Pesticide resistance in Plutella xylostella (Lepidoptera: Plutellidae) populations from Togo and Benin

Agboyi, Lakpo Koku; Ketoh, Guillaume Koffivi; Martin, Thibaud; Glitho, Isabelle Adolé; Tamò, Manuele

doi:10.1017/s1742758416000138

Cited by 37 publications

(24 citation statements)

References 34 publications

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“…Many smallholders consider the use of chemical inputs as a strategy to ensure their production and their livelihood. However, the use of pesticides can no longer be considered as a solution to control insect pests because of the development of resistance (Martin et al 2002;Carletto et al 2010;Houndété et al 2010;Agboyi et al 2016) and because of their impacts on environment and human health (Wilson and Tisdell 2001;De Bon et al 2014). Research has been underway for more than 10 years on the use of insect proof nets over vegetable crops as a generic protection to control insect pests while ensuring sufficient natural ventilation.…”

Section: Control Of Insect Pests With Protected Cultivationmentioning

confidence: 99%

“…Vegetable production in SSA is seriously affected by pests and this onslaught will increase with the emergence of new insect pests such as the fruit fly Bactrocera spp., the red spider mite Tetranychus evansi (Azandémè-Hounmalon et al 2015) and recently the tomato leaf miner Tuta absoluta in SSA, which has caused up to 100% yield losses in some regions (Brévault et al 2014;Tonnang et al 2015;Chidege et al 2016). In Africa, pest control mainly relies on the use of chemical pesticides but this approach is not sustainable due to the development of resistance (Martin et al 2002;Carletto et al 2010;Houndété et al 2010;Agboyi et al 2016) as well as their impacts on the environment and on human health (Wilson and Tisdell 2001;De Bon et al 2014). Alarming studies in Ghana (Bempah et al 2012;Bempah et al 2016), Benin (Yehouenou et al, 2013), Senegal (Diop et al 2016) and in South Africa (Mutengwe et al 2016) highlight the risks Fig.…”

Section: Introductionmentioning

confidence: 99%

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Protected cultivation of vegetable crops in sub-Saharan Africa: limits and prospects for smallholders. A review

Nordey

Basset-Mens

Bon

et al. 2017

Agron. Sustain. Dev.

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Vegetable production in sub-Saharan Africa faces numerous agronomic constraints that will have to be overcome to feed the increasing population and to fight malnutrition. Technology transfer and the adoption of low-tech protected cultivation techniques affordable for smallholders are believed to be able to meet this challenge. Protected cultivation techniques are a set of agricultural practices aimed at artificializing the crop environment through the use of soil covers and/or plant covers to control pests and climatic conditions. Although protected cultivation techniques may increase the yield and quality of vegetable crops and extend their production periods worldwide, the transfer of these techniques in sub-Saharan Africa raises questions about their agronomical performances, their profitability but also their environmental impacts. Are low-tech protected cultivation techniques adapted to the sustainable production of vegetables by smallholders in sub-Saharan Africa? To answer this question, we present an overview of the agronomic, economic, and environmental performances of low-tech protected cultivation techniques in sub-Saharan Africa as reported in the literature. The major conclusions that can be drawn from the review are (1) low-tech protected cultivation techniques are not suitable in all climatic conditions in sub-Saharan Africa and need to be combined with other methods to ensure adequate pest control, (2) the profitability of protected cultivation techniques relies on the capacity to offset increased production costs by higher yields and higher selling prices to be obtained with off-season and/or higher quality products, (3) breaking with existing cropping systems, the lack of technical support and skills, and the limited access to investment funding are major obstacles to the adoption of protected cultivation techniques by smallholders (4) life cycle assessments conducted in northern countries suggested that more efficient use of agricultural inputs would offset the negative impacts of protected cultivation techniques if they are properly managed, but further studies are required to be sure these results can be extrapolated to sub-Saharan Africa context. (Résumé d'auteur

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Section: Control Of Insect Pests With Protected Cultivationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Protected cultivation of vegetable crops in sub-Saharan Africa: limits and prospects for smallholders. A review

Nordey

Basset-Mens

Bon

et al. 2017

Agron. Sustain. Dev.

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“…Resistance to pesticides in several major insect pests of vegetable crops (e.g. whiteflies and Lepidoptera) has been reported in Africa thereby reducing their efficiency (Agboyi et al, 2016;Houndété et al, 2010;Martin et al, 2002;Grzywacz et al, 2010). Inappropriate use of pesticides threatens not only the environment but also the health of producers and consumers, as reported in numerous studies revealing pesticide residues beyond maximum residue limits in fruits and vegetables sold in local markets in SSA (Bempah et al, 2012;Amoah et al, 2006;Ahouangninou et al, 2012;Lehmann et al, 2017;Diop et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Mitigation of climatic conditions and pest protection provided by insect-proof nets for cabbage cultivation in East Africa

Nordey

Faye²,

Chailleux³

et al. 2020

Ex. Agric.

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Summary Although several studies have underlined the advantages of using insect-proof nets to improve yields while reducing the use of pesticides, one obstacle to the diffusion of this technique in tropical conditions is the associated increase in temperature in the tunnel. The aim of this work was to assess the interest of combining the physical protection provided by nets against insect pests with the beneficial impacts of using shade nets to grow cabbages. A two-season experiment was set up to compare temperature conditions, insect pest populations, yields, and the quality of cabbage crops grown in the open field and in low tunnels covered with nets providing different degrees of shading, 17.2% by white and 50.1% by silver nets. During the day, the temperature under the white and silver nets was 10.4 °C and 6.3 °C higher, respectively, than in the open field in the first season, and 6.5 °C and 5.9 °C higher in the second season. Both insect-proof nets significantly reduced insect pest populations and hence the need for insecticide treatments. The white nets increased marketable yield by 45.4% in the first season and by 16.4% in the second compared to yields in the open field, whereas silver nets reduced yield by 18.6% and 15.0%, respectively. The reduction in yield under silver nets was attributed to excessive shading that prevented the light requirements of cabbage crops from being fulfilled. Economic analysis raised some concerns about the profitability of the use of netting to grow cabbage due to investment costs and the lack of premium prices for vegetables produced with fewer pesticides in local markets.

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“…Thus, to improve yields and respond to the ever-increasing markets demand, the use of synthetic pesticides by producers is almost systematic [11,12]. As a result, repeated use of synthetic pesticides has raised many concerns about human health and the environment while promoting the development of resistant strains of pests [11,13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Biopesticide Potentialities of Eagle Fern (Pteridium aquilinum) and Ricin (Ricinus communis) in the Protection of Vegetables Crops

Carine

Kekeunou

Djoukouo

et al. 2019

JEAI

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Introduction: Pesticides commonly used in crop protection are serious causes of ecological and sanitary disorders. Aims: This present work investigates the biopesticide properties of Pteridium auquilinum and Ricinus communis in the protection of three vegetable crops Lactuca sativa, Solanum nigrum and Raphanus sativus. Place and Duration of Study: The experimental tests were conducted on the site of BIONATURE (Bafoussam, Cameroon) from 24 June to 30 August 2017. Methodology: Four types of preparations were made and bioefficacy tests consisted of contact treatments. Direct observations on the physical aspect of the plant, agronomic measurements, and pathology monitoring were carried out. Results: The results show that the fermentation of the fern is complete after 5 days versus 8 days for the castor. The aqueous extracts of fern have insect repellent, insecticidal and fungicidal properties. Diluted maceration of fern (88.75%) was more efficient than the pure maceration (68%). Conclusion: Manure and castor oil have insecticidal and repellent properties. The monitoring of pathologies after treatment reveals that castor oil is more effective than fern manure in control of gray rots and Tip burn attacks.

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Pesticide resistance in Plutella xylostella (Lepidoptera: Plutellidae) populations from Togo and Benin

Cited by 37 publications

References 34 publications

Protected cultivation of vegetable crops in sub-Saharan Africa: limits and prospects for smallholders. A review

Protected cultivation of vegetable crops in sub-Saharan Africa: limits and prospects for smallholders. A review

Mitigation of climatic conditions and pest protection provided by insect-proof nets for cabbage cultivation in East Africa

Biopesticide Potentialities of Eagle Fern (Pteridium aquilinum) and Ricin (Ricinus communis) in the Protection of Vegetables Crops

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