Use of Topaz (propiconazole) for transplant size control and early maturity of processing tomato
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Transcript of Use of Topaz (propiconazole) for transplant size control and early maturity of processing tomato
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Use of Topaz (propiconazole) for transplant size control and early maturity of processing tomato
Jim DickTomato Solutions, Chatham
John ZandstraRidgetown College
John LangKraft Canada, Dresden
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Background
- managing transplant height can be challenging at times
- techniques to help manage height would be useful
- transplants which establish and grow quickly are desired
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Paclobutrazol (Bonzi)
- application to processing tomato seedlings as a soil drench @ 5 ppm at the 2 leaf stage required up to 5 times the fertilizer rate to achieve the desired plant height
- resulted in increased vigor in the field and advanced maturity
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Propiconazole (Topaz, Tilt)
- presently registered as a fungicide on several food crops in Ontario:
- sweet corn - apricot- rutabaga - cherry- asparagus - peach and nectarine
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Methods
- Transplants produced in the research greenhouse at Kraft, Dresden
- Used 2 commercial varieties
- TSH 04 (early hybrid)
- CC337 (late inbreed)
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Methods
-Treatments included:1. Control 2. 5 ppm Paclobutrazol3. 25 ppm Propiconazole4. 25 ppm propiconazole (2 applications)5. 37.5 ppm propiconazole6. 50 ppm propiconazole
- All treatments were applied at the 2nd true leaf stage at a volume of 100 ml per tray
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Greenhouse Fertilizer Regime
Control: 60-5-65 fertilizer solution at all times
- used Plant Products 12-2-14 and 14-0-14 fertilizer
Paclobutrazol: 150-25-175 for 5 days per week; 60-5-65 the rest of the time
Propiconazole: 150-25-175 once per week60-5-65 the rest of the time
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Treatment
Heig
ht (m
m)
Control Paclo 5 Prop 25 Prop 25 2x Prop 37.5 Prop 50
Plant Height (mm) - 42 days
a
c
bab
aab
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Top Root Total
Treatment
Weig
ht (g
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Control Paclo 5 Prop 25 Prop 25 2x Prop 37.5 Prop 50
Plant Weights (g) 42 days
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699 CHU 849 CHU
Treatment
Weig
ht (g
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Control Paclo 5 Prop 25 Prop 25 2x Prop 37.5 Prop 50
Plant Weights – Field (Ridgetown)TSH04 and CC337
b
b
a a a a a
a aa
a a
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699 CHU 990 CHU
Treatment
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Control Paclo 5 Prop 25 Prop 25 2x Prop 37.5 Prop 50
Flower Counts – RidgetownTSH04 and CC337
aa a
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Total Red
Treatment
tons/acre
Control Paclo 5 Prop 25 Prop 25 2x Prop 37.5 Prop 50
Yield (tons/acre) – Ridgetown TSH04 and CC337
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% Ripe % Green
Treatment
Perc
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Control Paclo 5 Prop 25 Prop 25 2x Prop 37.5 Prop 50
Yield (percentage) – Ridgetown TSH04 and CC337
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Methods – Trial 2-Treatments included:
1. Control 2. 2.5 ppm paclobutrazol3. 50 ppm propiconazole4. 100 ppm propiconazole5. 150 ppm propiconazole6. 200 ppm propiconazole
- All treatments were applied at the 2nd true leaf stage at a volume of 100 ml per tray
- Propiconazole treatments were made by applying 50 ppm solution at 5 day intervals
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Top Root Total
Treatment
Weig
ht (g
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Control Paclo 2.5 Prop 50 Prop 100 Prop 150 Prop 200
Plant Weight (g) – 36 Days
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a b ab b b b
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Plant Weights – Field
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295 CHU 458 CHU
Treatment
Weig
ht (g
)
Control Paclo 2.5 Prop 50 Prop 100 Prop 150 Prop 200
ad b bc bc cd
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c
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669 CHU 775 CHU 884 CHU
Treatment
Flo
wers
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Control Paclo 2.5 Paclo 50 Paclo 100 Paclo 150 Paclo 200
Flower Counts
ad a bc cd cd a
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abbc bc c
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abab
c bc
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Uniconazole- - presently registered for growth
regulation in greenhouse bedding plants
- previous work demonstrated similar growth response of beans to paclobutrazol and uniconazole
- minor use request for use on tomato and pepper transplants in US
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Treatment
Heig
ht (c
m)
Control Paclo 5 Prop 2x50 Unicon 5 Apogee 50 Nova 150
Plant Height
a
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c c cb b