Abstract
A pot house experiment was conducted at the Rajasthan College of Agriculture, Udaipur, Rajasthan (India), to find out relationship among edaphic factors for the development of root rot in ajwain (Trachyspermum ammi L.). Results revealed that maximum (30.0%) and minimum (12.0%) plant mortality at 45 days after sowing were observed in infected pot soil of Lalawas village (Chittorgarh district) and Kanad village (Pratapgarh district), respectively. Although at 75 days after sowing, maximum (49.5%) and minimum (18.2%) plant mortality was recorded in the soils of Lalawas village and Kanad village, respectively. However, overall maximum disease incidence (39.7%) was recorded in pots having soil of Lalawas village while it was minimum (15.1%) in the soil of Kanad village. This study suggests that delayed sowing predisposes the ajwain plants for Rhizoctonia root rot disease, so farmers should be advised for early sowing of ajwain crop.
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