Yellow Nutsedge Control by Alachlor

Abstract

Preplant or preemergence application of 2-chloro-2′, 6′-diethyl-N-(methoxymethyl) acetanilide (alachlor) at 3.36 or 4.48 kg/ha effectively controlled yellow nutsedge (Cyperus esculentusL.) in field and greenhouse studies. Depth of tubers in the soil did not affect response to alachlor. Alachlor at 3.36 kg/ha only controlled yellow nutsedge effectively in soils with less than 6% organic matter. Alachlor at 3.7 × 10-6M and 1.8 × 10-4M inhibited growth and killed newly emerging shoots in petri dish cultures. However, alachlor did not inhibit sprouting of yellow nutsedge tubers.