Loading...
Evaluation of African maize cultivars for resistance to Fall Armyworm Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) Larvae
Morales, Xavier Chiriboga Tamiru, Amanuel Sobhy, Islam S. Bruce, Toby J. A. Midega, Charles A. O. Khan, Zeyaur
Morales, Xavier Chiriboga
Tamiru, Amanuel
Sobhy, Islam S.
Bruce, Toby J. A.
Midega, Charles A. O.
Khan, Zeyaur
Citations
Altmetric:
Advisors
Editors
Other Contributors
EPub Date
Publication Date
2021-02-18
Submitted Date
Collections
Files
Loading...
Article - VoR
Adobe PDF, 1.61 MB
Other Titles
Abstract
The fall armyworm (FAW) has recently invaded and become an important pest of maize in Africa causing yield losses reaching up to a third of maize annual production. The present study evaluated different aspects of resistance of six maize cultivars, cropped by farmers in Kenya, to FAW larvae feeding under laboratory and field conditions. We assessed the arrestment and feeding of FAW neonate larvae in no-choice and choice experiments, development of larvae-pupae, food assimilation under laboratory conditions and plant damage in a field experiment. We did not find complete resistance to FAW feeding in the evaluated maize cultivars, but we detected differences in acceptance and preference when FAW larvae were given a choice between certain cultivars. Moreover, the smallest pupal weight and the lowest growth index were found on 'SC Duma 43' leaves, which suggests an effect of antibiosis of this maize hybrid against FAW larvae. In contrast, the highest growth index was recorded on 'Rachar' and the greatest pupal weight was found on 'Nyamula' and 'Rachar'. The density of trichomes on the leaves of these maize cultivars seems not to be directly related to the preference of neonates for feeding. Plant damage scores were not statistically different between cultivars in the field neither under natural nor artificial infestation. However, plant damage scores in 'Nyamula' and 'Jowi' tended to be lower in the two last samplings of the season compared to the two initial samplings under artificial infestation. Our study provides insight into FAW larval preferences and performance on some African maize cultivars, showing that there are differences between cultivars in these variables; but high levels of resistance to larvae feeding were not found.
Citation
Morales, X. C., Tamiru, A., Sobhy, I. S., Bruce, T. J. A., Midega, C. A. O., & Khan, Z. (2021). Evaluation of African maize cultivars for resistance to Fall Armyworm Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) Larvae. Plants, 10(2), article-number 392. https://doi.org/10.3390/plants10020392
Publisher
MDPI
Journal
Plants
Research Unit
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Series/Report no.
ISSN
EISSN
2223-7747
ISBN
ISMN
Gov't Doc
Test Link
Sponsors
This work was funded by Biotechnology and Biological Sciences Research Council of the UK with grant BB/R020795/1; the EU FAW-IPM project (FOOD/2018/402-634); the UK’s Foreign, Commonwealth & Development Office (FCDO); the Swedish International Development Cooperation Agency (SIDA); The Swiss Agency for Development and Cooperation (SDC); the Federal Democratic Republic of Ethiopia; and the Government of the Republic of Kenya.