Chemical control of nutsedge (Cyperus rotundus L.) and the metabolism of 3,6-dichloro-O-anisei acid (dicamba) /

Abstract

REVIEW OF LITERATURE Nutsedge and Its Control Nutsedge is one of the most persistent weeds in croplands and is very often a serious pest in vegetable crops and in nursery stocks. This weed not only causes reduction in yield through competition for water and minerals in the soil, but also increases the cost of cultivation and lowers crop quality. It is also a problem in lawns, where it spoils the appearance of the turf. Bell et al. (1962) pointed out that nutsedge rhizomes grew through potato tubers, thus increasing the proportion of culls. Nutsedge tubers were also found to pass through bean-shelling equipment, necessitating hand sorting. Although nutsedge is a native of Asia, it is distributed widely in all warm regions and is found in Africa, Australia, and in the warmer parts of Europe. The plant is adaptable to a wide variety of soils and environmental conditions in tropical or subtropical regions (Muenscher, 1955)* In the United States, it is found from Virginia to Florida, Kansas, and Texas. Yellow nutsedge (Cyperus esculentus L.

Translocation of the Herbicide Dicamba in Purple Nutsedge, Cyperus rotundus

“…Column temperature, 125'^C; flow rate, 120 ml argon per minute; pressure drop, 1.23 atm; other conditions as described by Ray and Wilcox (1967 The authors recognize that different results might be noted if tbe indirectly treated tuber were dormant. These results are somewhat surprising in that dicamba, despite the relative ease of translocation, was ineffective against nutsedge when applied at 5.7 kg per hectare in the field (Ray 1967).…”