Arboricultural society of michigan 2012
-
Upload
jerry-white -
Category
Environment
-
view
68 -
download
0
Transcript of Arboricultural society of michigan 2012
![Page 1: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/1.jpg)
Review of the Plant Growth
Regulator (PGR) Program
Michigan State University
Landscape Services Department
![Page 2: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/2.jpg)
PGR (Paclobutrazol)
Paclobutrazol inhibits the production of
gibberellin in plants
New growth is reduced
Growth is controlled for 2-3 years
![Page 3: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/3.jpg)
Safety and ecology
Sub-soil applied
Low water solubility product
Breaks down in the soil quickly
Low toxicity LD50: >5,000 mg/Kg
![Page 4: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/4.jpg)
Plant Health Benefits
Increased fine root-hair production
Increased woody-root production with repeated
applications
Increased carbohydrate storage
Increased resistance to drought and disease
Notably improved foliage color and appearance
![Page 5: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/5.jpg)
Uses for PGR’s
Preservation of plant material impacted by
construction activities
Promote quicker establishment of new trees
Preservation of declining or over-mature trees
Reduction in watering volume and frequency
Reduction in pruning intensity and frequency
![Page 6: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/6.jpg)
How do PGR’s Reduce Pruning?
Normal Growth
Controlled Growth Using a PGR
Yr 0
Yr 6 Yr 2 Yr 1 Yr 0
Yr 1
Yr 5 Yr 4 Yr 3
PGR App PGR App
2012 2013
![Page 7: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/7.jpg)
![Page 8: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/8.jpg)
1. Wilson Hall
Before After
![Page 9: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/9.jpg)
Untreated PGR
1. Wilson Hall
![Page 10: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/10.jpg)
Untreated
PGR
1. Wilson Hall
![Page 11: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/11.jpg)
2. Birch Road
Untreated (East Side) PGR (West Side)
![Page 12: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/12.jpg)
2. Birch Road
Untreated PGR
![Page 13: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/13.jpg)
3. Shaw Hall
Untreated PGR
![Page 14: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/14.jpg)
3. Shaw Hall
Untreated PGR
![Page 15: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/15.jpg)
4. Shaw Lane
Untreated (South Side) PGR (North Side)
![Page 16: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/16.jpg)
4. Shaw Lane
Untreated PGR
![Page 17: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/17.jpg)
5. Owen Graduate Center
Untreated PGR
PGR
![Page 18: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/18.jpg)
6. Hubbard Hall
Untreated (South Side) PGR (North Side)
![Page 19: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/19.jpg)
Results
Thus far in 2012, we have realized significant
growth control on most shrubs treated
spring/early summer
Severe drought stress was reduced by 50% by
utilizing PGR on trees (<10” DBH)
Plant health and appearance improved with
PGR
![Page 20: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/20.jpg)
$0.00
$20.00
$40.00
$60.00
$80.00
$100.00
$120.00
Taxus sp. Forsythia sp. Euonymus sp. Viburnum sp.
(Cost to Use PGR Versus One Pruning Cycle Including Labor and Equipment)
Cost Comparison per 100 Sq. Ft.
PGR Cost
Pruning Cost
![Page 21: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/21.jpg)
Accomplishments to Date
789 trees treated
1,731 individual shrubs treated
64,613 square feet of shrub beds treated
All work was completed in 152 hours with two
applicators
78 gallons of concentrated Paclobutrazol applied
![Page 22: Arboricultural society of michigan 2012](https://reader034.fdocuments.in/reader034/viewer/2022052602/55c2b812bb61ebed508b4583/html5/thumbnails/22.jpg)
Conclusion
PGR is an innovative and cost effective tool to
preserve MSU’s environmental resources
PGR will increase the longevity and aesthetic
quality of plant materials on campus
Re-allocating labor will allow Landscape
Services to maintain a high quality of service to
the MSU campus