Bioassay evaluation of the entomopathogenic fungus,<i>Lecanicillium longisporum</i>(Petch) Zare &amp; Gams against egg and nymphs of<i>Trialeurodes vaporariorum</i>Westwood in laboratory conditions

Panahi, Omid; Loni, Azadeh

doi:10.1080/03235408.2012.753188

Cited by 8 publications

(3 citation statements)

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“…The highest cumulative mortality levels were recorded on the instars in seedlings treated with I. fumosorosea and Aschersonia aleyrodis in L1–L3 nymphal instars and the puparia, but all four fungi strains showed the highest efficacy in the crawlers (L1 nymphal instars). Several studies have identified that young instars of Bemisia tabaci are more susceptible to fungal infections than the fourth instar 53–55 . In a commercial formulation containing 10 6 blastospores/mL for I. fumosorosea and 10 6 conidiospores/mL for Beauveria bassiana , I. fumosorosea and Beauveria bassiana induced mortality rates of 38% and 81%, respectively, in the immature stage of Bemisia tabaci 53 .…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have identified that young instars of Bemisia tabaci are more susceptible to fungal infections than the fourth instar. [53][54][55] In a commercial formulation containing 10 6 blastospores/mL for I. fumosorosea and 10 6 conidiospores/mL for Beauveria bassiana, I. fumosorosea and Beauveria bassiana induced mortality rates of 38% and 81%, respectively, in the immature stage of Bemisia tabaci. 53 In a separate study utilizing conidiospores of Lecanicillium muscarium, I. fumosorosea, and Beauveria bassiana, all at a uniform concentration of 6 × 10 8 conidiospores/mL, the authors recorded percentage mortalities of 94.2%, 90.6%, and 97.2%, respectively, in Bemisia argentifolii.…”

Section: Efficacy Of the Entomopathogenic Fungi On The Nymphal Stages...mentioning

confidence: 99%

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Control of sweet potato whitefly (Bemisia tabaci) using entomopathogenic fungi under optimal and suboptimal relative humidity conditions

Bohatá,

Folorunso,

Lencová

et al. 2023

Pest Management Science

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BACKGROUNDSweet potato whitefly (Bemisia tabaci) is one of the most destructive pests to an extensive host range of crops and vegetables. Pesticide‐dependent management programs have led to severe health problems, including pesticide poisoning and cancer in human beings, as well as pesticide resistance in insect pests. Entomopathogenic fungi (EPF) are considered safe and highly effective against many pests. Therefore, identifying the pathogenicity and virulence of EPFs against B. tabaci is a valuable addition to the management of their infestations. In this study, we investigated the efficacy of conidia suspensions of Aschersonia aleyrodis, Isaria fumosorosea, Beauveria bassiana, and Akanthomyces muscarius (= Lecanicillium muscarium) against nymphal stages of B. tabaci in cucumber seedlings under both optimal and suboptimal conditions.RESULTSAll of the EPFs demonstrated significant ovicidal effects, with the highest cumulative mortalities observed in A. aleyrodis (96.46%) and I. fumosorosea‐treated (94.60%) seedlings against host eggs and crawlers. Similarly, in the L4‐instars experiment, A. aleyrodis and I. fumosorosea were the most efficient, resulting in cumulative mortalities of 94.82% and 94.75%, respectively. However, B. tabaci cumulative mortalities on seedlings treated with A. muscarius (78.36%) and B. bassiana (85.90%) were also significantly different from untreated seedlings (7.10%). Under suboptimal relative humidity conditions (≤45% RH), A. aleyrodis exhibited greater tolerance to harsh conditions, causing a significantly higher infection rate in L1‐L2 nymphs (~92%) compared to the approximately 32% infected young nymphs observed in I. fumosorosea‐treated seedlings.CONCLUSIONAll the selected EPF were more effective against the young nymphal instars. Our results also highlight the efficacy of A. aleyrodis under suboptimal conditions.This article is protected by copyright. All rights reserved.

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Section: Discussionmentioning

confidence: 99%

Section: Efficacy Of the Entomopathogenic Fungi On The Nymphal Stages...mentioning

confidence: 99%

Control of sweet potato whitefly (Bemisia tabaci) using entomopathogenic fungi under optimal and suboptimal relative humidity conditions

Bohatá,

Folorunso,

Lencová

et al. 2023

Pest Management Science

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“…For this reason, the use of biological control is an appealing alternative strategy for us in integrated pest management programs to control whiteflies, which incorporates the use of parasitoids like Encarsia formosa (Ayelo et al, 2021) , Eretmocerus warrae (Hanan et al, 2017; López et al, 2010) and entomopathogens as Akanthomyces (as Lecanicillium ) species (Aiuchi et al, 2020). For instance, Lecanicillium longisporum and Lecanicillium muscarium caused mortality of eggs and different nymphal stages of T. vaporariorum (Malekan et al, 2015; Panahi & Loni, 2013). Also, L. muscarium repelled whiteflies and deterred the normal feeding behaviour of whiteflies (Moyo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

In vitro versus in planta: Comparing the compatibility of Akanthomyces lecanii with pesticides against Trialeurodes vaporariorum

Mejía

Espinel

2022

J Applied Entomology

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Lecabiol® is a registered biopesticide based on the entomopathogenic fungus Akanthomyces lecanii (Hypocreales: Cordycipitaceae) for the control of the greenhouse whitefly Trialeurodes vaporariorum (Hemiptera: Aleyrodidae) in tomato crops. This product is commonly applied with several pesticides and fungicides in integrated pest management programs, and a reduction in efficacy is expected. The present work aimed to evaluate the compatibility of A. lecanii with pesticides used in tomato. Three insecticides (bifenthrin, chlorfenapyr and spinetoram) and six fungicides (dimethomorph, kasugamycin, metalaxyl:mancozeb, difenoconazole, pyrimethanil and propineb: cymoxanil) were tested in vitro and in planta. The compatibility was determined by using the biological index (BI). For in vitro test, germination, mycelial growth and conidial production were evaluated, and for in planta, the mixture of pesticide + fungus and alternating applications was carried out to assess the efficacy to control the pest. The insecticide chlorfenapyr was compatible in vitro (BI = 78) but moderately toxic (BI = 52) when the product was applied as a mixture with the fungus to control T. vaporariorum in planta; in contrast, bifenthrin was initially classified as moderately toxic (BI = 57) but was compatible in planta (BI = 71). The fungicides dimethomorph and kasugamycin were compatible (BI = 81–97); propineb: cymoxanil was moderately toxic (BI = 51), and metalaxyl:mancozeb and difenoconazole were toxic (BI = 0–37) in vitro, whereas most fungicides were moderately toxic or toxic when evaluated in planta. The pesticides spinetoram and pyrimethanil remained compatible in both assays (BI = 85–90). For the alternating application, the fungicides dimethomorph and pyrimethanil significantly diminished the efficacy of the fungi below 40% to control T. vaporariorum. The findings demonstrate that compatibility of the fungus with insecticides and fungicides varied among in vitro and in planta assessments (combined or via alternation).

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Biocontrol of Planococcus citri (Hemiptera: Pseudococcidae) by Lecanicillium longisporum and Lecanicillium lecanii under laboratory and greenhouse conditions

Ghaffari

Karimi

Kamali

et al. 2017

Journal of Asia-Pacific Entomology

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Bioassay evaluation of the entomopathogenic fungus,Lecanicillium longisporum(Petch) Zare & Gams against egg and nymphs ofTrialeurodes vaporariorumWestwood in laboratory conditions

Cited by 8 publications

References 36 publications

Control of sweet potato whitefly (Bemisia tabaci) using entomopathogenic fungi under optimal and suboptimal relative humidity conditions

Control of sweet potato whitefly (Bemisia tabaci) using entomopathogenic fungi under optimal and suboptimal relative humidity conditions

In vitro versus in planta: Comparing the compatibility of Akanthomyces lecanii with pesticides against Trialeurodes vaporariorum

Biocontrol of Planococcus citri (Hemiptera: Pseudococcidae) by Lecanicillium longisporum and Lecanicillium lecanii under laboratory and greenhouse conditions

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