sterilized post inoculation did not succumb to infection, whereas those larvae not sterilized became infected. Histological studies of fed or starved, agnotobiotic (with microbial flora) and axenic larvae revealed that conidia can germinate in the gut regardless of the presence of gut microflora. However, infection via the alimentary tract was never observed in fed larvae and only noted in a single starved individual. It is concluded that infections of per os inoculated larvae occurred after surface contamination of the integument by viable conidia contained in the frass. The rate of food passage through the gut is probably important in preventing per os infections.Abbreviations: CFU: colony forming units, SDAY: Sabouraud dextrose agar plus 2~o yeast extract, SDAY + G: SDAY plus 0.2~o gentamycin sulphate, SWT: sterile water with 0.5~o Tween 80.

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A mechanism of pathogenicity of Beauveria bassiana on larvae of the imported fire ant, Solenopsis richteri

Cited by 38 publications

References 2 publications

Entomopathogenic fungal endophytes

Entomopathogenic fungal endophytes

Reduction of grasshopper populations following field application of the fungusBeauveria bassiana

Infection byBeauveria bassiana ofLeptinotarsa decemlineata larvae as a consequence of fecal contamination of the integument followingper os inoculation

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