Optimizing Fungicide Application Timing Against Powdery Mildew Using Spore Traps
All attendees must receive a score of 70% or greater to receive course credit. You will have multiple opportunities to complete this exam however, the questions will be shuffled after each attempt.
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Which of the following elements of the disease triangle can be monitored using spore traps?  *
10 points
The following graphs suggest (All correct answers must be selected) *
10 points
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Which of the following is NOT part of the disease triangle? *
10 points
How many powdery mildew spores put my vineyard at risk?  *
10 points
Can spore traps only capture spore produced within your own vineyard? *
10 points
Which of the following factors is NOT important when placing spore traps at your vineyards? *
10 points
The probability of detecting spores early during the season is proportional to the number of spore traps placed in your vineyard  *
10 points
Grapevine powdery mildew is a monocyclic disease? *
10 points
Which of the following is a drawback of using Sulfur fungicides for powdery mildew management?  *
10 points
A spore trap has been place next to your highly susceptible block of Chardonnay.  Seven days after applying sulfur on 3-May the number of spores remains zero and 2 hours and temperatures above 90F are forecast for the next 5 days.  A liberal approach would suggest  *
10 points
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What is the most important plant disease of grapevines in California? *
10 points
What are the most used fungicide(s) for control of powdery mildew in California? *
10 points
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