Role of thiourea and sulfuric acid in frost injury on mustard (Brassica juncea L.)

An on farm testing experiment was conducted during rabi 2006–07, 2007–08 and 2008–09 for three consecutive years at farmers field of Chandan and Bharwa villages of Jaisalmer district, to study the role of thiourea and solid acid in frost injury on mustard (Brassica juncea L.). The objective of the study was refinement of recommended practice of H₂SO₄ spray on mustard for controlling frost injury. Among the treatments 0.1 per cent spray of thiourea was significantly higher in yield attributes and grain yield (16.61q/ha) over other treatments and farmers practices (13.31q/ha) and it was 24.79 per cent higher over control. This treatment also resulted in the significantly higher economic benefits and gave an extra return of Rs 5,059 over farmer practice because to thiourea imparting frost tolerance in crop plants. The results imply that, thiourea can be considered as an important molecule for increasing stress tolerance of crops under field conditions.