Published online by Cambridge University Press: 12 June 2017
Mugwort (Artemisia vulgaris L.) was controlled by soil applications of potassium azide at 100 lb/A and equimolecular amounts of sodium azide in greenhouse studies. Rooted Artemisia plants exposed to exponential concentration ranges of these herbicides in ¼ strength Knops nutrient solution showed lethal effects at 10-3 M of either the potassium or sodium azide. Vapors of the potassium and sodium azides caused leaf injury at relatively low rates. Bioassays indicated dissipation of 100 lb/A of the azides in the soil in 6 weeks under greenhouse conditions.