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Parasitism of Locally Recruited Egg Parasitoids of the Fall Armyworm in Africa

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Relation http://oar.icrisat.org/11528/
https://doi.org/10.3390/insects11070430
doi:10.3390/insects11070430
 
Title Parasitism of Locally Recruited Egg Parasitoids of the Fall Armyworm in Africa
 
Creator Laminou, S A
Ba, M N
Karimoune, L
Doumma, A
Muniappan, R
 
Subject Fall Armyworm
Pest Management
Entomology
 
Description The fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae),
is an insect native to the tropical and subtropical Americas that has recently spread to Africa,
where it predominately attacks maize, sorghum and other plant species. Biological control is
an environmentally friendly way of combatting the pest and contributes to an integrated pest
management approach. In Africa, several trichogrammatid parasitoids and Telenomus remus Nixon
(Hymenoptera: Platygastridae) have been found parasitizing eggs of the FAW. In Niger, the egg
parasitoids encountered include Trichogrammatoidea sp. (Hymenoptera: Trichogrammatidae) and
Telenomus remus Nixon. Parasitism of the FAW eggs by the two egg parasitoids was assessed in
the laboratory, followed by field testing on sentinel eggs. In the laboratory, T. remus parasitized on
average 78% of FAWeggs, compared to 25% for Trichogrammatoidea sp. Telenomus remus was able to
parasitize egg masses that were fully covered with scales, while Trichogrammatoidea sp. parasitized
only uncovered egg masses. On-farm releases of T. remus in sorghum fields caused up to 64% of FAW
egg parasitism. Parasitized eggs yielded viable progeny, which can contribute to FAW egg parasitism
build-up during the cropping season. Our findings lay the groundwork for the use of T. remus in
augmentative releases against FAW in Africa.
 
Publisher MDPI
 
Date 2020-07
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11528/1/insects-11-00430.pdf
Laminou, S A and Ba, M N and Karimoune, L and Doumma, A and Muniappan, R (2020) Parasitism of Locally Recruited Egg Parasitoids of the Fall Armyworm in Africa. Insects (TSI), 11 (7). pp. 1-13. ISSN 2075-4450