NAPROPAMIDE LEACHING IN CONTAINER NURSERY MEDIA.

in HortScience
View More View Less
  • 1 Department of Horticulture, Colorado State University, Fort Collins, CO 80523

Three commonly used nursery media were packed into 10×40 cm long PVC plastic columns. Two treatments of aqueous applied napropamide [2-(αnapthoxy)-N,N diethyl propionamide] were used including: 1) 13.44 kg/ha, 2) 20.16 kg/ha. Two water treatments were applied to the columns: 1) 2.54 cm/.405 ha, 2) 5.08 cm/.405 ha. Leachate from the columns was collected every three days for a period of two weeks. Quantitative bioassay testing using a napropamide sensitive plant species Hordeum vulgare L. (barley) have indicated a downward linear trend in the growth of roots and shoots when exposed to increasing concentrations of napropamide in controlled petri dish experiments. Preliminary leachate studies indicate that napropamide concentrations in the leachate collected are below levels detectable by the barley bioassay (< .25 ppm) at the label recommended rate of 6.72 kg/ha. Gas chromatography studies will be conducted to confirm napropamide concentrations in the collected leachate.

If the inline PDF is not rendering correctly, you can download the PDF file here.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 65 5 1
PDF Downloads 57 18 3