First Record of Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) in Burkina Faso

Son, Diakalia; Bonzi, Schémaëza; Somda, Irénée; Bawin, Thomas; Boukraa, Slimane; Verheggen, François; Francis, Frédéric; Legrève, Anne; Schiffers, Bruno

doi:10.4001/003.025.0259

Cited by 25 publications

(16 citation statements)

References 16 publications

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“…In contrast to studies carried out elsewhere in Europe and Americas, except for few reports from Ethiopia, most of the studies done on T. absoluta from sub-Saharan Africa did not describe the insecticides susceptibility status of this pest. For, example, published data from Senegal [11], Burkina Faso [40], Niger [10], Tanzania [12], Angola [41], and Botswana [13] described only ecology and/or bionomics of this pest.…”

Section: Discussionmentioning

confidence: 99%

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

et al. 2019

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In 2016, northern Nigeria experienced a devastating infestation by the tomato leaf miner, leading to soaring in prices of tomatoes across the country. Unfortunately, information on the resistance status of this pest is lacking in northern Nigeria, hampering appropriate control measures. Here, we identified to species level and, using bioassays, characterised insecticide susceptibility profile of a field population of a tomato leaf miner from northern Nigeria. Highest resistance was observed with λ-cyhalothrin (a Type II pyrethroid) with a low mortality (18.52% at 56 h) and LD50 of 7461.474 ppm. Resistance was also established toward propoxur and chlorpyrifos-methyl with average mortalities each of 56% and LD50s of 1023.51 ppm and 106.351 ppm, respectively. Highest susceptibility was observed from abamectin with mortality of 86% and LD50 of 0.034 ppm. Pre-exposure to the synergist piperonylbutoxide significantly recovered λ–cyhalothrin susceptibility ((mortality~90%, χ2 = 98.35, p < 0.0001) and LD50 = 0.92 ppm) implicating P450 monoxygenases. No significant changes were observed on pre-exposure to diethyl maleate and triphenylphosphate-inhibitors of glutathione S-transferases and carboxylesterases, respectively. Sequencing of domain II of the voltage-gated sodium channel established 1014F kdr mutation 100% fixed in both λ-cyhalothrin-alive and dead larvae. These findings highlight the challenges for control of this invasive agricultural pest in northern Nigeria.

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Section: Discussionmentioning

confidence: 99%

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

et al. 2019

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“…As such, basal environmental stress tolerance, phenotypic plasticity and rapid genetic adaptive shifts are key to invasive species establishment [30]. Tuta absoluta tolerance to temperature and relative humidity versus typical Botswana climate [68] may form the primary characteristics defining its range expansion [1,37,68]. Prior predictions using climatic suitability indices defined the eco-climatic index (EI) of Botswana to fall within 20-50, classified as high risk of establishment for T. absoluta [1].…”

Section: Discussionmentioning

confidence: 99%

Evidence of rapid spread and establishment of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in semi-arid Botswana

2018

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Background: Tuta absoluta (Meyrick), a major invasive pest of Solanaceous plants, was recently detected in Botswana. Abiotic and biotic factors, together with a suite of population demographic traits are likely key for species propensity and invasion success. First, we determined the movement of T. absoluta from its core detection centre to new invasion areas using pheromone baiting and established likely biotic dispersal drivers. Second, we measured thermal tolerance vis critical thermal limits and lower and upper lethal limits to determine how these traits shape population establishment. Results: We detected T. absoluta in all 67 pristine sites across nine districts of Botswana. Within-district trap catches varied between cultivated and wild hosts but were generally not statistically significant (P > 0.001). We report three major wild host plants for T. absoluta as biotic dispersal drivers: Solanum coccineum (Jacq.), Solanum supinum (Dunal) and Solanum aculeatissimum (Jacq.). Solanum coccineum and S. supinum were omnipresent, while S. aculeatissimum distribution was sporadic. Thermal tolerance assays showed larvae were more heat tolerant, with a higher critical thermal maxima (CT max) than adults (P < 0.001), whereas the adults were more tolerant to cold with a significantly lower (P < 0.001) critical thermal minima (CT min) compared to larvae. The upper lethal temperatures ranged from 37-43 °C, whereas the lower lethal temperatures ranged from − 1 to − 12 °C for 0-100% mortality, respectively. In the light of prevailing environmental (habitat) temperatures (T hab), warming temperature (7.29 °C) and thermal safety margin (22.39 °C) were relatively high. Conclusion: Tuta absoluta may not be under abiotic physiological or biotic constraint that could limit its geographical range extension within Botswana. The ubiquity of wild Solanaceous plants with the bridgehead of year-round intensive monocultures of Solanaceous crops within a favourable climatic framework may mean that environmental suitability aided the rapid spread of T. absoluta.

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“…The pest spread to sub-Saharan Africa (Biondi et al, 2018), including Eritrea and Sudan (Mohamed et al, 2012), Ethiopia (Retta & Berhe, 2015), Niger (Adamou et al, 2016), Senegal (Pfeiffer et al, 2013), Kenya (Tonnang et al, 2015), Uganda (Tumuhaise et al, 2016), and Tanzania (Chidege et al, 2016). It has also been reported recently in Burkina Faso (Son et al, 2017), South Africa (Visser et al, 2017), and Nigeria (Borisade et al, 2017). The pest is multivoltine and larvae attack the parenchyma of leaves (mining) at any developmental stage of tomato plants, but they can also dig tunnels into stems and fruits (Desneux et al, 2010).…”

Section: Introductionmentioning

confidence: 93%

Seasonal decline of the tomato leafminer, Tuta absoluta, in the shifting landscape of a vegetable‐growing area

Sylla

Seydi

Diarra

et al. 2018

Entomologia Exp Applicata

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Insect pest populations exhibit seasonal dynamics in response to changes in resource availability or other environmental factors such as climatic conditions, natural enemies, and intra‐ or interspecific competition. Understanding such dynamics is critical for developing effective integrated pest management strategies. The objective of the present study was to identify factors driving the seasonal decline of the tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), in the shifting landscape of a vegetable‐growing area in Senegal. A set of 42 tomato fields was monitored for the number of T. absoluta adults caught in pheromone traps and for the incidence of larvae, during 5 months from June to November 2016 in the Niayes area (Senegal). The surface of solanaceous host crops, climatic conditions, and abundance of natural enemies were also monitored. A drastic decline in T. absoluta abundance was observed during the rainy season. The decrease in resource availability, especially tomato crops, in the surrounding landscape of monitored fields was the main factor affecting the population dynamics during the rainy season. However, alternative host crops such as eggplant and Ethiopian eggplant, can provide ‘reservoirs’ for residual populations of the pest. For applied purpose, it would be interesting to focus the management efforts on residual populations during the rainy season, to make more difficult the reconstitution of populations during the dry season.

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First Record of Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) in Burkina Faso

Cited by 25 publications

References 16 publications

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

Evidence of rapid spread and establishment of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in semi-arid Botswana

Seasonal decline of the tomato leafminer, Tuta absoluta, in the shifting landscape of a vegetable‐growing area

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