Virulence of the entomopathogenic fungusLecanicillium longisporumagainst the greenhouse whitefly,Trialeurodes vaporariorumand its parasitoidEncarsia formosa

Fazeli‐Dinan, Mahmoud; Talaei-Hassanloui, Reza; Goettel, Mark S.

doi:10.1080/09670874.2016.1182228

Cited by 16 publications

(21 citation statements)

References 51 publications

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“…Refined culture filtrates of entomopathogenic fungi, V. lecanii and B. bassiana, decreased the reproductive rate of aphids [26,27] and prevented feeding of the larva of Spodoptera littoralis and Bemisia tabaci [28,29]. Increased fungus concentration decreased the number of adult parasitoids and also negatively affected its developmental stages [30]. Filtrate culture contains many enzymes like chitinases, lipases, and protease, and these enzymes help in the infection process by degrading the cuticle of insects.…”

Section: Introductionmentioning

confidence: 99%

Biocontrol Potential of Some Entomopathogenic Fungal Strains Against Bean Aphid Megoura japonica (Matsumura)

Trinh

Qiu

2020

Agriculture

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This research reported the in vitro pathogenicity of Verticillium lecanii strains, L2 and L5, and Beauveria bassiana strains, B76 and B252, against Megoura japonica using leaf-dip method. The virulence potential of these four entomopathogenic fungal strains of V. lecanii and of B. bassiana were compared between fungi conidia (concentrations 1 × 106, 1 × 107, and 1 × 108 conidia mL−1) and culture filtrate. Moreover, binary combination of four different fungal strains (L2 + B76, B76 + L5, L2 + B252, and L2 + B76 + B252 + L5) were evaluated against M. japonica under control condition. Aphid mortality was recorded after two, four, six, and eight days of post-treatment. In the conidial concentration bioassay, strain B76 showed maximal mortality (85.3%) against bean aphid, and strain L5 showed the lowest effect (60.0%) at the highest concentration (1 × 108 conidia mL−1) at eight days post-treatment. Whereas, binary combinations of B76 and L2 strains showed the highest effect against M. japonica (90.5%) than other combinations. Moreover, in comparison with the effect of filtrate and conidia bioassay, 91.4% and 84.1% were achieved in strain B76, and the lowest effect (63.8% and 55.1%) was recorded in strain L5.

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Section: Introductionmentioning

confidence: 99%

Biocontrol Potential of Some Entomopathogenic Fungal Strains Against Bean Aphid Megoura japonica (Matsumura)

Trinh

Qiu

2020

Agriculture

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“…Regarding the curves of the age-specific survivorship ( l x ) and age-specific fecundity ( m x ) of T. urticae at different treatments, increasing sub-lethal concentrations had detectable effects on the mortality rate and fecundity of this pest. Similar reports were published for the survivorship schedules of T. urticae , F. occidentalis , Encarsia formosa Gahan, and Planococcus citri Risso when treated by B. bassiana strain 432.99, B. bassiana strian SZ-26, and Lecanicillium longisporum strain LRC190 and L. longisporum , respectively (Chandler et al ., 2000; Wu et al ., 2014; Fazeli-Dinan et al ., 2016; Ghaffari et al ., 2017). Among different population parameters, the intrinsic rate of increase ( r ) has been considered as the most applicable index that takes both fecundity and survivorship of individuals into account.…”

Section: Discussionmentioning

confidence: 99%

Biological responses of Tetranychus urticae (Acari: Tetranychidae) to sub-lethal concentrations of the entomopathogenic fungus Beauveria bassiana

Kheradmand

Heidari

Sedaratian-Jahromi

et al. 2021

Bull. Entomol. Res.

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Tetranychus urticae (Acari: Tetranychidae) is one of the most important pests of agricultural crops with worldwide distribution causing considerable damage to different products. Application of chemical acaricides is one of the most important strategies used for the control of this pest. Entomopathogenic fungi, however, have been proposed as alternative control agents. In this study, sub-lethal effects (LC10 = 6.76 × 102, LC20 = 8.74 × 103, and LC30 = 55.38 × 103 conidia ml−1) of Beauveria bassiana strain TV on the life table parameters of T. urticae were evaluated under laboratory conditions. The results demonstrated that by increasing the concentration, a significant decline was observed in adult longevity of both male and female individuals. Total fecundity of T. urticae was calculated as 45.16, 36.28, 23.98, and 18.21 eggs in control, LC10, LC20, and LC30 treatments, respectively. Sub-lethal concentrations drastically affected the population parameters of this mite pest. The intrinsic rate of increase (r) ranged from 0.1983 to 0.1688 day−1 for the mites treated with distilled water and LC20 treatments, respectively. The net reproductive rate (R0) was affected by the sub-lethal concentrations (lower value at LC30 concentration: 11.19 offspring/individual). Considering the detrimental effects of B. bassiana on some biological parameters of T. urticae, it can be concluded that this product can be used to develop targeted interventions aimed at integrated pest management of this pest.

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“…The isolated fungal cultures were identified microscopically using the slide culture technique (Fazeli-Dinan et al 2016). A block of 1 cm 2 of potato dextrose agar was placed into a sterile petri dish containing a glass slide.…”

Section: Morphological Characterizationmentioning

confidence: 99%

Biodiversity and virulence characterization of entomopathogenic fungi isolated from soils in different regions of Nigeria

Yakubu

Ladan

Deba

et al. 2022

Egypt J Biol Pest Control

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Background Studying the diversity of the indigenous entomopathogenic fungi (EPF) is a prerequisite to effective insect pest control. The distribution and occurrence of EPF from the soil across Nigeria were evaluated. Three subsoil samples from three locations in each of the 11 states were used to isolate the fungi by the insect bait method. Three fungal rates, 1.0 × 102, 5.0 × 101 and 7.5 × 101 spores/ml, were applied to the Galleria larvae. Results EPF occurred in 41.1% of the soil sampled. These fungi belong to five and an unidentified genus. High species diversity was observed in Abuja with 6 species, and a uniform diversity of 5 species in Gombe, Ibadan, Jos, Kano, Lagos, Nasarawa and Port Harcourt. The Shannon–Wiener index ranges from 2.48 to 1.84. Similarly, species evenness showed a distinct similarity across the 11 sampling states and ranges from 0.99 to 0.92. Simpson Diversity Index was found to be highest in Bauchi with 0.31 and lowest in Abuja with 0.19. The mortality of the Galleria mellonella (L.) larvae differed significantly (P < 0.01) with EPF species and time of exposure. There was also a strong (P < 0.001) relationship between larval mortality and conidial concentration within and among the species. The virulence of the isolated fungi on Galleria mellonella larvae based on LC50 differs with states (sampling site) even within the same species. Conclusions The present study uncovered the diversity and occurrence of EPF in soil across Nigeria. In addition, the results can be useful in selecting the suitable soils and best adapted EPF in a particular soil across the study area, or it could be the beginning of a molecular study.

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Virulence of the entomopathogenic fungusLecanicillium longisporumagainst the greenhouse whitefly,Trialeurodes vaporariorumand its parasitoidEncarsia formosa

Cited by 16 publications

References 51 publications

Biocontrol Potential of Some Entomopathogenic Fungal Strains Against Bean Aphid Megoura japonica (Matsumura)

Biocontrol Potential of Some Entomopathogenic Fungal Strains Against Bean Aphid Megoura japonica (Matsumura)

Biological responses of Tetranychus urticae (Acari: Tetranychidae) to sub-lethal concentrations of the entomopathogenic fungus Beauveria bassiana

Biodiversity and virulence characterization of entomopathogenic fungi isolated from soils in different regions of Nigeria

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