Cyperus esculentus and Cyperus rotundus

Abstract Cyperus esculentus and Cyperus rotundus are common weeds of agricultural and horticultural cropping systems throughout tropical, subtropical, and temperate areas of the world. A network of rhizomes, tubers, and basal bulbs are the primary mechanism by which both species proliferate. Both species are favored by high light intensity and tolerate a wide range of soil types, but the most important factors affecting their prevalence are temperature, soil moisture, and photoperiod. High growth rates and quick emergence of these species create competition during early crop development that can result in yield reductions leading to significant economic losses. Crop quality, weed control strategies, and harvest operations are often compromised. No single control tactic provides season-long control of Cyperus species; therefore an integrated approach that involves biological, cultural, and chemical options will be most effective.