Actualisation de l'entomofaune des cultures maraîchères en Basse Casamance (Sénégal)

Tendeng, Etienne; Labou, Babacar; Djiba, Saliou; Diarra, Karamoko

doi:10.4314/ijbcs.v11i3.7

Cited by 24 publications

(18 citation statements)

References 7 publications

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“…In Senegal, arthropod pest complex can cause damage in field-grown (Labou et al, 2016a;Diatte et al, 2018b). However, many ecosystems have a great diversity of entomological species that plays an important role in natural regulation Tendeng et al, 2017;Diatte et al, 2018a). Very active during the night, adults of the FAW can move up to a distance exceeding 100 km (FAO, 2017).…”

Section: Discussionmentioning

confidence: 99%

The fall armyworm Spodoptera frugiperda (J.E. Smith), a new pest of maize in Africa: biology and first native natural enemies detected

Tendeng¹,

Labou²,

Diatte³

et al. 2019

Int. J. Bio. Chem. Sci

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The fall armyworm (FAW), Spodoptera frugiperda is a real threat to food security. It is able to totally destroy the cereal crops in a country. It can cause famine in Sub-Saharan Africa where cereals are subsistence crops. Reported in Africa in 2016, the FAW succeded to colonize 47 countries in one year. Its migration capacities wich are of around 100 km per night can allow it have fully infest a country like Senegal (ca 200 000 km²) in less than a week. The FAW is very difficult to fight because resistant to several insecticides. Invasive species often invade a new environment without their natural enemies, which promotes their multiplication and damage to crops. To estimate the generation number per year and evaluate the impact of biological control of indigenous natural enemies on the FAW, larvae were collected in maize fields and monitored in the laboratory. The results show that the development cycle of S. frugiperda takes 25 days on average, that is to say fifteen (15) generations per year. The study confirms the presence of three species of native natural enemies, a nematode Hexamermis sp. and two Hymenopterans Chelonus sp. and Campoletis sp. detected for the first time in West Africa on FAW larvae. The overall parasitism rate is 25.8%. These native natural enemies are a very promising means of control against FAW populations. The introduction of agricultural techniques to promote the maintenance and the proliferation of the FAW auxiliaries is an alternative to the use of pesticides.

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Section: Discussionmentioning

confidence: 99%

The fall armyworm Spodoptera frugiperda (J.E. Smith), a new pest of maize in Africa: biology and first native natural enemies detected

Tendeng¹,

Labou²,

Diatte³

et al. 2019

Int. J. Bio. Chem. Sci

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“…La mouche méditerranéenne des fruits a été également signalée sur poivrons et piments au Sénégal dans la zone des Niayes (Dakar) (Dia et al , 2015) et dans la région de Ziguinchor (Tendeng et al , 2017). De même, la présence de C. capitata a été rapportée sur cultures de piment à Port‐Bouët (Abidjan, Côte d’Ivoire) (Akesse et al , 2015).…”

Section: Résultat Et Discussionunclassified

“…Le taux d'infestation des fruits attribu es a C. capitata au sein de chaque rang ee, obtenu par inspection des dommages et recherche de larves, variait entre 3,9 AE 2,1% (Serre n°2) et 9,8 AE 2,4% (Serre n°1). La mouche m editerran eenne des fruits a et e egalement signal ee sur poivrons et piments au S en egal dans la zone des Niayes (Dakar) (Dia et al, 2015) et dans la r egion de Ziguinchor (Tendeng et al, 2017). De même, la pr esence de C. capitata a et e rapport ee sur cultures de piment a Port-Bou€ et (Abidjan, Côte d'Ivoire) (Akesse et al, 2015).…”

Section: R Esultat Et Discussionunclassified

Emergence de Ceratitis capitata (Diptera: Tephritidae) sur culture protégée de piment (Solanaceae) en zone subsaharienne (Algérie)

et al. 2020

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En Alg erie, la mouche m editerran eenne des fruits a longtemps et e associ ee a la production fruiti ere des r egions côti eres a climat temp er e. Avec le changement climatique, en particulier avec un automne et un printemps devenus plus chauds et secs, cette mouche s'est diss emin ee a de nouvelles localisations et cause d esormais des dommages a d'autres plantes hôtes. Elle est pr esente dans la zone subsaharienne du Souf (Alg erie) sur culture prot eg ee de piment (Capsicum annuum) o u elle cause des d egâts importants.

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“…The tomato fruitworm, Helicoverpa armigera (Hübner) (Lepidoptera, Noctuidae), is a serious pest causing substantial damages to a wide range of field and vegetable crops worldwide, including cotton, maize, sorghum, and tomato (Cunningham and Zalucki., 2014;CABI, 2016). It is a polyphagous pest (Tendeng et al, 2017; which presents a broad spectrum of distribution. In West Africa, H. armigera is the most damaging pest of field-grown tomato crops (Umeh et al, 2002;Huat, 2006;Mailafiya et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Insecticide resistance in field populations of the tomato fruitworm, Helicoverpa armigera, from Senegal

Sène¹,

Tendeng²,

Diatte³

et al. 2020

Int. J. Bio. Chem. Sci

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Monitoring of the evolution of insecticide resistance in the field is crucial to prevent pest control issues. The present study was conducted to assess insecticide resistance status of the fruitworm, Helicoverpa armigera (Hübner) (Lepidoptera, Noctuidae), the most destructive pest of field-grown tomato in Senegal. A sample of 11- 15 field populations were monitored for their susceptibility to abamectin, deltamethrin, and profenofos, using a standard leaf-dip bioassay method. Resistance ratios ranged from 1- to 30-fold to abamectin (4/15 populations with RR>10), 7- to 112-fold to deltamethrin (11/12 populations with RR>10), and 1- to 29-fold to profenofos (3/11 populations with RR>10). This indicates that resistance evolution to deltamethrin was widespread among field populations of H. armigera. However, an increasing trend of resistance to deltamethrin was observed from the South to the North of Niayes. Susceptibility to abamectin and profenofos was generally high but showed that resistance might be evolving within some populations. In addition, signs of cross-resistance to abamectin were detected, suggesting possible metabolic resistance mechanisms already selected in pyrethroid-resistant populations. The recorded high levels of pyrethroids resistance are a concern for the control of H. armigera in Senegal as the country is being currently embarking into economic expansion of tomato cropping systems. © 2020 International Formulae Group. All rights reserved. Keywords: Insecticide resistance, pyrethroids, avermectins, OPs, Helicoverpa armigera, West Africa

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Actualisation de l'entomofaune des cultures maraîchères en Basse Casamance (Sénégal)

Cited by 24 publications

References 7 publications

The fall armyworm <i>Spodoptera frugiperda</i> (J.E. Smith), a new pest of maize in Africa: biology and first native natural enemies detected

The fall armyworm <i>Spodoptera frugiperda</i> (J.E. Smith), a new pest of maize in Africa: biology and first native natural enemies detected

Emergence de Ceratitis capitata (Diptera: Tephritidae) sur culture protégée de piment (Solanaceae) en zone subsaharienne (Algérie)

Insecticide resistance in field populations of the tomato fruitworm, <i>Helicoverpa armigera</i>, from Senegal

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