scholarly journals New finding sites of Drosophila suzukii (Matsumura, 1931) in perennial crops of Zagreb County

2019 ◽  
Vol 23 (1-2) ◽  
pp. 15-24
Author(s):  
Ivana Pajač Živković ◽  
Dora Kapuđija
Keyword(s):  
Invasive Species ◽  
Sex Ratio ◽  
Drosophila Suzukii ◽  
Perennial Crops ◽  
New Finding

The presence of invasive Drosophila suzukii (Matsumura, 1931) was investigated in three perennial crops (two orchards - Šurdovec and Donje Orešje and one vineyard - Donje Orešje) in the area of Zagreb county. Samples of D. suzukii were collected during the three-month period (from August 18th until November 18th, 2017) by using apple vinegar traps. The presence of D. suzukii was confirmed at all three investigated sites. In the orchard Šurdovec the lowest number (25 specimens) of D. suzukii was caught while the largest number (84 specimens) was caught in the orchard Donje Orešje. In all perennial crops D. suzukii was classified as eudominant species which implicates its invasive character. Sex ratio of D. suzukii at the orchard and vineyard Donje Orešje was female-biased while only in the orchard Šurdovec was male-biased which points to the further spread of the species in the area of Donje Orešje. The results of the research are a contribution to the knowledge of the distribution of this invasive species in the new areas of Zagreb County.

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

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.

scholarly journals The first registration of the wintering of invasive species of coccinellid Harmonia axyridis (Pallas, 1773) in the bee hives in Belarus

2020 ◽  
pp. 88-96
Author(s):  
Oksana Yu. Kruglova ◽  
Oleg V. Prischepchik
Keyword(s):  
Invasive Species ◽  
Sex Ratio ◽  
Harmonia Axyridis ◽  
Structural Features ◽  
Harmonia Axyridis Pallas

The first registration in Belarus of an invasive species of coccinellid Harmonia axyridis wintering in bee hives in the Galik village (Drogichinsky district, Brest region) has been established. Some structural features of the obtained sample of H. axyridis are analyzed. The sex ratio is closed to the theoretically expected (1 : 1) – 50.5 % of females and 49.5 % of males. Three of the four main phenotypic color classes of elytra are distinguished in imago – succinea, conspicua and spectabilis. The succinea phenotype is dominated with a frequency of 95.78 %. The elite crest was absent in 10 % of specimens.

scholarly journals Can exotic drosophilids share the same niche of the invasive Drosophila suzukii?

2019 ◽  
Vol 51 (1) ◽  
Author(s):  
N. Amiresmaeili ◽  
C. Jucker ◽  
S. Savoldelli ◽  
D. Lupi
Keyword(s):  
Sex Ratio ◽  
Northern Italy ◽  
Seasonal Occurrence ◽  
Drosophila Suzukii ◽  
Zaprionus Indianus ◽  
Apple Cider ◽  
Baited Traps ◽  
Chymomyza Amoena

The presence of the four exotic drosophilids Chymomyza amoena (Loew), Drosophila suzukii (Matsumura), Zaprionus indianus (Gupta) and Zaprionus tuberculatus Malloch has been investigated in different orchards in Northern Italy for two consecutive years. The presence and the abundance of the population of the drosophilid flies were surveyed with apple cider vinegar traps, fruit baited traps, and fruit collection. Chymomyza amoena, Z. tuberculatus and D. suzukii have been identified in the Apple Cider Vinegar traps in both years. Only D. suzukii and Z. tuberculatus emerged from fruit baited traps. Except for D. suzukii, no other exotic drosofilid was captured from the fruit collection. Z. indianus was never observed. Analyses of the presence of the different species, seasonal occurrence and sex ratio are provided.

scholarly journals Androgenesis: where males hijack eggs to clone themselves

2016 ◽  
Vol 371 (1706) ◽  
pp. 20150534 ◽  
Author(s):  
Tanja Schwander ◽  
Benjamin P. Oldroyd
Keyword(s):  
Invasive Species ◽  
Reproductive Success ◽  
Sex Ratio ◽  
Sexual Reproduction ◽  
Genetic Material ◽  
Male Gamete ◽  
Sole Source ◽  
Freshwater Clams ◽  
Biased Sex Ratio ◽  
Female Genome

Androgenesis is a form of quasi-sexual reproduction in which a male is the sole source of the nuclear genetic material in the embryo. Two types of androgenesis occur in nature. Under the first type, females produce eggs without a nucleus and the embryo develops from the male gamete following fertilization. Evolution of this type of androgenesis is poorly understood as the parent responsible for androgenesis (the mother) gains no benefit from it. Ultimate factors driving the evolution of the second type of androgenesis are better understood. In this case, a zygote is formed between a male and a female gamete, but the female genome is eliminated. When rare, androgenesis with genome elimination is favoured because an androgenesis-determining allele has twice the reproductive success of an allele that determines sexual reproduction. Paradoxically, except in hermaphrodites, a successful androgenetic strain can drive such a male-biased sex ratio that the population goes extinct. This likely explains why androgenesis with genome elimination appears to be rarer than androgenesis via non-nucleate eggs, although both forms are either very rare or remain largely undetected in nature. Nonetheless, some highly invasive species including ants and freshwater clams are androgenetic, for reasons that are largely unexplained. This article is part of the themed issue ‘Weird sex: the underappreciated diversity of sexual reproduction’.

scholarly journals Phenotypic and Transcriptomic Responses to Stress Differ According to Population Geography in an Invasive Species

2021 ◽  
Vol 13 (9) ◽  
Author(s):  
Pierre Marin ◽  
Angelo Jaquet ◽  
Justine Picarle ◽  
Marie Fablet ◽  
Vincent Merel ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
United States ◽  
Invasive Species ◽  
Environmental Changes ◽  
The United States ◽  
Short Time Scale ◽  
Environment Interaction ◽  
Rapid Adaptation ◽  
Drosophila Suzukii ◽  
The Impact

Abstract Adaptation to rapid environmental changes must occur within a short-time scale. In this context, studies of invasive species may provide insights into the underlying mechanisms of rapid adaptation as these species have repeatedly encountered and adapted to novel environmental conditions. We investigated how invasive and noninvasive genotypes of Drosophila suzukii deal with oxidative stress at the phenotypic and molecular levels. We also studied the impact of transposable element (TE) insertions on the gene expression in response to stress. Our results show that flies from invasive areas (France and the United States) live longer in natural conditions than the ones from native Japanese areas. As expected, lifespan for all genotypes was significantly reduced following exposure to paraquat, but this reduction varied among genotypes (genotype-by-environment interaction) with invasive genotypes appearing more affected by exposure than noninvasive ones. A transcriptomic analysis of genotypes upon paraquat treatment detected many genes differentially expressed (DE). Although a small core set of genes were DE in all genotypes following paraquat exposure, much of the response of each genotype was unique. Moreover, we showed that TEs were not activated after oxidative stress and DE genes were significantly depleted of TEs. In conclusion, it is likely that transcriptomic changes are involved in the rapid adaptation to local environments. We provide new evidence that in the decade since the invasion from Asia, the sampled genotypes in Europe and the United States of D. suzukii diverged from the ones from the native area regarding their phenotypic and genomic response to oxidative stress.

Temperature-induced phenotypic plasticity in the ovipositor of the invasive species Drosophila suzukii

2018 ◽  
Vol 75 ◽  
pp. 62-68 ◽  
Author(s):  
Maria Clemente ◽  
Giuseppe Fusco ◽  
Lorenzo Tonina ◽  
Folco Giomi
Keyword(s):  
Invasive Species ◽  
Phenotypic Plasticity ◽  
Drosophila Suzukii

scholarly journals All That Glitters Is Not Gold: The Other Insects That Fall into the Asian Yellow-Legged Hornet Vespa velutina ‘Specific’ Traps

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 448
Author(s):  
Omar Sánchez ◽  
Andrés Arias
Keyword(s):  
Invasive Species ◽  
Iberian Peninsula ◽  
Local Governments ◽  
Western Europe ◽  
First Record ◽  
Symbiotic Association ◽  
Drosophila Suzukii ◽  
Northern Spain ◽  
Economic Implications ◽  
Vespa Velutina

The introduction of invasive species is considered one of the major threats to the biodiversity conservation worldwide. In recent years, an Asian invasive species of wasp has set off alarms in Europe and elsewhere in the world, Vespa velutina. The Asian wasp was accidentally introduced in France around 2004 and shortly thereafter it was able to colonise practically all of Europe, including the Iberian Peninsula. The ecological and economic implications of V. velutina invasion and its high colonisation ability have triggered widespread trapping campaigns, usually supported by beekeepers and local governments, with the aim of diminishing its population and its negative impacts. Among the most used control methods are the capture traps, which use a sugary attractant to catch the invasive wasps. However, the species-specific selectivity and efficiency of these traps has been little studied. In this paper, we have analysed the specific identity of the unintentionally trapped insect species from northern Spain (covering one-year period), as well as we have assessed the provided ecosystem services by them. A total of 74 non-target taxa of insects were caught by the V. velutina studied traps, most of them correspond to the orders Diptera, Hymenoptera and Lepidoptera, the dipterans being the most abundant group. Surprisingly, the most abundant trapped species was the invasive fly, Drosophila suzukii that represented the 36.07% of the total catches. Furthermore, we reported the first record of ectoparasitic mites of the genus Varroa on V. velutina, constituting a newly recorded symbiotic association. Hopefully, the provided information helps to develop new protocols and management tools to control this invasive species in the Iberian Peninsula and other temperate areas of western Europe and the Mediterranean basin.

scholarly journals Factors affecting the biology of Pachycrepoideus vindemmiae (Hymenoptera: Pteromalidae) on spotted-wing drosophila (Drosophila suzukii)

2019 ◽  
Author(s):  
Cherre S. Bezerra Da Silva ◽  
Briana E. Price ◽  
Alexander Soohoo-Hui ◽  
Vaughn M. Walton
Keyword(s):  
Sex Ratio ◽  
Spotted Wing Drosophila ◽  
Host Feeding ◽  
Drosophila Suzukii ◽  
Factors Affecting ◽  
Intrinsic Factors ◽  
Young Females ◽  
Biocontrol Potential ◽  
Host Killing ◽  
The Impact

AbstractPachycrepoideus vindemmiae is a parasitoid of the invasive spotted-wing drosophila (SWD, Drosophila suzukii) in the U.S. Few studies have addressed interactions between these two species and little is known about the potential of this parasitoid as a biocontrol agent of SWD. Here, we investigated the impact of extrinsic and intrinsic factors on life-history traits of P. vindemmiae. Both constant (entire adulthood) and limited (30 minutes) supply of water + honey, honey, or host increased parasitoid survival compared to controls (water or fasting). Water + honey caused the highest parasitoid survivals (35-60 days), independent of supply period, sex, and host availability. Females were intrinsically more resistant to water and honey scarcity than males, and host-feeding elevated such resistance even higher. Constant supply of honey supported the highest host-killing capacity (ca. 600 SWD pupae/wasp). However, in young females (4-9 days old), such honey effect was insignificant while water deprivation (either with or without honey) resulted in the highest host-killing potential. This indicate that although sugar becomes a critical nutritional resource as females age, young females depend more on water than sugar. No effect of water nor honey was observed on the sex ratio of young females, but when we considered the entire adulthood honey supply produced the lowest proportion of females (0.50), independent of water availability. Such reduction derived from sperm depletion, likely caused by both lack of re-mating and higher fecundity in honey-fed wasps. Neither water nor honey affected parasitoid emergence rate (0.97), independent of female age. Based on survival and host-killing capacity, we conclude that P. vindemmiae has a tremendous biocontrol potential against SWD. Both limited and constant supply of water, sugar, and host increase parasitoid survival, while constant supply of water and/or honey enhance its host-killing potential and decrease sex ratio depending on mother age.

scholarly journals First occurrence of Drosophila suzukii in the Sauternes vineyards

OENO One ◽  
2012 ◽  
Vol 46 (2) ◽  
pp. 145 ◽  
Author(s):  
Raphaël Rouzes ◽  
Lionel Delbac ◽  
Marie-Laure Ravidat ◽  
Denis Thiéry
Keyword(s):  
Invasive Species ◽  
Population Monitoring ◽  
Fruit Fly ◽  
Harvest Time ◽  
Drosophila Suzukii ◽  
First Occurrence ◽  
Potential Pest

<p style="text-align: justify;"><strong>Aim</strong>: The present work reports the detection of a new fruit fly species in Sauternes vineyards (Aquitaine region, France): <em>Drosophila suzukii</em>.</p><p style="text-align: justify;"><strong>Methods and results</strong>: <em>Drosophila</em> were collected in two Sauternes vineyards, at the beginning of the harvest time in 2011, using food traps with apple molasses baits. The surveys led to the detection of the invasive species <em>D. suzukii</em>. In addition, rotting bunches were randomly taken in each vineyard but no <em>D. suzukii</em> emerged from them. The Drosophila community found in traps and on bunches was dominated by D.melanogaster.</p><p style="text-align: justify;"><strong>Conclusion</strong>: <em>D. suzukii</em>, although present in the vineyard agroecosystem of Sauternes, did not cause any noticeable damage in 2011. However, population monitoring should be continued.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: This first occurrence report of the invasive species <em>D. suzukii</em> in the Bordeaux vineyard should motivate further surveys of this potential pest of green berries.</p>

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