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Invasive Drosophila suzukii facilitates Drosophila melanogaster infestation and sour rot outbreaks in the vineyards

View Article: PubMed Central - PubMed

ABSTRACT

How do invasive pests affect interactions between members of pre-existing agrosystems? The invasive pest Drosophila suzukii is suspected to be involved in the aetiology of sour rot, a grapevine disease that otherwise develops following Drosophila melanogaster infestation of wounded berries. We combined field observations with laboratory assays to disentangle the relative roles of both Drosophila in disease development. We observed the emergence of numerous D. suzukii, but no D. melanogaster flies, from bunches that started showing mild sour rot symptoms days after field collection. However, bunches that already showed severe rot symptoms in the field mostly contained D. melanogaster. In the laboratory, oviposition by D. suzukii triggered sour rot development. An independent assay showed the disease increased grape attractiveness to ovipositing D. melanogaster females. Our results suggest that in invaded vineyards, D. suzukii facilitates D. melanogaster infestation and, consequently, favours sour rot outbreaks. Rather than competing with close species, the invader subsequently permits their reproduction in otherwise non-accessible resources and may cause more frequent, or more extensive, disease outbreaks.

No MeSH data available.


Related in: MedlinePlus

Scenarios of sour rot (SR) aetiology in the (a) absence and (b) presence of D. suzukii. Without D. suzukii, sour rot necessitates grape wounds in which D. melanogaster can lay its eggs. With D. suzukii, pest oviposition triggers sour rot onset, leading to earlier disease development and the production of odours that attract D. melanogaster females for oviposition. D. suzukii would hence facilitates D. melanogaster infestation and sour rot disease outbreaks. Note that spots on the wings of D. suzukii females and spotted wings on D. suzukii larvae were added for the figure's convenience.
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RSOS170117F4: Scenarios of sour rot (SR) aetiology in the (a) absence and (b) presence of D. suzukii. Without D. suzukii, sour rot necessitates grape wounds in which D. melanogaster can lay its eggs. With D. suzukii, pest oviposition triggers sour rot onset, leading to earlier disease development and the production of odours that attract D. melanogaster females for oviposition. D. suzukii would hence facilitates D. melanogaster infestation and sour rot disease outbreaks. Note that spots on the wings of D. suzukii females and spotted wings on D. suzukii larvae were added for the figure's convenience.

Mentions: By invading the vineyard agrosystems, D. suzukii facilitates both D. melanogaster reproduction and sour rot disease progression. Our results suggest that oviposition and larval development of D. suzukii induces sour rot disease in initially pristine grape berries, even in the absence of D. melanogaster. During early sour rot development, associated odours could attract D. melanogaster females that would also lay their eggs and colonize the fruit. This would lead to heavy infestations of D. melanogaster and large sour rot development (figure 4). The combined influence of D. suzukii and D. melanogaster would then increase the prevalence of sour rot disease in vineyards and worsen the damage it produces.Figure 4.


Invasive Drosophila suzukii facilitates Drosophila melanogaster infestation and sour rot outbreaks in the vineyards
Scenarios of sour rot (SR) aetiology in the (a) absence and (b) presence of D. suzukii. Without D. suzukii, sour rot necessitates grape wounds in which D. melanogaster can lay its eggs. With D. suzukii, pest oviposition triggers sour rot onset, leading to earlier disease development and the production of odours that attract D. melanogaster females for oviposition. D. suzukii would hence facilitates D. melanogaster infestation and sour rot disease outbreaks. Note that spots on the wings of D. suzukii females and spotted wings on D. suzukii larvae were added for the figure's convenience.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5383864&req=5

RSOS170117F4: Scenarios of sour rot (SR) aetiology in the (a) absence and (b) presence of D. suzukii. Without D. suzukii, sour rot necessitates grape wounds in which D. melanogaster can lay its eggs. With D. suzukii, pest oviposition triggers sour rot onset, leading to earlier disease development and the production of odours that attract D. melanogaster females for oviposition. D. suzukii would hence facilitates D. melanogaster infestation and sour rot disease outbreaks. Note that spots on the wings of D. suzukii females and spotted wings on D. suzukii larvae were added for the figure's convenience.
Mentions: By invading the vineyard agrosystems, D. suzukii facilitates both D. melanogaster reproduction and sour rot disease progression. Our results suggest that oviposition and larval development of D. suzukii induces sour rot disease in initially pristine grape berries, even in the absence of D. melanogaster. During early sour rot development, associated odours could attract D. melanogaster females that would also lay their eggs and colonize the fruit. This would lead to heavy infestations of D. melanogaster and large sour rot development (figure 4). The combined influence of D. suzukii and D. melanogaster would then increase the prevalence of sour rot disease in vineyards and worsen the damage it produces.Figure 4.

View Article: PubMed Central - PubMed

ABSTRACT

How do invasive pests affect interactions between members of pre-existing agrosystems? The invasive pest Drosophila suzukii is suspected to be involved in the aetiology of sour rot, a grapevine disease that otherwise develops following Drosophila melanogaster infestation of wounded berries. We combined field observations with laboratory assays to disentangle the relative roles of both Drosophila in disease development. We observed the emergence of numerous D. suzukii, but no D. melanogaster flies, from bunches that started showing mild sour rot symptoms days after field collection. However, bunches that already showed severe rot symptoms in the field mostly contained D. melanogaster. In the laboratory, oviposition by D. suzukii triggered sour rot development. An independent assay showed the disease increased grape attractiveness to ovipositing D. melanogaster females. Our results suggest that in invaded vineyards, D. suzukii facilitates D. melanogaster infestation and, consequently, favours sour rot outbreaks. Rather than competing with close species, the invader subsequently permits their reproduction in otherwise non-accessible resources and may cause more frequent, or more extensive, disease outbreaks.

No MeSH data available.


Related in: MedlinePlus