Special Event Permit Detail

Application Information

ID: 3440   Event: Spotted Winged Drosophila
Application Date: 06/12/2018    Event Date: 07/02/2018   Thru: 11/15/2020
Organization: Colorado State University   Phone: 9704916945
Address: Department of Bioag Sciences and Pest Management
Contact 1 Name: Ruth Hufbauer
Address: 1177 Campus Delivery
Email: Send email
Contact 2 Name:


Event Information

Permit Type(s): Parks and Open Spaces
Type of Event: Research
Devil's Backbone Open Space,Hermit Park Open Space,Horsetooth Mountain Open Space,Other Larimer County Open Spaces

Drosophila suzukii (spotted winged Drosophila, or SWD) is an invasive fly that has become a major pest of small fruits (e.g. strawberries, raspberries, cherries) since it invaded the US in 2008. It recently was discovered to attack small fruits in natural areas as well, including wild plums, serviceberry, currants, and other small fruits. Fruiting shrubs and tress are a key part of natural habitats, supporting frugivorous birds and mammals by providing both habitat and food sources. If spotted wing Drosophila reduces the ability of shrubs to reproduce, and thus reduces their long-term abundance, or if it reduces the availability or value of fruits as a food source to birds and other animals, then an important link in the food web would be weakened. It is crucial to understand the consequences of this invasive species for natural systems, to better mitigate potential cascading effects.

Sampling plan:
The first step in understanding the effects of this invasive fly is to sample fruits from shrubs and trees throughout the season to determine how abundant it is, and if there are particular plants or locations that are more susceptible to attack than others. We would sample 10-20 fruits per plant, focusing on 3-6 individuals per fruiting species, and aiming for 5-10 different sites (some on Larimer County open space, others elsewhere). Samples will be collected every week from the beginning of fruit ripening through the end of the fruiting season (approximately July through October to capture all species). The dates and times above are approximate, and aim to demonstrate morning hours, once/week.

Focusing on Prunus species (wild plum and chokecherry), we will also observe bird feeding, to estimate the extent of frugivory.

Experimental plan:
To evaluate the individual and joint effects of attack by D. suzukii and bird frugivory we will (pending permission, of course!) experimentally manipulate access to shrubs, again focusing on Prunus species. The experiment will be a factorial manipulation of insecticides to exclude insects and netting to exclude birds. The insecticide would be either a soak or preferably an injections (like for emerald ash borer) to avoid drift of insecticide, and minimize non-target effects. We will aim to run this at a single site (for feasibility) with an ideal of 10 replicates of each treatment. We will sample a small subset of fruits off the plants to determine spotted wing Drosophila attack rates and effectiveness of insecticide controls. We will then record timing of fruit ripening, timing of fruit drop, status of fruit at drop (ripe or unripe).

We will analyze timing of fruit ripening and drop, and density of dropped fruits, with predictors being the two treatments (netting/no netting and insecticide/no insecticide) and their interaction.

If the use of insecticides and netting is something that can be done, we would like to set this experiment up this summer (2018) if possible. I realize, however, that this request is late (we only just got funding for the project) and so that it may not be feasible to find a suitable site at this date. Also, we would be happy to develop an educational poster about the invader and, eventually, our findings if that would be of interest.

One graduate student, three CSU faculty (Ruth Hufbauer, Liba Goldstein, Cameron Ghalambor) and one USGS scientist (Ian Pearse) will be involved in this project, with occasional undergraduate helpers in the field. Ruth and Ian are entomologists who work on plants and insects, Liba and Cameron have a tremendous amount of expertise with birds.

Estimated Participants: 5   Estimated Spectators: 0

Food / Alcohol:
  Food is NOT being Served.
 Alcohol is NOT being Served

   Mon. 07/02/2018: 8 AM - 12 PM
   Tue. 07/03/2018: 8 AM - 12 PM
   Wed. 07/04/2018: 8 AM - 12 PM
   Thu. 07/05/2018: 8 AM - 12 PM
   Fri. 07/06/2018: 8 AM - 12 PM
   Sat. 07/07/2018: 8 AM - 12 PM
   Sun. 07/08/2018: 8 AM - 12 PM


Additional Information Submitted by Applicant

1. Date Submitted: 06/20/2018
Dear Larimer County folks -
It seems like, for CSU to provide a certificate of insurance, there is a form to fill out to provide some basic information. I've attached it below.

My main questions for you is what kind of coverage should I request (general liability?)
Thank you!

2. Date Submitted: 06/20/2018
Thanks so much for the quick reply to my question. I also asked a question of CSU folks at the same time, and they said that we already have a certificate for Larimer County that might work. Please see the attached. Is this acceptable? Just let me know. Thanks again so much.

Reviewing Agency Comments/Status

Email the Special Events Coordinator regarding this application.

Parks & Open Lands

Status: More Information Needed


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Risk Management

Status: Approved

Comments: 6/20/18 The attached certificate of Insurance does fill the requirements however it expires on 8/1/2018, the requested duration of this application is 7/2/18-11/15/2020. Please forward all renewal certificates during this time to Risk@larimer.org and note Special Event Application 3440 on certificate.
Thank you
Answer to 6/20/18 question re: CSU certificate request form:
- Certificate holder: Larimer County Risk Management Attention Risk Management 200 W Oak St Suite 4000 Fort Collins, CO 80525;
- General Liability limits no less than $1,000,000 per occurrence / $2,000,000 general aggregate
- Larimer County as additional insured

Please provide a certificate of insurance with general liability limits no less than $1,000,000 per occurrence / $2,000,000 general aggregate.

Thank you.

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