APMTP, AIPMTP, orchard, AIPMTP 2007 Consultants Survey Results - Leafroller

Tree Fruit Research & Extension Center

Apple IPM Transition Project

Survey Results

2007 Field Season Consultant Survey

The first set of surveys went out to apple industry consultants in July 2008. The results are now available for viewing online here or you can download the report. Another consultant survey went out in January of 2010 asking about practices during the 2009 field season. The results of that survey are now available for viewing by clicking the link to the left.

Consultant Survey Results
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How often do leafroller cause noticeable crop damage, result in higher production costs, or make production more difficult in the apple orchards for which you make recommendations?

 

  Frequency Percent
Less than 1 out of every 5 years 11 28.2
About 1 out of every 5 years 1 2.6
About 2 out of every 5 years 8 20.5
About 3 out of every 5 years 5 12.8
About 4 out of every 5 years 2 5.1
Every year 12 30.8
Total 39 100.0
Non-responses = 1
 

 

 
If no controls were applied for leafroller this year, what level of crop injury would you expect by harvest? *

 

  Frequency Percent
Less than 1% 2 5.1
1-2% 5 12.8
3-5% 10 25.6
6-10% 13 33.3
More than 10% 9 23.1
Total 39 100.0
Non-responses = 1

*1 comment = “1 yr?” i.e. the person probably wanted to know if this meant level of crop injury over just 1 year

 

 
During the 2007 growing season, did you recommend any of the following insecticides as a control for leafroller?

 

  Frequency Percent
Lorsban (chlorpyrifos) 32 80.0
Guthion (azinphos methyl) 0 0
Imidan (phosmet) 0 0
Diazinon 0 0
Non-responses = 0
 

 

 
How did the frequency of your recommendation of these insecticides (Guthion, Losban, Diazinon, and Imidan) as a control for leafroller compare in 2007 growing season to 3 previous growing seasons?

 

  Frequency Percent
The frequency of my recommendation of these insecticides was higher in 2007 0 0
The frequency of my recommendation of these insecticides was lower in 2007 15 37.5
The frequency of my recommendation of these insecticides remained about the same in 2007 20 50.0
I did not recommend these insecticides during the 2004-2007 growing seasons 5 12.5
Total 40 100.0
Non-responses = 0

 
During the 2007 growing season, did you recommend this insecticide as a control for leafroller?

 

Insecticide Frequency Percent Non-
Responses
Success (spinosad) 37 92.5 0
Proclaim (emamectin benzoate) 33 82.5 0
Intrepid (methoxyfenozide) 32 80.0 0
Entrust (spinosad) 31 77.5 0
Bt (Bacillus thuringiensis) 29 72.5 0
Rimon (novaluron) 26 65.0 0
Esteem (pyrifoxen)a 23 59.0 1
Horticultural spray oil 17 42.5 0
Pheromones (mating disruption)b 5 12.5 0
Other (Entreed? (spelling problem)) 1 2.5  
a 1 comment = Wrote “But no more than 1 or 2 apps” for Esteem
b 1 comment = Wrote “Some” for pheromones
 

 

 
How often do you recommend or practice this IPM tactic as part of your consulting program for leafroller management?

 

IPM tactic Never
(%)
Rarely
(%)
Occasionally
(%)
Often
(%)
Non-
responses
Field monitoring for damagea     5.0 95.0 0
Resistance management strategies   5.0 17.5 77.5 0
Degree day models 5.0 22.5 5.0 67.5 0
Economic or treatment thresholds 10.0 10.0 25.0 55.0 0
Pheromone traps 10.0 20.0 32.5 37.5 1
Border sprays 45.0 32.5 12.5 10.0 0
Use of biological control agentsb 28.9 34.2 28.9 7.9 2
Reduced pesticide rates 56.4 30.8 10.3 2.6 1
Alternate row middle spraying 66.7 25.6 5.1 2.6 1

a 1 comment = Wrote “Always” and drew a star next to field monitoring for damage;
b 1 comment = Wrote “BT” next to use of biological control agents

(vs CM(%))

 

 
Over the past three years did leafroller injury in the apple orchards for which you make recommendations increase, decrease, or remain about the same? *

 

  Frequency Percent
Leafroller injury increased 4 10.0
Leafroller injury decreased 15 37.5
Leafroller injury remained about the same 21 52.5
Total 40 100.0
Non-responses = 0
*1 comment = “(Proclaim!!)”


 
Over the past three years did the cost of leafroller control in the apple orchards for which you make
recommendations increase, decrease, or remain about the same?

 

  Frequency Percent
The cost of leafroller control increased 23 57.5
The cost of leafroller control decreased 2 5.0
The cost of leafroller control remained about the same 15 37.5
Total 40 100.0
Non-responses = 0
 

 

 
What percentage of the conventionally managed apple acres for which you make recommendations would you estimate the preceding section on leafroller applies to? *

 

% of acres Frequency Percent
1-10% 3 7.7
11-25% 1 2.6
26-50% 2 5.1
51-75% 9 23.1
76-99% 15 38.5
100% 9 23.1
Total 39 100.0
Non-responses = 1
*1 comment = Wrote “less than” (and checked 1-10%, so meant less than 1-10%? Misunderstood question?)

 

 

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