Tree Fruit Research & Extension Center

Insect Ecology & Behavior Laboratory

Vince Jones' Research

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2008 Web Survey

DAS users were asked to complete a short survey at the beginning of the 2008 orchard season. The survey was broken up into three sections: 1. User Description (9 Qs); 2. Orchard Information (8 Qs); 3. WSU-DAS Specific Questions (25 Qs). Most questions were check box type answers to select a particular item (s) or rate something on a 5 point scale. There were a few fill in the blank type questions, such as number of weather stations used. And there were two optional opinion text boxes. Everyone was asked to answer Sections 1 and 2. If users were returning from the previous season, they were asked to complete Section 3 after finishing the first two sections. New users were only asked to complete Sections 1 and 2 inititially, but were asked to complete the final section after they had used DAS for a short time.

The graphs below depict the summary results of this survey. If you would like copies of the survey, the analysis or the summary results you may download the files by clicking on the following links:

WSU-DAS Survey Questions

Analysis of Sections 1&2

Analysis of Section 3

Survey Summary Results

Sections 1&2 Summary Results

Section 2 Summary Results

2010 Web Survey
download PDF Summary
Contents: Survey Methods Background /

Use of DAS

Impact of DAS

User Feedback

Future of DAS


Survey Methods

An online survey of WSU-DAS users was conducted from July through September 2010. Of all registered DAS users, 154 participants responded to our survey and 134 participants completed all questions. The response rate was 34.4% based on 447 users that logged in at least 3 times in 2010. Some graphs presented here show comparative results for the 2008 and 2010 surveys when data for both years exist.

User background/demographics

Most respondents were between 50 and 59 years of age (44%), 23% were 40-49 years old, and 20% were 60+ years of age. Ninety-two percent were male, and 7% were female. Spanish was the first language of 3% respondents, English for 96%. The majority (66%) of respondents have a 4-year degree or higher, followed by some college (16%), a 2-year degree (11%), high school/GED (4%), and trade school (3%).

user age user gender
user language used education


Nearly three quarters (73%) of respondents describe themselves as average computer user, 17% as computer experts (compared to 11% in 2008), and 10% as novice. Desktop and laptop computers are used by 82% and 77% of the survey respondents, respectively. The use of smart phones/PDA’s has more than doubled from 20% in 2008 to 45% in 2010.

user computer expertice user computer experience
user computer type users operating system
Computer used for DAS


The majority of the survey respondents (61%) were growers/orchardists, 38% were orchard managers, 20% worked as Ag Chem distributor consultants, 16% were Packinghouse or Company fieldmen, 14% worked in research and/or extension, 10% were private crop consultants, and 9% had other full-time or part-time occupations.

user occupations

Over a quarter (26.8%) of the survey respondents also participated in the 2008 survey. The survey respondents comprised experienced as well as new DAS users; 15% registered with DAS in 2010, 25% in 2009, 32% in 2008, and 28% in 2007.

Survey 2008 participant year began using DAS


The majority of respondents learned about DAS through grower meetings (58%), followed by PMTP meetings (32%), Good Fruit Grower articles (27%), friends/colleagues (25%), employer/supervisor (17%), internet links/search engine (12%), and/or other sources (14%).

How users heard of DAS
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Orchard characteristics

The survey respondents from WA State provided pest control management or recommendations for a total of approximately 182,044 acres (ranging from 0 to 75,000 acres) in 2,909 orchards (ranging from 0 to 1,400 orchards). Of the respondents from WA State that provided management or recommendations, 92% did so for apples, 63% for pears, 69% for cherries, 32% for other stone fruit, and 11% for other crops including grapes and other small fruit. The majority of survey respondents described their management practice as conventional (82%), followed by organic (39%), non-OP (35%), and other (6%).

acreage number of orchards
users crops user management practices
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Use of DAS

Ease of use of DAS features: Most respondents rated the use of various features of DAS as “easy” or “very easy.” Between 6% and 27% of users indicated that they were not aware of the some of the DAS features. The respondents rated the various insect, disease and disorder models as “easy” or “very easy” to use.

ease of use - set up
features ease of use

Usefulness of DAS features: Survey respondents rated various features on DAS on average between ”somewhat useful” and “very useful.” Best average ratings were given to projected model forecast with management recommendations, model charts, and the overall full WSU Spray Guide. New features, such as video tutorials, online manual, front page stories, and iPhone version were rated on average ”somewhat useful.”

usefullness of features


Crops used in DAS:  All crops were used in DAS by the survey respondents, most importantly apple (92%), followed by cherry (71%), pear (62%), and other stone fruit (34%).

crops used in DAS


Models used in DAS: The most used models on DAS were codling moth (93%), fireblight (80%), western cherry fruit fly (65%), oblique-banded leafroller (64%), cherry powdery mildew (59%), and Pandemis leafroller (55%). For 62% of the survey respondents, the codling moth model was the most important model, while the fireblight model and western cherry fruit fly model were most important for 22% and 5% of the respondents, respectively.

models used in DAS


Number of AWN stations: The number of AgWeatherNet stations used in DAS per user ranges between 1 and 134. The majority of respondents (77%) looked at 1 to 5 weather stations.

stations per user distance from AWN station


Use of Custom Weather Stations. DAS allows users to upload and use weather data from their own stations. About 28% of the respondents idicated that they had their own weathter data. Respodents were then asked to rate the level of ease or difficulty in setting up their own stations within DAS.

own station ease of setting up custom station
ease of use of models - custom station


Use of DAS. The majority of DAS users check their stations and models between once per week up to 4 to 6 times a week. When asked how sharing DAS information, the majority (68%) reported that the information is mostly for themselves, but they also share it with others.

frequency of use use of DAS information


DAS support: Almost half of the survey participants (46%) have requested any kind of support from the DAS team and rated the responsiveness, helpfulness, and friendliness as “good” or “excellent.”

DAS support request
DAS support ratings
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Impact of DAS

Almost half of the respondents (48%) said they were asked for information from DAS, and 81% of all respondents shared the information with others.

The use of DAS resulted in an increase in the level of pest control for 56% of the respondents, reduced number of sprays (36%), reduced cost for pest management (31%). DAS helped 97% of the survey respondents to “some extent” or a “very great extent” with clarifying treatment timings, 68% with choosing chemicals for best efficacy, and 65% with clarifying management for multiple pests.

sharing DAS information

DAS impact on management

In addition, 86% of the survey participants indicated that DAS helped with improving the their overall management strategy, with providing general information on IPM (86%), and with choosing chemicals to reduce natural enemy mortality (60%).

how DAS helped

A comparison was then made between 2008 and 2010 for those stating the DAS was helpful in the various processes showing an overall increase in DAS usefullness.

comparison how DAS helped

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User Feedback

Of the 66% of the respondents who would like to learn more about DAS, 63% would prefer newsletters and updates on the DAS front page, 53% online video tutorials and manual, 42% grower meetings, and 39% workshops. Other suggestions included online workshops and interactive online training. Ten percent of the respondents were interested in using DAS in Spanish.

additional training
DAS translation future models
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Future of WSU-DAS

Maintenance of WSU-DAS costs approximately $200,000 per year. Currently, WSU-DAS is funded mainly by WA Tree Fruit Research Commission grants, but the mission of WTFRC is not meant to support/ maintain long-term projects. In light of this, users were asked if they thought WSU-DAS should continue in the future and how it should be supported.

DAS future

who should pay for DAS

Respondents were then asked if WSU-DAS were forced to institute a user fee, what unit of measure should the fee be based on? Most (50%) felt a flat rate user fee best and only 15.7% felt it should be per station with 34% prefering to give no anwser. They were then asked how much they would be willing to pay per year.

fee basis willingness to pay for DAS


We also asked how the user’s operation would be affected if DAS was discontinued next year. The majority of survey participants indicated that the discontinuation of DAS would have “major” or “modest” impacts on the clarity of treatment timings (95%), on the improvement of the user’s overall management strategy (88%), level of pest control (76%), management for multiple pests (71%), costs for pest management (71%), the user’s number of sprays (70%), the user’s choice of chemicals for best efficacy (64%), and choice of chemicals to reduce natural enemy mortality (58%).

impact of DAS loss

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Vincent P. Jones

Professor & Entomologist

Department of Entomology, Washington State University Tree Fruit Research & Extension Center, Wenatchee, WA 98801

(509) 663-8181 ext. 273 (phone) (509) 662-8714 (fax)



Links of Interest

Codling moth mating videos

Immuno-marking studies

Decision Aid System user statistics


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