Parasitoid Complex of Fall Armyworm, <i>Spodoptera frugiperda</i>, in Ghana and Benin

Insects. 2020;11(2):68 DOI 10.3390/insects11020068

 

Journal Homepage

Journal Title: Insects

ISSN: 2075-4450 (Print)

Publisher: MDPI AG

LCC Subject Category: Science

Country of publisher: Switzerland

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS


Lakpo Koku Agboyi (CABI, P.O. Box CT 8630, Cantonments, Accra GA 0376800, Ghana)

Georg Goergen (International Institute of Tropical Agriculture (IITA), 08 BP 0932 Tri Postal, Cotonou, Benin)

Patrick Beseh (Plant Protection and Regulatory Services Directorate (PPRSD), P.O. Box M37, Accra 00495426, Ghana)

Samuel Adjei Mensah (CABI, P.O. Box CT 8630, Cantonments, Accra GA 0376800, Ghana)

Victor Attuquaye Clottey (CABI, P.O. Box CT 8630, Cantonments, Accra GA 0376800, Ghana)

Raymond Glikpo (Plant Protection and Regulatory Services Directorate (PPRSD), P.O. Box M37, Accra 00495426, Ghana)

Alan Buddie (CABI, Bakeham Lane, Egham TW20 9TY, UK)

Giovanni Cafà (CABI, Bakeham Lane, Egham TW20 9TY, UK)

Lisa Offord (CABI, Bakeham Lane, Egham TW20 9TY, UK)

Roger Day (CABI, 673 Limuru Road, Muthaiga, P.O. Box 633, Nairobi 00621, Kenya)

Ivan Rwomushana (CABI, 673 Limuru Road, Muthaiga, P.O. Box 633, Nairobi 00621, Kenya)

Marc Kenis (CABI, 1 Rue des Grillons, 2800 Delémont, Switzerland)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 11 weeks

 

Abstract | Full Text

The fall armyworm, <i>Spodoptera frugiperda</i>, a moth originating from the American continent, has recently invaded most African countries, where it is seriously threatening food security as a pest of cereals. The current management methods rely heavily on the use of synthetic insecticides but there is a need for more sustainable control methods, including biological control. Surveys were conducted in two West African countries, Ghana and Benin, to determine the native parasitoid complex and assess parasitism rates of <i>S. frugiperda</i>. Samples of <i>S. frugiperda</i> eggs and larvae were collected in maize fields located in 56 and 90 localities of Ghana and Benin, respectively, from July 2018 to July 2019. Ten species were found parasitizing the pest, including two egg parasitoids, one egg&#8722;larval, five larval and two larval&#8722;pupal parasitoids. The two most abundant parasitoids in both countries were two Braconidae: the egg-larval parasitoid <i>Chelonus bifoveolatus</i> and the larval parasitoid <i>Coccygidum luteum.</i> Parasitism rates were determined in three Ghanaian regions and averages varied from 0% to 75% between sites and from 5% to 38% between regions. These data provide an important baseline for the development of various biological control options. The two egg parasitoids, <i>Telenomus remus</i> and <i>Trichogramma</i> sp. can be used in augmentative biological control and investigations should be conducted to assess how cultural practices can enhance the action of the main parasitoids, <i>C. luteum</i> and <i>Ch. bifoveolatus,</i> in the field. Understanding the parasitoid complex of <i>S. frugiperda</i> in Africa is also necessary before any development of classical biological controls involving the introduction of parasitoids from the Americas.