Browsing by Subject "Drosophila suzukii"

Now showing 1 - 8 of 8
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    Data supporting: Comparing Drosophila suzukii flight behavior using free-flight and tethered flight assays
    (2022-05-02) Kees, Aubree M; Tran, Anh K; Hutchison, William D; Aukema, Brian H; Rao, Sujaya; Rogers, Mary A; Asplen, Mark A; aktran@umn.edu; Tran, Anh K; University of Minnesota Department of Entomology; University of Minnesota Department of Horticultural Science; Metropolitan State University Department of Natural Sciences
    Winter and summer morph Drosophila suzukii flight behavior on a tethered flight mill and free flight chamber was documented. The purpose of this data were to document the limitations, benefits, and effects the two methods could have on assessing an insect’s flight capacity.
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    Episode 4 Spotted Wing Drosophila Part 1: Dr. Mary Rogers on Keeping Out SWD: What's Killing My Kale?
    (2018-06) Klodd, Annie; Hoidal, Natalie; Rogers, Mary
    This month's episodes of "What's Killing My Kale?" focus on Spotted Wing Drosophila. This invasive vinegar fly, now widespread in Minnesota, is a major concern for small fruit growers as it lays its eggs directly in the flesh of many high value fruits. This series of podcasts provides growers with top recommendations on managing SWD from Mary Rogers, Assistant Professor of Horticulture, Jim Riddle, long-time organic fruit grower and owner of Blue Fruit Farm, and Bill Hutchison, UMN Extension Entomologist. Additional information on SWD can be found at https://www.fruitedge.umn.edu/swd.
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    Episode 5 (Season 3) The Economic Impact of SWD on the Minnesota Berry Industry: What's Killing My Kale?
    (2020-04-10) Klodd, Annie; Hoidal, Natalie; Digiacomo, Gigi
    Annie talked with Gigi Digiacomo, a research fellow in the Department of Applied Economics. They discussed Digiacomo's recent findings about how spotted wing Drosophila (SWD) has impacted the Minnesota berry industry, and weighed the economics of SWD management strategies.
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    Episode 5 Spotted Wing Drosophila Part 2: A Chat with Jim Riddle of Blue Fruit Farm: What's Killing My Kale?
    (2018-06) Klodd, Annie; Hoidal, Natalie; Riddle, Jim
    This month's episodes of "What's Killing My Kale?" focus on Spotted Wing Drosophila. This invasive vinegar fly, now widespread in Minnesota, is a major concern for small fruit growers as it lays its eggs directly in the flesh of many high value fruits. This series of podcasts provides growers with top recommendations on managing SWD from Mary Rogers, Assistant Professor of Horticulture, Jim Riddle, long-time organic fruit grower and owner of Blue Fruit Farm, and Bill Hutchison, UMN Extension Entomologist. Additional information on SWD can be found at https://www.fruitedge.umn.edu/swd.
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    Episode 6 (Season 3) Organic Management of SWD: What's Killing My Kale?
    (2020-04-10) Klodd, Annie; Hoidal, Natalie; Rogers, Mary
    Annie talked with Dr. Mary Rogers, an Assistant Professor studying organic food production systems in the Department of Horticulture. They discussed recent research findings from Dr. Rogers team, as well as other farms and researchers around the country, about the best ways to manage SWD organically. 
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    Evaluating Host Plant use by Spotted Wing Drosophila, Drosophila suzukii, in Minnesota.
    (2017-05) Sward, Grace
    Spotted wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae), is newly established in North America and become one of the most devastating pests for small fruit crops. With a broad host range, thin-skinned berries are particularly susceptible to infestation, and fruit producers are desperate for methods to control this pest. One of the keys to developing an integrated management program for SWD is to understand host preference, varietal susceptibility of crop hosts, and overall susceptibility and use of non-crop hosts. In this thesis, the infestations levels and host plant growth stages were recorded over time during growing seasons of one day in 2014, and various sampling dates in 2015 and 2016 in Minnesota. Both crop and non-crop host plants were examined for their phenological and overall susceptibility. The first research chapter was performed working in replicated small plots, experiments were conducted to evaluate differences in varietal susceptibility on cold hardy red primocane fruiting raspberries. Significant differences were observed in both the level of infestation and in the average number of larvae per berry by variety. In addition, it appears that there is a significant negative correlation between the level of infestation and the number of larvae per fruit with the time of sampling, but only an interaction of variety and time for the number of larvae per berry. The second research chapter was performed using nine field sites of either farm or non-farm wild locations separated by a minimum of 400 meters. Crop hosts: raspberry, blueberry, and elderberry, as well as non-crop host plants were examined and sampled for fruit ripening stages an infestation rates. Significant differences were observed in infestations within non-crop host plants and crop host plants. Crop hosts sustained infestations starting in the green phenological stage. These data provide a better understanding of the biology and ecology of this pest which is critical in refining current management practices. Knowledge of these interactions can aid in optimizing control strategies such as fine-tuning spatial and temporal control measures, which may be particularly important for early season infestations.
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    Morphometric Measurements of Field and Laboratory-Reared Spotted-Wing Drosophila (2017-2018)
    (2019-12-18) Tran, Anh K.; Hutchison, W. D.; Asplen, Mark K.; aktran@umn.edu; Tran, Anh
    Winter and summer morph Drosophila suzukii can be difficult to distinguished based on a color scale. The purpose of this data were to find an alternative, quantitative method for identifying the two morphs using wing and/or hind tibia measurements.
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    Spotted-wing Drosophila: Investigating the Efficacy of Innovative and Alternative Management Techniques
    (2020-01) Gullickson, Matthew
    Spotted-wing drosophila (Drosophila suzukii; SWD) established recently in North America as an invasive insect pest of small and soft skinned fruit, responsible for significant economic losses nationwide and locally in Minnesota. Female SWD use a heavily sclerotized and serrated ovipositor to deposit eggs in ripening and ripe fruit. Larvae then emerge and develop within the flesh which results in unmarketable fruit at harvest. Consequently, there is a zero-tolerance threshold for larvae in fresh fruit. Current management strategies are often limited to regular applications of broad- spectrum insecticides, primarily organophosphates, spinosads, and pyrethroids. Weekly sprays may have deleterious ecological impacts to beneficial, non-target species including pollinators. Additionally, frequent spraying can contribute to insecticide resistance and may even fail to adequately protect fruit from infestation. Organic pesticide application for SWD management is particularly difficult for growers due to fewer chemical options and increased cost compared to conventional products. Since the arrival of SWD and the subsequent increase of insecticidal sprays, it has been a significant challenge for producers to balance economics as well as pest and pollinator management goals. Weekly conventional insecticide rotations in primocane raspberries can still result in widespread infestation likely due to high SWD populations, immigration by new individuals, and/or inadequate spray penetration in the dense plant canopy. Frequent applications of broad spectrum insecticides continues to be the most prevalent management strategy, but pesticide resistance is a concern. Resistance has already been reported for one of the only effective insecticides labeled for organic production systems, underscoring the need to diversify management strategies. Responding to the critical need for additional management tools and chemical alternatives, the goal of this research was to investigate the efficacy of novel chemical controls and physical exclusion on SWD in primocane raspberry fruit. For our first set of experiments, we conducted a series of laboratory bioassays to test twenty-five potential pesticide treatments. We measured the effects of these treatments on SWD adult mortality, oviposition, larval and pupal development, and adult emergence. This information was used to guide a follow up study testing thirteen of the most promising treatments on SWD mortality and infestation in the field. Results showed that the broad spectrum conventional and organic controls provided the best SWD control, however botanical products provided some protection against infestation. Additionally, there is increasing interest in using physical exclusion and high tunnel production as a pest management tool, particularly since many growers already use high tunnels for season extension and improved fruit quality. Our second set of experiments investigated how plastic-covered, enclosed tunnels affected fruit yield and quality, as well as SWD infestation. We collected data on yield, proportion of marketable and unmarketable fruit, berry size, total soluble solids (°Brix), proportion of infested fruit, and the microclimate characteristics inside of the plots. The objective of these experiments was to improve integrated pest management strategies for SWD and provide recommendations for both organic and conventional growers for sustainable management of this invasive pest.