Dissemination of entomopathogenic fungi using Busseola fusca male as vector

Maniania, Nguya K.; Ouna, Elizabeth; Ahuya, Peter; Frérot, Brigitte; Félix, Anne-Emmanuelle; Rü, Bruno Le; Calatayud, Paul‐André

doi:10.1016/j.biocontrol.2011.05.012

Cited by 14 publications

(7 citation statements)

References 31 publications

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“…This differential effect of sex of T. absoluta adults infected and serving as vector in fungal inoculum transmission might therefore be due to reduced mating frequencies by females that could be attributed to their weakness after acquisition of the conidia; or due to release of certain chemical cues that could be deterring the males from mating. However, these hypotheses need to be further ex- Noctuidae) (Maniania et al, 2011), the false codling moth, T. leucotreta (Mkiga et al, 2020) and the diamondback moth, Plutella…”

Section: Discussionmentioning

confidence: 99%

Entomopathogenic fungus isolates for adult Tuta absoluta (Lepidoptera: Gelechiidae) management and their compatibility with Tuta pheromone

Akutse

Subramanian

Khamis

et al. 2020

J Applied Entomology

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Tomato (Solanum lycopersicum Mill.) (Solanaceae) is one of the most widely cultivated and consumed Solanaceous vegetable crop in the world. It is a major source of nutritious food and socioeconomic driver, providing a means of livelihood for rural dwellers (Heuvelink, 2005; Wafula, Waceke, & Macharia, 2018). However, tomato production in Africa is seriously challenged by insect pests and diseases that cause significant yield loss. In Africa, yield losses generally varied and ranged from 11% to 43% but can reach as high as 100% in

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Section: Discussionmentioning

confidence: 99%

Entomopathogenic fungus isolates for adult Tuta absoluta (Lepidoptera: Gelechiidae) management and their compatibility with Tuta pheromone

Akutse

Subramanian

Khamis

et al. 2020

J Applied Entomology

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“…This device requires live trapping of the pest species in large numbers and their contamination with fungal conidia to cause fungus dissemination from infected insects to their conspecifics (Wegensteiner et al 2015). In the past, this strategy has been successfully used against different species of Coleoptera (Vega et al 1995(Vega et al , 2007Dowd and Vega 2003;Shimazu 2004;Lyons et al 2012), Diptera (Maniania et al 2011) and Lepidoptera (Pell et al 1993). However, little is known about the efficiency of the assisted fungal autodissemination device to control bark beetles.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of Dendroctonus simplex to Hypocreales fungi: towards the development of a biological control strategy

Srei¹,

Lavallée

Guertin³

2016

J Applied Entomology

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The use of Hypocreales fungi against bark beetles is an attractive alternative strategy for biological control in forestry. However, fungal inoculation methods remain a major challenge due to the cryptic behaviour of these beetles. Experiments were conducted to evaluate the susceptibility of adult eastern larch beetles, Dendroctonus simplex, to different isolates of Hypocreales fungi and to assess the efficiency of direct inoculation of fungal conidia using an assisted autodissemination device. Among the nine fungal isolates tested, Beauveria bassiana INRS‐242 was selected as the utmost isolate causing a mortality rate of 64.4% of D. simplex adults within 10 days and having a high conidial viability of 81.7%. Using an assisted autodissemination device, a fungal‐coated pouch was a promising contamination chamber. Once it had fallen onto the fungal‐coated pouch, each D. simplex adult loaded an average lethal dose of 2.1 × 109 conidia, which induced a mortality rate of 98.0%. Our results demonstrated the fungal pathogenicity of B. bassiana INRS‐242 against the eastern larch beetles and pointed out the potential of the assisted autodissemination device as an effective method of conidia inoculation. These findings represent the first step to develop a biological control strategy against D. simplex populations.

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“…Horizontal transmission by direct contact between fungal-infected and uninfected insects is a crucial phenomenon ensuring a natural dispersion of conidia in insect populations [9]. This fungal transmission could occur since their first contact during mating [10], as previously observed in various insect species such as the eastern larch beetle, Dendroctonus simplex LeConte [7], the European spruce bark beetle, Ips typographus L. [10], the Mexican fruit fly, Anastrepha ludens Loew [11], and the stem borer, Busseola fusca Fuller [12]. Under laboratory conditions, our results have demonstrated for the first time that an infected EAB adult can transmit the fungal isolate INRS-242 of B. bassiana to uninfected one during mating.…”

Section: Discussionmentioning

confidence: 99%

Horizontal transmission of the entomopathogenic fungal isolate INRS-242 of Beauveria bassiana in emerald ash borer, Agrilus planipennis Fairmaire

Srei

Lavallée

Guertin

2019

Preprint

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Emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an invasive and destructive 12 beetle that causes extensive damages to ash trees in North America. The entomopathogenic fungus 13 Beauveria bassiana is considered as an effective biological control agent for EAB adult populations.14 Using an assisted autodissemination with the fungal isolate INRS-242 of B. bassiana, our research 15 aims to investigate the possibility of horizontal transmission of the fungal disease from infected to 16 uninfected EAB adults during mating. Results show that the efficiency of fungal transmission is 17 significantly related to the sex of EAB carrying the pathogen. EAB males are the promising vector 18 to transmit INRS-242 isolate of B. bassiana to their partners during mating. Results strengthen the 19 potential of the fungal autodissemination device as a powerful biological strategy to control EAB 20 populations. 21 22 Beauveria bassiana 23 24 123 were carriers of the pathogen [14]. In D. simplex, horizontal transmission of INRS-242 isolate of 124 B. bassiana was greatest when females were inoculated with the fungus [7]. Our results show that125male-to-female transmission of the fungal isolate within EAB adults was higher than from female-to-126 male. During the assay, we also observed that some EAB males mated with at least two different 127 females (data not shown). This observation suggests that the proportion of contaminated males 128 would be increased by the fungal autodissemination device baited with lactones lure. In addition, 129because EAB males are more efficient to transmit the mycopathogen than females, this could lead to 130 an increase of the mycosis into the EAB population. This finding suggests that using the assisted 131 autodissemination device to release infected males in the new and small EAB population can be a 132 valuable strategy to increase the mortality rate of the adult population during the endemic phase. 133Adding another mortality factor to other biotic and abiotic factors could contribute to slow or to keep 134 the EAB population at a lower level, may eventually reduce oviposition on ash trees. 135 4 of 5 Acknowledgments: We are grateful to Cynthia O'Hearn for technical support.

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Dissemination of entomopathogenic fungi using Busseola fusca male as vector

Cited by 14 publications

References 31 publications

Entomopathogenic fungus isolates for adult Tuta absoluta (Lepidoptera: Gelechiidae) management and their compatibility with Tuta pheromone

Entomopathogenic fungus isolates for adult Tuta absoluta (Lepidoptera: Gelechiidae) management and their compatibility with Tuta pheromone

Susceptibility of Dendroctonus simplex to Hypocreales fungi: towards the development of a biological control strategy

Horizontal transmission of the entomopathogenic fungal isolate INRS-242 of Beauveria bassiana in emerald ash borer, Agrilus planipennis Fairmaire

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