Many vigorous herbaceous perennials need early growth regulation. Treatment at the plug stage could improve early growth control or maintain product size in the plug tray. Concise (uniconazole, Fine Americas, Inc.), is a growth regulator labeled for use on ornamental greenhouse crops in the US. We treated plugs of five herbaceous perennials with a 2-minute dip into 0, 1, 2, 3, 4 or 5 mg/L Conci...

87 along the track at which the track crossing occurred. The instrumentation required is a fast digital oscilloscope, a spectrum analyzer, and a harddrive control program with integrated GPIB data acquisition. In a short time, peak amplitude and track crossing times for several thousand seeks can be acquired. Plotting the peak amplitude versus track crossing time provides a profile of the rough...