Beauveria bassiana (Clavicipitaceae): a potent fungal agent for controlling mosquito vectors of Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti (Diptera: Culicidae)

Ragavendran, Chinnasamy; Dubey, Nawal Kishore

doi:10.1039/c6ra25859j

Cited by 43 publications

(29 citation statements)

References 36 publications

(29 reference statements)

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“…demonstrated acute effects of B. bassiana on C. riparius first‐instar larvae at much higher concentrations (48‐h LC 50 34.7 mg L −1 ) than those found in this study (48‐h LC 50 6.35 μg L −1 ). Another study focused on other aquatic Dipteran larvae such as Anopheles stephensi , Culex quinquefasciatus and Aedes aegypti , reporting 24‐h LC 50 values ranging from 25.72 to 72.38 mg a.i./L, after exposure to B. bassiana , depending on the larval instar . Clark et al .…”

Section: Discussionmentioning

confidence: 99%

“…Another study focused on other aquatic Dipteran larvae such as Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti, reporting 24-h LC 50 values ranging from 25.72 to 72.38 mg a.i./L, after exposure to B. bassiana, depending on the larval instar. 63 Clark et al 64 was the first study showing the different susceptibility of larval and adult stages of different mosquito species to B. bassiana. Bukhari et al 24 confirmed toxicity of B. bassiana toward A. stephensi and Anopheles gambiae larvae as Bb decreased survival and consequently the number of emerged adults.…”

Section: Discussionmentioning

confidence: 99%

“…This shows that C. xanthus is extremely sensitive to B. bassiana Bb-based insecticides, but it is important to note that these data reported from the literature were obtained in exposures to the fungal species itself and not a commercial pesticide and under higher temperatures (25-28 ∘ C). Toxicity of microbial insecticides has been reported to be influenced by temperature, not only due to the existence of an optimal temperature for efficacy and development of the microorganisms (which is generally greater at higher temperatures) 59,[62][63][64][65][66][67][68][69][70][71] but also due to the effect that temperature changes may have on the insect's physiology and immune responses. 71,72 Temperature can have a crucial role in the magnitude of humoral and cellular immune responses, the effects being dependent on the immune measure.…”

Section: Discussionmentioning

confidence: 99%

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Toxicity of microbial insecticides toward the non‐target freshwater insect Chironomus xanthus

Dornelas

Sarmento

Silva

et al. 2019

Pest Management Science

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BACKGROUND Commercial formulations based on Bacillus thuringiensis subs. kurstaki (Btk) and Beauveria bassiana (Bb) are commonly used microbial insecticides in Brazil and other tropical regions. However, and despite being considered environmentally friendly, their use generates concerns regarding possible adverse ecological effects in freshwater ecosystems. Here, we evaluate the effects of these bioinsecticides on the tropical aquatic dipteran Chironomus xanthus under laboratory conditions. RESULTS After laboratory exposures to these compounds 48‐h median lethal concentration (LC50) values of 1534 μg a.i./L for Btk and of 6.35 μg a.i./L for Bb were estimated. Chronic assays revealed different sublethal effects: Btk‐based bioinsecticide exposure reduced C. xanthus growth [lowest observed effect concentration (LOEC) was 126 μg a.i./L for head width], decreased emergence rate (LOEC = 8 μg a.i./L) and increased immunological response (LOEC = 50 μg a.i./L) measured as total hemocyte count in larvae hemolymph. Exposure to low concentrations of Bb‐based insecticide also reduced C. xanthus growth (LOEC = 0.07 μg a.i./L for larvae body length measurements), and emergence rate (LOEC = 0.28 μg a.i./L), despite no clear effects on the total hemocyte counts. CONCLUSION Our results suggest that low concentrations of Btk and Bb bioinsecticides are toxic to C. xanthus. Given their widespread use and occurrence in tropical freshwater systems, research is needed to evaluate the potential effects of these compounds concerning natural freshwater insect communities and ecosystem functioning. © 2019 Society of Chemical Industry

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Toxicity of microbial insecticides toward the non‐target freshwater insect Chironomus xanthus

Dornelas

Sarmento

Silva

et al. 2019

Pest Management Science

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“…aegypti and Cx. quinquefasciatus larvae and lower toxicity effect was observed on non-target species [23]. The https://doi.org/10.1371/journal.pone.0232172.g005 na = total number of mosquito larvae used per each species, 25 larvae per replicate, three replicates were carried out, five concentrations were tested; LC 50 = lethal concentration killing 50% of exposed organisms; LCL = 95% lower confidence limits; UCL = 95% upper confidence limits; χ2 = chi square ( � s = significant (p < 0.05)); df = degrees of freedom.…”

Section: Plos Onementioning

confidence: 97%

Larvicidal toxicity of Metarhizium anisopliae metabolites against three mosquito species and non-targeting organisms

et al. 2020

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Background The fungal toxin acts as effective, low-cost chemical substances for pest control worldwide and also an alternative to synthetic insecticides. This study assessed the larvicidal potential of Metarhizium anisopliae fungi derived metabolites against Aedes aegypti, Anopheles stephensi, Culex quinquefasciatus and non-targeted organisms at 24hr post treatment. Method Isolation of entomopathogenic fungi M. anisopliae from natural traps confirmed by using 18s rDNA biotechnological tools. Crude extracts from M. anisopliae solvent extraction and their secondary metabolites were bio-assayed following WHO standard procedures against Ae. aegypti, An. stephensi and Cx. quinquefasciatus, Artemia nauplii, Eudrilus eugeniae, and Solanum lycopersicum after 24 hr exposure. Histopathological analysis of E. eugeniae treated with fungi metabolites toxicity compared to those treated with Monocrotophos after 24hrpost-treatment. M. anisopliae metabolites were characterized using GC-MS and FT-IR analysis. Results The larvicidal activity was recorded in highest concentration of 75μg/ml, with 85%, 97% and 89% mortality in Ae. aegypti, An. stephensi and Cx. quinquefasciatus respectively. M. anisopliae metabolites produced LC 50 values in Ae. aegypti, 59.83μg/ml, in An. stephensi,

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“…The In2Care mosquito traps manipulate the behavior of female mosquitoes by "skip oviposition" and finding cryptic breeding sites. At the same time, the B. bassiana spores will grow hyphae, feed upon the bodies, reproduce and kill the mosquitoes within 18 hours (Ragavendran et al, 2017).…”

Section: In2care Mosquito Trapmentioning

confidence: 99%

A Review: Autodissemination of Pyriproxyfen as Novel Strategy to Control Dengue Outbreaks

Ngesom¹,

Greenhalgh²,

Lasim³

et al. 2020

JST

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The new emergence and re-emergence of arbovirus infections transmitted by Aedes mosquitoes have been spreading across Southeast Asia, Central Africa, United States, tropical Oceania and has become a major of public health concern. These arbovirus diseases were found to have a similar vector, symptoms, and environments. The situation is complex due to no specific vaccine or treatments being available for the diseases. Therefore, vector control is currently the best defense against arbovirus diseases, but with its own challenges such as the difficulty in controlling scattered breeding sites and biological behavior. Herein, we present a literature review of studies on current techniques proposed to combat dengue transmission that can fill a crucial gap in vector control programs, which is the inability of conventional control methods to eliminate and destroy cryptic breeding sites. In particular, we focused on the concept of autodissemination, which is a self-delivery technique by manipulating the behavior of mosquitoes, carrying the insecticide and disseminating it to cryptic breeding sites. This technique has shown promising results in some countries and can be considered as an additional tool in a vector control program. Therefore, we conducted Boolean searches in several electronic databases including Google Scholar, PubMed, SciELO and ScienceDirect to identify relevant published data regarding dengue and autodissemination techniques.

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Beauveria bassiana (Clavicipitaceae): a potent fungal agent for controlling mosquito vectors of Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti (Diptera: Culicidae)

Abstract: The efficacy of bioactive compounds identified from Beauveria bassiana extracts as effective larvicidal and pupicidal agents against Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti mosquito vectors under laboratory conditions are studied.

Cited by 43 publications

References 36 publications

Toxicity of microbial insecticides toward the non‐target freshwater insect Chironomus xanthus

Toxicity of microbial insecticides toward the non‐target freshwater insect Chironomus xanthus

Larvicidal toxicity of Metarhizium anisopliae metabolites against three mosquito species and non-targeting organisms

A Review: Autodissemination of Pyriproxyfen as Novel Strategy to Control Dengue Outbreaks

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