Effect of organic treatment on stem gall disease, growth and yield of coriander

Abstract

Coriander (Coriandrum sativum L.) is an important spices crop, grown in a wide range of weather conditions. Coriander suffers from various abiotic and biotic diseases. Among the biotic diseases, stem gall caused by Protomyces macrosporus is a major disease, which causes yield loss up to 33-36%. The experiments were conducted during 2016-17 at Vegetable Farm, Department of Vegetable Science, Narendra Deva University of Agriculture and Technology, Kumarganj, Faizabad (U.P.) with eleven treatments viz., cow urine, cow dung slurry @ 10, 20 and 30% concentration of panchgavya, thiram @ 0.25%, carbendazim @.2%, propiconazole @ 0.2% concentration and control. The effectiveness of organic treatments @ 30% concentration was significantly reducing the disease intensity. The maximum reduction was found 49.60% and 49.57% in panchgavya @ 30% concentration and minimum 17.61%, 26.88% in cow dung slurry @ 10% concentration during flowering and maturity stage respectively. In case of fungicides, the maximum disease control was recorded 51.70% at flowering stage and 49.71% at maturity stage treated with propiconazole @ 0.2% concentration. The maximum average numbers of chlamydospores were found at soil surface (198.80 g soil-1) and minimum in 2 inch depth (42.20 g soil-1) around the plant. The highest plant height (111.14 cm), no. of branch’s/plant (7.26), number of umbel/plant (100.6), nuber of umblet/plant (6.13), seed weight/plant (9.82 g), straw weight (14.52 g) were obtained in seed treatment + soil drenching of panchgavya @ 30% concentration. The lowest plant height (101.13 cm), no. of branch’s/plant (6.60), number of umbel/plant (84.93), number of umblet/plant (5.33), seed weight/plant (7.78 g) and straw weight (9.58 g) were obtained in seed treatment + soil drenching with cow dung slurry @ 10% concentration respectively.  Â