First record of Spotted-wing drosophila Drosophila suzukii (Diptera: Drosophilidae) in Martín García Island wildlife refuge, Argentina

Here we report on the first peculiar detection of the spotted-winged drosophila, Drosophila suzukii (Matsumura) on Martín García Island, a wildlife refuge located in the Río de la Plata estuary, Argentina. Flies were collected using banana baited traps fermented with live yeast, in sandy areas with abundant presence of cactus in the interior of the island. The absence of cultivated host plants, e.g., fruit crops, and the small population of humans inhabiting the island make the presence of D. suzukii in this wildlife refuge unexpected. Previous detection of this fly in South America happened mostly within commercial fruit orchards and/or neighboring fields.

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Population dynamics of spotted wing drosophila (Drosophila suzukii) in orchards in the Zagreb area

Pomologia Croatica ◽

10.33128/pc.23.3-4.2 ◽

2020 ◽

Vol 23 (3-4) ◽

pp. 91-102

Author(s):

Ivana Pajač Živković ◽

Irena Brlić Puškarić ◽

Darija Lemić

Keyword(s):

Invasive Species ◽

Population Dynamics ◽

Overlapping Generations ◽

Host Plants ◽

Climatic Conditions ◽

Spotted Wing Drosophila ◽

Drosophila Suzukii ◽

Research Population ◽

Zagreb Area ◽

The City

The invasive species Drosophila suzukii (Matsumura, 1931), the spotted wing drosophila, was first recorded in Croatia in 2010. Since then, it has spread on Croatian territory but its presence has not yet been confirmed in the City of Zagreb. In this research population dynamics of D. suzukii was investigated in three orchards in Zagreb (Maksimir, Jelenovac, Zelenjak) in the period from 20th of March to 27th of November 2017. Feeding traps with apple vinegar were used for catching D. suzukii. The flight began in the period from 27th of June to 11th of July and lasted until 27th of November. The total pest catches were 874 specimens (Jelenovac 187, Maksimir 232 and Zelenjak 455). From September to November there was a continuous flight and a large increase in the number of caught flies, suggesting the presence of more overlapping generations. Besides the host plants, the development of the pest in this area is also enabled by suitable climatic conditions. The present population in the City of Zagreb County poses a danger to fruit producers in the Zagreb County. The results of this research are a contribution to better understanding of the population and the spread of the pest in Croatia.

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Evaluation of Exclusion Netting for Spotted-Wing Drosophila (Diptera: Drosophilidae) Management in Minnesota Wine Grapes

Journal of Economic Entomology ◽

10.1093/jee/toz143 ◽

2019 ◽

Vol 112 (5) ◽

pp. 2287-2294 ◽

Cited By ~ 4

Author(s):

Dominique N Ebbenga ◽

Eric C Burkness ◽

William D Hutchison

Keyword(s):

The United States ◽

Field Trials ◽

Spotted Wing Drosophila ◽

Wine Grape ◽

Fruit Crops ◽

Drosophila Suzukii ◽

Wine Grapes ◽

High Fecundity ◽

Untreated Check ◽

The Impact

Abstract Spotted-wing drosophila, Drosophila suzukii (Matsumura), an economically damaging invasive species of numerous fruit crops, was first detected in Minnesota in 2012. High fecundity, and short generation times facilitated a rapid rise in the global pest status of D. suzukii, particularly in North America and Europe. To date, the majority of crop injury research has focused on fruit crops such as blueberries, raspberries, and cherries. However, little is known regarding the impact of D. suzukii on the wine grape industry in the upper Midwest region of the United States. Field trials were conducted in Minnesota during the summers of 2017–2018 to examine season-long phenology of D. suzukii in wine grape vineyards and wineries, and to assess the efficacy of exclusion netting for control of D. suzukii. Four treatments were evaluated, 1) open plot check (control), 2) open plot treated with an insecticide, 3) exclusion netting, and 4) exclusion netting, with artificial infestations of D. suzukii adults. Exclusion netting was applied at véraison and removed at harvest. On each sample date, 20 berries (10 intact and 10 injured) were collected from each plot for dissection. The number of larvae and adults were recorded for each berry to determine infestation levels. As shown by mean larval infestations and injured berries across treatments, exclusion netting provided a significant reduction in the level of D. suzukii infested berries when compared with the untreated check. These results indicate that exclusion netting could provide an effective alternative management strategy for D. suzukii in wine grapes.

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Adventive larval parasitoids reconstruct their close association with spotted-wing drosophila in the invaded North American range

10.1101/2021.12.06.471517 ◽

2021 ◽

Author(s):

Paul K. Abram ◽

Michelle T. Franklin ◽

Tracy Hueppelsheuser ◽

Juli Carrillo ◽

Emily Grove ◽

...

Keyword(s):

British Columbia ◽

North America ◽

Host Plants ◽

Temporal Dynamics ◽

Close Association ◽

Growing Season ◽

Spotted Wing Drosophila ◽

Drosophila Suzukii ◽

Larval Parasitoids ◽

Percent Parasitism

AbstractTwo species of larval parasitoids of the globally invasive fruit pest, Drosophila suzukii (Diptera: Drosophilidae), Leptopilina japonica and Ganaspis brasiliensis (both Hymenoptera: Figitidae), were detected in British Columbia, Canada in 2019. Both are presumed to have been unintentionally introduced from Asia, however; the extent of their establishment across different habitats with diverse host plants used by D. suzukii was unclear. In addition, there was no knowledge of the temporal dynamics of parasitism of D. suzukii by these two parasitoids. We repeatedly sampled the fruits of known host plants of D. suzukii over the entire 2020 growing season in British Columbia. We documented the presence of L. japonica and G. brasiliensis and estimated the apparent percentage of D. suzukii parasitized. Across a large region of southwestern British Columbia, both L. japonica and G. brasiliensis were found to be very common across a variety of mostly unmanaged habitats over the entire course of the season (May-October) in the fruits of most host plants known to host D. suzukii larvae. The two parasitoids were responsible for more than 98% of D. suzukii larval parasitism and usually co-existed even within a host species. Parasitism of D. suzukii was variable among hosts plants and sites (0-66% percent parasitism) and appeared to be time-structured. Our study demonstrates that the close association between the two larval parasitoids and D. suzukii that exists in Asia has evidently been reconstructed in North America, resulting in the highest parasitism levels of D. suzukii yet recorded outside of its area of origin.

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First record of spotted wing drosophila Drosophila suzukii (Diptera: Drosophilidae) in Montenegro

Pesticidi i fitomedicina ◽

10.2298/pif1501035r ◽

2015 ◽

Vol 30 (1) ◽

pp. 35-40 ◽

Cited By ~ 3

Author(s):

Sanja Radonjic ◽

Snjezana Hrncic

Keyword(s):

Fruit Fly ◽

First Record ◽

Fruit Production ◽

Spotted Wing Drosophila ◽

Invasive Pest ◽

Drosophila Suzukii ◽

Laboratory Observation ◽

Set Up ◽

First Time

The spotted wing drosophila Drosophila suzukii Matsumura (Diptera: Drosophilidae) is an invasive pest originating from Southeast Asia. It was detected for the first time in Europe in 2008 (Spain and Italy) and subsequently in other European countries. It is a highly polyphagous pest that infests healthy, ripening fruit and presents a serious threat to fruit production, particularly of soft skinned fruit. In the first half of October 2013, a new fruit fly species was unexpectedly detected in Tephri traps baited with the three-component female-biased attractant BioLure that is regularly used for monitoring the Mediterranean fruit fly Ceratitis capitata Wiedem. (Diptera: Tephritidae) in Montenegro. Brief visual inspection identified the new species as the spotted wing drosophila D. suzukii. The pest was first recorded in several localities on the Montenegrin seacoast around Boka Kotor Bay. After the finding, all Drosophila specimens were collected from traps for further laboratory observation. A quick follow-up monitoring of other Tephri traps was carried out within the next few days on the rest of the seacoast (localities from Tivat to Ulcinj). Additionally, Tephri traps were set up around Lake Skadar and in the city of Podgorica, as well as on fresh fruit markets in Podgorica. The results of this preliminary study showed that D. suzukii was present in all surveyed locations and adults were captured until late December. Both sexes were found in traps with BioLure. Our data show that D. suzukii is present in southern parts of Montenegro and there is a serious threat of its further spreading, particularly towards northern parts of the country where the main raspberry and blueberry production is placed. The results also show that Tephri traps baited with BioLure can be used for detection and monitoring of spotted wing drosophila.

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Raspberry as a Source for the Development of Drosophila suzukii Attractants: Laboratory and Commercial Polytunnel Trials

Insects ◽

10.3390/insects10050137 ◽

2019 ◽

Vol 10 (5) ◽

pp. 137 ◽

Cited By ~ 6

Author(s):

Rodrigo Lasa ◽

Ricardo A. Toledo-Hernández ◽

Douglas Rodríguez ◽

Trevor Williams

Keyword(s):

Baker’S Yeast ◽

Spotted Wing Drosophila ◽

Mass Trapping ◽

Baker's Yeast ◽

Drosophila Suzukii ◽

Commercial Products ◽

Apple Cider ◽

Baited Traps ◽

Capture Rates ◽

Better Than

Several commercial products and home-made attractants have been developed for monitoring and mass-trapping of the spotted wing drosophila, Drosophila suzukii. Growers in Mexico have adopted an attractant based on a fermenting mixture of raspberry pulp and sucrose, with anecdotally promising results. We compared the capture rates of traps baited with raspberry pulp + sucrose with captures from a range of alternative attractants. Raspberry pulp alone or with sucrose was more attractive than apple cider vinegar (ACV) or SuzukiiTrap and similar to baker’s yeast + sucrose in laboratory cage studies. Synthetic raspberry aroma (0.1–10% concentration), in water or mixed with ACV, did not improve capture rates in the laboratory. Traps baited with raspberry + sucrose or ACV had similar captures of D. suzukii in raspberry or blackberry polytunnels in Michoacán, Mexico. Raspberry + sucrose baited traps captured significantly higher numbers of other drosophilid species, leading to higher total numbers of captured flies (all species), which may explain why Mexican growers favor the raspberry-based attractant. The commercial products SuzukiiTrap and Z-Kinol had lower captures than ACV in polytunnels, although SuzukiiTrap had the highest selectivity in captures of D. suzukii (81% of flies captured). A two-component trap (2C trap) baited with ACV + ethanol as the drowning solution and raspberry pulp + sucrose or baker’s yeast + sucrose in a ventilated tube device was markedly more effective than the trap currently used by growers. We conclude that raspberry pulp + sucrose is as effective for the attraction of D. suzukii as ACV under commercial polytunnel conditions. The 2C trap performed better than the transparent cup trap currently used by berry producers in Mexico.

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Phenology and spatial distribution of spotted-wing drosophila (Diptera: Drosophilidae) in lowbush blueberry (Ericaceae) in Saguenay-Lac-Saint-Jean, Québec, Canada

The Canadian Entomologist ◽

10.4039/tce.2020.30 ◽

2020 ◽

Vol 152 (4) ◽

pp. 432-449

Author(s):

William Champagne-Cauchon ◽

Jean-Frédéric Guay ◽

Valérie Fournier ◽

Conrad Cloutier

Keyword(s):

Spatial Distribution ◽

Spotted Wing Drosophila ◽

Invasive Pest ◽

Population Fluctuations ◽

Fruit Crops ◽

Cold Winter ◽

Drosophila Suzukii ◽

Eastern Canada ◽

Local Conditions ◽

Lowbush Blueberry

AbstractDrosophila suzukii (Matsumura) (Diptera: Drosophilidae), the spotted-wing drosophila, is an invasive pest of fruit crops, which appeared in eastern Canada in 2010. It represents a major threat to lowbush blueberry (Vaccinium angustifolium Aiton; Ericaceae) in the Saguenay-Lac-Saint-Jean region, Québec, Canada, at the northern limits of its distribution. The dynamics, overwintering capacity, population fluctuations, and damage to lowbush blueberry of D. suzukii are unknown in Saguenay-Lac-Saint-Jean. We aimed to 1) document D. suzukii abundance and phenology in lowbush blueberry in separate localities; 2) evaluate the potential of D. suzukii to overwinter and examine population dynamics over three seasons; and 3) study the spatial distribution of D. suzukii in lowbush blueberry fields with respect to forested borders. Drosophila suzukii is abundant in lowbush blueberry fields of Saguenay-Lac-Saint-Jean. In spring, D. suzukii were absent until late June, when few summer-morph females appeared. Drosophila suzukii densities started to increase regularly in August, with increasing male proportions, to culminate in fall at high levels with balanced sex ratios. Overwintering remains uncertain, D. suzukii being undetectable in spring despite intensive trapping. Appearance of diapausing winter morphs at high densities indicates that D. suzukii responds appropriately to local conditions preceding cold winter. Models of variation of D. suzukii densities and lowbush blueberry fruit infestation with distance from borders indicate that forest borders are favoured habitats over lowbush blueberry fields and the source of D. suzukii moving to some extent into lowbush blueberry fields.

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The Presence and Accessibility of Competitive Resources Affect Trapping Efficiency of Spotted-Wing Drosophila (Diptera: Drosophilidae)

Journal of Economic Entomology ◽

10.1093/jee/toaa271 ◽

2020 ◽

Author(s):

Sandeep Singh ◽

Juan Huang ◽

Matthew J Grieshop

Keyword(s):

Laboratory Experiments ◽

Production Systems ◽

Spotted Wing Drosophila ◽

Trapping Efficiency ◽

Fruit Crops ◽

Drosophila Suzukii ◽

Growing Seasons ◽

Yeast Cultures ◽

Soft Fruit ◽

Vinegar Fly

Abstract Spotted-wing drosophila (Drosophila suzukii, (Matsumura)) is an invasive vinegar fly that has become a serious threat to soft fruit crops. Monitoring for this pest is typically performed using drowning traps baited with live yeast cultures or fermentation volatile blends. Trapping programs using these compounds provide highly variable results across production systems, geographic regions, and growing seasons. Trap competition with fruit is one hypothesis for this inconsistency. This study evaluated the trapping efficiency of yeast and wine baits in the presence and absence of small quantities of host fruits in two binary-choice laboratory experiments. The first experiment evaluated trap capture in clear 946-ml traps with easily accessible water, apple pomace, blueberry, raspberry, strawberry, cherry, or grape as competitive influences. The second experiment evaluated the same competitors, but they were made less accessible. Recapture of flies in arenas containing competitive fruit was reduced by 64–88% when fruit was ‘accessible’ and from 0 to 51% when it was ‘inaccessible’ compared with arenas containing a water competitor. All fruit types provided statistically similar levels of trap interference. In the first experiment, yeast captured more flies compared with wine, whereas in the second experiment, wine captured more flies than yeast. Our results support the hypothesis that the presence of fruit or other reproductive resources will reduce trap captures and that this reduction is likely mediated by the relative accessibility of the fruit versus the trap. Thus, attempts to develop population estimates based on traps should incorporate fruit availability/accessibility.

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First record of Drosophila suzukii in Quebec vineyards

OENO One ◽

10.20870/oeno-one.2013.47.1.1537 ◽

2013 ◽

Vol 47 (1) ◽

pp. 69 ◽

Cited By ~ 3

Author(s):

Julien Saguez ◽

Jacques Lasnier ◽

Charles Vincent

Keyword(s):

First Record ◽

Spotted Wing Drosophila ◽

Yield Losses ◽

Drosophila Suzukii ◽

Laboratory Conditions

Aim: Surveys conducted between July and September 2012 in Quebec vineyards revealed the presence of the spotted wing drosophila (SWD), Drosophila suzukii Matsumura, just before harvest.Methods and results: Red and white grapevine cultivars from four vineyards were surveyed for leafhoppers by using a tapping method. Unexpectedly, a total of 30 SWD adults were collected from red grapevine cultivars, i. e., Marechal Foch, Gamay and Seyval Noir. Furthermore, a total of 101 SWD emerged from bunches selected in these vineyards and placed under laboratory conditions. No SWD were found in white cultivars.Conclusion: This is the first mention of SWD in grapevines grown for wine in Quebec.Significance and impact of the study: Spreading of SDW across Quebec vineyards may lead to important yield losses. Insecticide treatments need to be adapted to address this new entomological challenge.

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