Postharvest Burial of Drosophila suzukii (Diptera: Drosophilidae) Infested Fruit Waste Reduces Adult Emergence

2019 ◽  
Vol 49 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Holly Hooper ◽  
Matthew J Grieshop
Keyword(s):  
Chemical Control ◽  
Negative Impact ◽  
Adult Emergence ◽  
The United States ◽  
Spotted Wing Drosophila ◽  
Burial Depth ◽  
Lipid Concentration ◽  
Drosophila Suzukii ◽  
Fruit Waste ◽  
Fruit Wastes

Abstract The arrival of spotted wing Drosophila, Drosophila suzukii (Matsumura), to the United States has caused many berry and cherry growers to replace IPM programs with calendar-based broad-spectrum insecticide programs. Alternative management tactics are urgently needed to mitigate the current dependency on chemical control. Postharvest burial is a cultural crop sanitation strategy that has the potential to reduce D. suzukii reproductive habitat and eliminate infested fruit wastes. This study revealed that D. suzukii rarely pupate on the soil’s surface or below 1 cm, but are capable of unburying themselves from depths up to 48 cm. Although zero emergence was not obtained in the field, adult emergence decreased exponentially with deeper burial depths. A burial depth of 24 cm reduced D. suzukii emergence by 97%, although soil texture may influence this optimal burial depth. Soils that had a higher concentration of sand had a negative impact on D. suzukii survival at shallower burial depths. The mechanism behind the reduction in adult emergence from differing burial depths remains unclear as the lipid concentration between emerging D. suzukii was the same regardless of burial depth.

scholarly journals Octabor (boron) as a Low Toxicity Control Tactic for the Spotted Wing Drosophila, Drosophila suzukii (Matsumura)

2018 ◽  
Vol 5 (4) ◽  
pp. 63
Author(s):  
Troy Cloutier ◽  
Francis Andrew Drummond ◽  
Judith Collins
Keyword(s):  
Field Study ◽  
The United States ◽  
Fruit Production ◽  
Spotted Wing Drosophila ◽  
Drosophila Suzukii ◽  
Delayed Effect ◽  
Control Fruit ◽  
Small Fruit ◽  
Sugar Addition ◽  
Wild Blueberry

The recently introduced spotted wing drosophila is one of the most serious pests in small fruit production in the United States and Europe. Most control relies upon multiple applications of synthetic insecticides. In an effort to find less-toxic insecticides to consumers, farm workers, and wildlife, we conducted two laboratory trials and a semi-field trial in order to assess the potential for disodium octaborate tetrahydrateformulated and sold as Octabor®(U.S. Borax, Inc.) as a control for spotted wing drosophila in wild blueberry. We found that Octabor at 0.6 and 1.0% (w/v) applied to wild blueberry fruit resulted in higher mortality of flies than non-treated control fruit. Addition of sugar to Octabor enhanced mortality in one of the two trials, with an interaction between sugar addition and Octabor rate suggesting that the addition of sugar provided the greatest enhancement at the low rate. Our semi-field study showed that an apparent repellency effect of Octabor provided protection of fruit from infestation for up to 3 days. Also in the semi-field study, we observed a delayed effect on fly mortality. Increased fly mortality occurred over time, relative to the non-treated control fruit. The greatest fly mortality, relative to the non-treated control, resulted from flies being exposed to fruit treated 3 and 7 days prior to fly exposure, but not immediately after the treatment of Octabor. We speculate on why this type of delay in mortality might have occurred.    

Oviposition Preference and Larval Performance of Drosophila suzukii (Diptera: Drosophilidae), Spotted-Wing Drosophila: Effects of Fruit Identity and Composition

2019 ◽  
Vol 48 (4) ◽  
pp. 867-881 ◽  
Author(s):  
Laure Olazcuaga ◽  
Nicolas O Rode ◽  
Julien Foucaud ◽  
Benoit Facon ◽  
Virginie Ravigné ◽  
...  
Keyword(s):  
Emerging Adults ◽  
Oviposition Behavior ◽  
Oviposition Preference ◽  
Adult Emergence ◽  
Spotted Wing Drosophila ◽  
Larval Performance ◽  
Drosophila Suzukii ◽  
Management Tools ◽  
Factors Affecting ◽  
And Performance

Abstract A better understanding of the factors affecting host plant use by spotted-wing drosophila (Drosophila suzukii) could aid in the development of efficient management tools and practices to control this pest. Here, proxies of both preference (maternal oviposition behavior) and performance (adult emergence) were evaluated for 12 different fruits in the form of purees. The effect of the chemical composition of the fruits on preference and performance traits was then estimated. We synthesized the literature to interpret our findings in the light of previous studies that measured oviposition preference and larval performance of D. suzukii. We show that fruit identity influences different parts of the life cycle, including oviposition preference under both choice and no-choice conditions, emergence rate, development time, and number of emerging adults. Blackcurrant was always among the most preferred fruit we used, while grape and tomato were the least preferred fruits. Larvae performed better in cranberry, raspberry, strawberry, and cherry than in the other fruits tested. We found that fruit chemical compounds can explain part of the effect of fruit on D. suzukii traits. In particular, oviposition preference under choice conditions was strongly influenced by fruit phosphorus content. In general, the consensus across studies is that raspberry, blackberry, and strawberry are among the best hosts while blackcurrant, grape and rose hips are poor hosts. Our results generally confirm this view but also suggest that oviposition preferences do not necessarily match larval performances. We discuss opportunities to use our results to develop new approaches for pest management.

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

2019 ◽  
Vol 112 (5) ◽  
pp. 2287-2294 ◽  
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.

scholarly journals The Economic Impacts and Management of Spotted Wing Drosophila (Drosophila Suzukii): The Case of Wild Blueberries in Maine

2020 ◽  
Vol 113 (3) ◽  
pp. 1262-1269 ◽  
Author(s):  
D Adeline Yeh ◽  
Francis A Drummond ◽  
Miguel I Gómez ◽  
Xiaoli Fan
Keyword(s):  
Economic Impacts ◽  
The United States ◽  
Spotted Wing Drosophila ◽  
Yield Reduction ◽  
Drosophila Suzukii ◽  
Case Scenario ◽  
Worst Case ◽  
Risk Scenarios ◽  
Wild Blueberry ◽  
Early Harvest

Abstract Drosophila suzukii (Matsumura), or spotted wing drosophila, has become a major pest concern for berry growers in the United States. In this study, we evaluated the economic impacts of D. suzukii on the Maine wild blueberry industry from two perspectives. The first analysis estimated the state-level economic impacts of D. suzukii on the wild blueberry industry in Maine in the absence of control. We found that D. suzukii could result in drastic revenue losses to the industry, which could be over $6.8 million under the worst-case scenario (assuming a 30% yield reduction). In the second analysis, we used Monte Carlo simulation to compare the expected revenues under different management strategies for a typical wild blueberry farm in Maine. The analysis focused on a decision-making week during the harvesting season, which the grower can choose in between three control strategies: no-control, early harvest, or insecticide application. The results suggested that insecticide applications are not economically optimal in most low infestation risk scenarios. Furthermore, although the early harvest strategy is one of the strategies to avoid D. suzukii infestations for wild blueberry production in Maine, the tradeoff is the revenue loss from the unripe crop. Using the simulation results, we summarized optimal harvest timing regarding the fruit maturity level under different D. suzukii infestation risk scenarios, which can minimize the revenue loss from adopting the early harvest management strategy.

Health Communication: Implications for Diverse Populations

2011 ◽  
Vol 18 (1) ◽  
pp. 12-19
Author(s):  
Amy Hasselkus
Keyword(s):  
Health Care ◽  
Health Communication ◽  
Negative Impact ◽  
Linguistically Diverse ◽  
Good Health ◽  
The United States ◽  
Poor Health ◽  
Health Care Decisions ◽  
Diverse Backgrounds ◽  
Health Related

The need for improved communication about health-related topics is evident in statistics about the health literacy of adults living in the United States. The negative impact of poor health communication is huge, resulting in poor health outcomes, health disparities, and high health care costs. The importance of good health communication is relevant to all patient populations, including those from culturally and linguistically diverse backgrounds. Efforts are underway at all levels, from individual professionals to the federal government, to improve the information patients receive so that they can make appropriate health care decisions. This article describes these efforts and discusses how speech-language pathologists and audiologists may be impacted.

Effects of insecticides on adults and eggs of Drosophila suzukii (Diptera, Drosophilidae)

2017 ◽  
Vol 43 (2) ◽  
pp. 208 ◽  
Author(s):  
Daniele Cristine Hoffmann Schlesener ◽  
Jutiane Wollmann ◽  
Juliano De Bastos Pazini ◽  
Anderson Dionei Grützmacher ◽  
Flávio Roberto Mello Garcia
Keyword(s):  
North America ◽  
South America ◽  
Chemical Control ◽  
Stone Fruits ◽  
Drosophila Suzukii ◽  
Ovicidal Effect ◽  
Mere Presence ◽  
South Of Brazil ◽  
Different Cultures ◽  
First Time

Drosophila suzukii (Diptera, Drosophilidae) is an exotic species, endemic to Asia and currently a pest to small and stone fruits in several countries of North America and Europe. It was detected in 2013 for the first time in South America, in the south of Brazil. Unlike most drosophilids, this species deserves special attention, because the females are capable of oviposit inside healthy fruits, rendering their sale and export prohibited. Despite the confirmed existence of this species in different states of Brazil, this insect is yet been to be given the pest status. Nevertheless, the mere presence of this species is enough to cause concern to producers of small fruits and to justify further investigation for it’s control, especially chemical control for a possible change in status. Therefore, the goal of this work was to evaluate, in laboratory, mortality of D. suzukii adults and ovicidal effect when exposed to different insecticides registered for species of the Tephritidae and Agromyzidae families in different cultures. The insecticides deltamethrin, dimethoate, spinosad, fenitrothion, phosmet, malathion, methidathion, and zeta-cypermethrin resulted in mortality to 100 % of the subjects three days after the treatment (DAT). Regarding the effects over eggs, it was  established that the insecticides fenitrothion, malathion, and methidathion deemed 100 % of the eggs not viable, followed by phosmet and diflubenzuron, which also caused elevated reduction in the eclosion of larvae two DAT.

Mobilized by Injustice

2020 ◽  
Author(s):  
Hannah L. Walker
Keyword(s):  
New York ◽  
Criminal Justice ◽  
Civil Rights ◽  
Political Action ◽  
Negative Impact ◽  
The United States ◽  
Personal Contact ◽  
Racial Boundaries ◽  
Material Resources ◽  
Depth Interviews

Springing from decades of abuse by law enforcement and an excessive criminal justice system, members of over-policed communities lead the current movement for civil rights in the United States. Activated by injustice, individuals protested police brutality in Ferguson, campaigned to end stop-and-frisk in New York City, and advocated for restorative justice in Washington, D.C. Yet, scholars focused on the negative impact of punitive policy on material resources, and trust in government did not predict these pockets of resistance, arguing instead that marginalizing and demeaning policy teaches individuals to acquiesce and withdraw. Mobilized by Injustice excavates conditions under which, despite otherwise negative outcomes, negative criminal justice experiences catalyze political action. This book argues that when understood as resulting from a system that targets people based on race, class, or other group identifiers, contact can politically mobilize. Negative experiences with democratic institutions predicated on equality under the law, when connected to a larger, group-based struggle, can provoke action from anger. Evidence from several surveys and in-depth interviews reveals that mobilization as result of negative criminal justice experiences is broad, crosses racial boundaries, and extends to the loved ones of custodial citizens. When over half of Blacks and Latinos and a plurality of Whites know someone with personal contact, the mobilizing effect of a sense of injustice promises to have important consequences for American politics.

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