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Use of Topaz (propiconazole) for transplant size control and early maturity of processing tomato Jim Dick Tomato Solutions, Chatham John Zandstra Ridgetown.

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Presentation on theme: "Use of Topaz (propiconazole) for transplant size control and early maturity of processing tomato Jim Dick Tomato Solutions, Chatham John Zandstra Ridgetown."— Presentation transcript:

1 Use of Topaz (propiconazole) for transplant size control and early maturity of processing tomato Jim Dick Tomato Solutions, Chatham John Zandstra Ridgetown College John Lang Kraft Canada, Dresden

2 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

3 Paclobutrazol (Bonzi) - application to processing tomato seedlings as a soil 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

4 Propiconazole (Topaz, Tilt) - presently registered as a fungicide on several food crops in Ontario: - sweet corn- apricot - rutabaga- cherry - asparagus- peach and nectarine

5 Methods - Transplants produced in the research greenhouse at Kraft, Dresden - Used 2 commercial varieties - TSH 04 (early hybrid) - CC337 (late inbreed)

6 Methods -Treatments included: 1. Control 2. 5 ppm Paclobutrazol ppm Propiconazole ppm propiconazole (2 applications) ppm propiconazole ppm propiconazole - All treatments were applied at the 2 nd true leaf stage at a volume of 100 ml per tray

7 Greenhouse Fertilizer Regime Control: fertilizer solution at all times - used Plant Products and fertilizer Paclobutrazol: for 5 days per week; the rest of the time Propiconazole: once per week the rest of the time

8 Plant Height (mm) - 42 days a c b ab a

9 Plant Weights (g) 42 days a d c b b b a c b b b b a c b bb b

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11 Plant Weights – Field (Ridgetown) TSH04 and CC337 b b a aa aa a a a a a

12 Flower Counts – Ridgetown TSH04 and CC337 a a a a a a a a a a b b

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14 Yield (tons/acre) – Ridgetown TSH04 and CC337

15 Yield (percentage) – Ridgetown TSH04 and CC337 a cbc b d a ab cd abc

16 Methods – Trial 2 -Treatments included: 1. Control ppm paclobutrazol ppm propiconazole ppm propiconazole ppm propiconazole ppm propiconazole - All treatments were applied at the 2 nd true leaf stage at a volume of 100 ml per tray - Propiconazole treatments were made by applying 50 ppm solution at 5 day intervals

17 Plant Weight (g) – 36 Days a bc b c c c a bab bbb a bc b c cc

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19 Plant Weights – Field a d bbc cd a d b b b c

20 Flower Counts a d a bccd a c ab bc c a c ab c bc

21 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

22 Plant Height a a c c c b b


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