Acorus calamus L. an aromatic rhizomatous herb plant has a long history as a medicine which is often used as stimulant, mild tonic, carminative, diaphoretic, expectorant, hypertensive, sedative and also used in the treatment of arthritis, neuralgia, diarrhea, dyspepsia, hair loss and other disorder. Among the several constraints in productivity of this medicinal plant, abiotic stress relating to disease is the major one. The rust disease caused by Uromyces spp is one of the important disease causing huge losses of the plant and is greatly influenced by the abiotic factors. | Effect of abiotic factors on the incidence of rust disease in Acorus calamus L. under terai zone of west Bengal, India