Standardization of Seed Coating Polymer in Pigeonpea (Cajanus cajan L.)

Laboratory experiment was conducted with the objective to standardize the seed coating polymer in Pigeonpea (Cajanus cajan L.). The experiment consisted of five different dosages of polymer (P) along with a control viz., P1: Control, P2: polymer @ 2 ml per kg of seed, P3: polymer @ 4 ml per kg of seed, P4: polymer @ 6 ml per kg of seed, P5: polymer @ 8 ml per kg of seed, P6: polymer @ 10 ml per kg of seed. Among the treatments imposed, seed coating polymer @ 8 ml/kg of pigeonpea seeds recorded significantly higher germination, speed of germination, shoot length (cm), root length (cm), seedling dry weight (mg/seedling) and seedling vigour index (SVI) as compared to control. However, seed coating polymer @ 8 ml/kg of seed was significantly not different with the results obtained by seed coating polymer (@ 10 ml/kg and @ 6 ml/kg respectively) of seed. Therefore, the polymer @ 6 ml/kg of seed was found to be economically feasible over all the treatments.