Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia

Abstract African horticulture is seriously affected by fruit flies, both native and invasive. Novel sustainable control methods need testing against the backdrop of smallholder-dominated farming of Africa. We evaluated the potential of male-specific attractants (parapheromones) laced with insecticid...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Tibebe Dejene Biasazin, Tadiwos W. Wondimu, Sebastian Larsson Herrera, Mattias Larsson, Agenor Mafra-Neto, Yitbarek W. Gessese, Teun Dekker
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eae7da9edc52411cbc4aacda5093a1f8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:eae7da9edc52411cbc4aacda5093a1f8
record_format	dspace
spelling	oai:doaj.org-article:eae7da9edc52411cbc4aacda5093a1f82021-12-02T13:57:25ZDispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia10.1038/s41598-020-80151-12045-2322https://doaj.org/article/eae7da9edc52411cbc4aacda5093a1f82021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80151-1https://doaj.org/toc/2045-2322Abstract African horticulture is seriously affected by fruit flies, both native and invasive. Novel sustainable control methods need testing against the backdrop of smallholder-dominated farming of Africa. We evaluated the potential of male-specific attractants (parapheromones) laced with insecticide to suppress the alien invasive Bactrocera dorsalis and native Ceratitis capitata. In large-scale guava, methyl-eugenol (ME)-bait stations combined with toxic protein baits suppressed B. dorsalis within 8 months but resulted in a resurgence of the displaced Ceratitis capitata. In smallholder farms, intervention using SPLAT-ME laced with spinosad was surprisingly unsuccessful. Subsequent mark-release-recapture experiments showed high dispersal rates of flies, covering many times a typical farm size, leading to a continuous influx of flies from surrounding areas. Several other factors important for intervention were evaluated. SPLAT-MAT-ME dollops remained attractive for over two weeks, although gradually becoming less attractive than fresh baits. Further, competitive displacement was observed: C. capitata selectively emerged from fruits in which B. dorsalis infestation was low. Finally, we evaluated whether ME could be combined with C. capitata male attractants [trimedlure (TML) and terpinyl acetate (TA)] without affecting attraction. Combining male lures did not affect catches directly, although at very high populations of B. dorsalis attracted to ME interfered with C. capitata trap entry. Although ME-based methods can effectively suppress B. dorsalis, they were not effective at single smallholder scale due to the high dispersive propensity of tephritids. Further, competitive release implies the need for a combination of lures and methods. These observations are important for developing control schemes tailored for African smallholder settings.Tibebe Dejene BiasazinTadiwos W. WondimuSebastian Larsson HerreraMattias LarssonAgenor Mafra-NetoYitbarek W. GesseseTeun DekkerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tibebe Dejene Biasazin Tadiwos W. Wondimu Sebastian Larsson Herrera Mattias Larsson Agenor Mafra-Neto Yitbarek W. Gessese Teun Dekker Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia
description	Abstract African horticulture is seriously affected by fruit flies, both native and invasive. Novel sustainable control methods need testing against the backdrop of smallholder-dominated farming of Africa. We evaluated the potential of male-specific attractants (parapheromones) laced with insecticide to suppress the alien invasive Bactrocera dorsalis and native Ceratitis capitata. In large-scale guava, methyl-eugenol (ME)-bait stations combined with toxic protein baits suppressed B. dorsalis within 8 months but resulted in a resurgence of the displaced Ceratitis capitata. In smallholder farms, intervention using SPLAT-ME laced with spinosad was surprisingly unsuccessful. Subsequent mark-release-recapture experiments showed high dispersal rates of flies, covering many times a typical farm size, leading to a continuous influx of flies from surrounding areas. Several other factors important for intervention were evaluated. SPLAT-MAT-ME dollops remained attractive for over two weeks, although gradually becoming less attractive than fresh baits. Further, competitive displacement was observed: C. capitata selectively emerged from fruits in which B. dorsalis infestation was low. Finally, we evaluated whether ME could be combined with C. capitata male attractants [trimedlure (TML) and terpinyl acetate (TA)] without affecting attraction. Combining male lures did not affect catches directly, although at very high populations of B. dorsalis attracted to ME interfered with C. capitata trap entry. Although ME-based methods can effectively suppress B. dorsalis, they were not effective at single smallholder scale due to the high dispersive propensity of tephritids. Further, competitive release implies the need for a combination of lures and methods. These observations are important for developing control schemes tailored for African smallholder settings.
format	article
author	Tibebe Dejene Biasazin Tadiwos W. Wondimu Sebastian Larsson Herrera Mattias Larsson Agenor Mafra-Neto Yitbarek W. Gessese Teun Dekker
author_facet	Tibebe Dejene Biasazin Tadiwos W. Wondimu Sebastian Larsson Herrera Mattias Larsson Agenor Mafra-Neto Yitbarek W. Gessese Teun Dekker
author_sort	Tibebe Dejene Biasazin
title	Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia
title_short	Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia
title_full	Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia
title_fullStr	Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia
title_full_unstemmed	Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia
title_sort	dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in ethiopia
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/eae7da9edc52411cbc4aacda5093a1f8
work_keys_str_mv	AT tibebedejenebiasazin dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia AT tadiwoswwondimu dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia AT sebastianlarssonherrera dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia AT mattiaslarsson dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia AT agenormafraneto dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia AT yitbarekwgessese dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia AT teundekker dispersalandcompetitivereleaseaffectthemanagementofnativeandinvasivetephritidfruitfliesinlargeandsmallholderfarmsinethiopia
_version_	1718392354767896576

Dispersal and competitive release affect the management of native and invasive tephritid fruit flies in large and smallholder farms in Ethiopia

Ejemplares similares