Published online by Cambridge University Press: 12 June 2017
The influence of soil-applied phosphorus on the phytotoxicity of soil-applied 3-amino-s-triazole (amitrole) and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron) for corn (Zea mays L.), ryegrass (Lolium multiflorum L.), rye (Secale cereale L.), snapbeans (Phaseolus vulgaris L.), soybeans (Glycine max (L.) Mers.), sorghum (Sorghum vulgare Pers.), wheat (Triticum aestivum L.), cotton (Gossypium hirsutum L.), peanuts (Arachis hypogaea L.), and peas (Pisum sativum L.) was studied under greenhouse conditions. All species except cotton and peanuts indicated an amitrole-phosphorus interaction. Greater phytotoxicity was found for a given rate of amitrole as the soil phosphorus level was increased. A diuron-phosphorus interaction was observed for cotton and soybeans only.