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

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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Outbreaks of Tomostethus nigritus (Fabricius, 1804) (Hymenoptera, Tenthredinidae) on Fraxinus angustifolia ‘Raywood’ in Belgium

Journal of Hymenoptera Research ◽

10.3897/jhr.72.38284 ◽

2019 ◽

Vol 72 ◽

pp. 67-81

Author(s):

Fons Verheyde ◽

Geert Sioen

Keyword(s):

Population Dynamics ◽

Crucial Role ◽

Western Europe ◽

Population Level ◽

Climatic Conditions ◽

Future Research ◽

Pest Species ◽

Satisfactory Explanation ◽

Fraxinus Angustifolia ◽

The City

In Western Europe the ash sawfly Tomostethus nigritus is known to occur at low densities on Fraxinus excelsior and is uncommonly reported as a pest species. However, we show here that outbreaks can occur on non-endemic trees such as F. angustifolia, and that the species is able to spread quickly using city infrastructure. At the visited localities near the city of Ghent, foliage of Fraxinus angustifolia ‘Raywood’ emerged approximately one month earlier than on F. excelsior. At the same time, changed climatic conditions in the last decade, i.e. higher temperatures in March, caused adults to emerge earlier. Synchronicity of the potential hosts and T. nigritus may therefore have altered, playing a crucial role in population dynamics. Future research should aim to confirm if the species dramatically declines in numbers after reaching its peak population level, an effect which was observed in previous studies, but for which there is still no satisfactory explanation.

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

Revista de la Sociedad Entomológica Argentina ◽

10.25085/rsea.800309 ◽

2021 ◽

Vol 80 (3) ◽

pp. 53-57

Author(s):

Lautaro E. Bennardo ◽

Lucas E. Kreiman ◽

Luciano M. Gandini ◽

Johnma J. Rondón ◽

Lucía Turdera ◽

...

Keyword(s):

Host Plants ◽

First Record ◽

Small Population ◽

Spotted Wing Drosophila ◽

Fruit Crops ◽

Drosophila Suzukii ◽

Wildlife Refuge ◽

Baited Traps ◽

Fruit Orchards ◽

Live Yeast

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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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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Spotted Wing Drosophila: Pest Management Recommendations for Southeastern Blueberries

EDIS ◽

10.32473/edis-in998-2013 ◽

2013 ◽

Vol 2013 (6) ◽

Author(s):

Oscar E. Liburd ◽

Lindsy E. Iglesias

Keyword(s):

United States ◽

Invasive Species ◽

East Asia ◽

Pest Management ◽

Host Plants ◽

Spotted Wing Drosophila ◽

Hillsborough County ◽

Fact Sheet ◽

Agriculture Industry ◽

Management Recommendations

The spotted wing drosophila is a recently discovered invasive species native to parts of East Asia. It was first detected in the continental United States in California in 2008 and in Hillsborough County, Florida in 2009. Since then, the spotted wing drosophila has spread to over 28 counties in Florida. SWD is polyphagous, meaning it feeds on many different host plants, including most thin-skinned fruits. The major hosts of concern to the Florida agriculture industry are blueberries, strawberries, blackberries and grapes. This 5-page fact sheet was written by Oscar E. Liburd and Lindsy E. Iglesias and published by the UF Department of Entomology and Nematology, June 2013. http://edis.ifas.ufl.edu/in998

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Development of spotted wing drosophila in fruits of two raspberry cultivars

Pomologia Croatica ◽

10.33128/pc.23.3-4.1 ◽

2020 ◽

Vol 23 (3-4) ◽

pp. 77-90

Author(s):

Ivana Pajač Živković ◽

Darija Lemić ◽

Boris Duralija ◽

Aleksandar Mešić ◽

Dana Čirjak

Keyword(s):

Risk Assessment ◽

Invasive Species ◽

Spotted Wing Drosophila ◽

Alien Invasive Species ◽

Economic Damage ◽

Drosophila Suzukii ◽

Greenhouse Production ◽

Soft Fruit ◽

Greenhouse Cultivation ◽

Soft Fruits

Spotted wing drosophila (Drosophila suzukii (Matsumura, 1931)) a polyphagous alien invasive species causes economic damages in cultivation of soft fruits all over the word. It is widespread in Croatia and considering that the economic damage occurred in greenhouse cultivation of soft fruit several years ago, new damage in this production can be expected. The pest development was monitored on 50 overripe fruits of cultivars 'Amira' and 'Sugana' cultivated in greenhouses in Zagreb in 2018 to investigate pest preference for these cultivars and to make a risk assessment in raspberry cultivation. Pest presence was recorded on both cultivars at the same time, and D. suzukii was dominant drosophilid species in development. Significantly more drosophilids as well as individuals of D. suzukii were developed on cultivar 'Amira'. On 'Amira' 373 female and 211 male of D. suzukii developed, while on 'Sugana' 253 female and 142 males developed. Average number of pests per fruit on 'Amira' counted 11.68 and on 'Sugana' 7.9. Drosophila suzukii develops in high populations in the greenhouse production of raspberry cultivars, which poses a serious risk for their cultivation in the study site.

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North American invasion of Spotted-Wing Drosophila (Drosophila suzukii): A mechanistic model of population dynamics

Ecological Modelling ◽

10.1016/j.ecolmodel.2016.05.014 ◽

2016 ◽

Vol 336 ◽

pp. 70-81 ◽

Cited By ~ 12

Author(s):

Aaron B. Langille ◽

Ellen M. Arteca ◽

Geraldine D. Ryan ◽

Lisa M. Emiljanowicz ◽

Jonathan A. Newman

Keyword(s):

Population Dynamics ◽

North American ◽

Mechanistic Model ◽

Spotted Wing Drosophila ◽

Drosophila Suzukii

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POPULATION DYNAMICS OF DROSOPHYLA SUZUKII (MATSAMURA) IN SWEET AND SOUR CHERRY ORCHARDS IN THE CENTRAL BALKANS MOUNTAIN

FRUIT GROWING RESEARCH ◽

10.33045/fgr.v37.2021.14 ◽

2021 ◽

Vol 37 (37) ◽

pp. 96-102

Author(s):

Petko Minkov ◽

◽

Nedyalka Palagacheva ◽

Vasiliy Dzhuvinov ◽

◽

...

Keyword(s):

Population Dynamics ◽

Red Wine ◽

Sweet Cherry ◽

Sour Cherry ◽

Spotted Wing Drosophila ◽

Drosophila Suzukii ◽

The Balkans ◽

Soft Fruits

The spotted wing drosophila (SWD) Drosophila suzukii, Matsumura is a polyphagous for many stone and soft fruits species. The pest was recorded in 2014 at sweet cherry orchards in our country and has become a real pest, because SWD attack the fruit when they start to ripe. During 2017-2019 the study was carried out in the Institute of Mountain Stockbreeding and Agriculture in Troyan – Central part of the Balkans Mountain. For monitoring were used traps with red wine and apple vinegar. The first flies at the sweet cherry were found during the second decade of May and in the sour cherry - a little later, at the beginning of June, when the fruit start to ripe. The peak of the population dynamics was established in the second half of June, after which the density began to decreasing. It was found that D. suzukii was preferred more the sweet cherry fruits than sour cherry fruits.

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