UC Davis Powdery Mildew Management

Thank you for your participation in this short survey. Our lab has conducted research on grape powdery mildew control for several decades throughout California. The purpose of this survey is to assess perceptions and practices relating to the use of biological fungicides for control of grape powdery mildew among California growers and those involved with disease management. The survey is anonymous and no personally identifiable information will be published or shared outside our lab. Your participation is completely voluntary. Your may choose, by checking a box at the end of the survey, to be entered into a drawing for one gift card of $300, or three second place gift cards valued at $100.

Christopher Janousek, Ian Bay, and W. Douglas Gubler

For more information contact: cnjanousek@ucdavis.edu; Hutchison Hall, One Shields Ave., Davis, CA 95616

DEPARTMENT OF PLANT PATHOLOGY, UNIVERSITY OF CALIFORNIA, DAVIS
1. Are you a ...
2. What type of grapes do you grow?
3. What varieties do you grow? (Please list the top five.)
4. In which count(ies) of California is your vineyard located?
5. Is your vineyard organically certified?
6. Is your vineyard biodynamically certified?
7. How frequently do you use organically-approved fungicides to control powdery mildew?
8. How many acres of grapes do you farm or manage?
9. For how many years have you produced grapes?
10. What was the value of your crop (in $ per ton) in 2008?
11. For each of the following products available to treat powdery mildew, please indicate your level of familiarity and use.
Never heard ofFamiliar, but have not usedUse occasionally in my vineyard(s)Use often in my vineyard(s)
Actino-Iron (Streptomyces lydicus)
Actinovate (Streptomyces lydicus)
AQ10 (Apelomyces quisqualis)
Companion (Bacillus subtilis)
Garden Solutions (Trichoderma harzianum)
Plant Shield (Trichoderma harzianum)
Root Guardian (Trichoderma harzianum)
Serenade (Bacillus subtilis)
Sonata (Bacillus pumilus)
12. For each of the choices below, please indicate your opinion of its effectiveness for control of powdery mildew.
Don't knowNever effectiveSometimes effectiveUsually effectiveAlways effective
Actino-Iron (Streptomyces lydicus)
Actinovate (Streptomyces lydicus)
AQ10 (Apelomyces quisqualis)
Companion (Bacillus subtilis)
Garden Solutions (Trichoderma harzianum)
Plant Shield (Trichoderma harzianum)
Root Guardian (Trichoderma harzianum)
Root Shield (Trichoderma harzianum)
Serenade (Bacillus subtilis)
Sonata (Bacillus pumilus)
13. Under which growing conditions would you be most likely to use biological fungicides to treat powdery mildew? (Please check all that apply)
14. For the last group of six questions below we are interested in your opinion about various classes of products available to treat powdery mildew. Please select one box per question.
Synthetic fungicides (e.g. Flint, Rally, Quintec)Biological productsSulfurOilsAll products are about the sameUnsure
Which type of products are the least expensive?
Which group of products are the most effective?
Which products present the lowest risk to human health?
Which type of products are most environmentally-friendly?
Which type of products are easiest to use in terms of label restrictions (e.g., frequency and amount of product allowed)?
Overall, which group of products are most valuable to you for control of powdery mildew?
15. If you would like to be entered in our drawing for gift cards, please indicate this, along with your name and mailing address, below. Thank your for your participation.
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