EFFICACY AND POSTHARVEST LONGEVITY OF UNICONAZOLE TREATMENT ON POLKA-DOT PLANT

in HortScience
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  • 1 Department of Plant and Soil Science, Southern Illinois University, Carbondale, IL 62901

The objective of the research was to determine the effectiveness of uniconazole on Hypoestes phyllostachya Bak. cv. Pink Splash and to compare the effect and persistence of uniconazole with chlormequat and daminozide for limiting stem elongation during post-greenhouse, low light conditions. Uniconazole at 5.0 mg·liter-1 reduced all measured plant dimensions to the same degree as chlormequat at 2500 mg· liter-l when both chemicals were applied twice as foliar sprays at a two week interval. These treatments resulted in the most compact and aesthetically pleasing 0.4-liter potted plants. However, this uniconazole treatment was not as persistent in postproduction low light conditions as chlormequat. By the fifth week under low light conditions, only the highest drench concentration of uniconazole tested (0.10 mg a.i. per pot) remained the same height as chlormequat treated plants.