Effect of green shade nets on yield and quality of tomato (Lycopersicon esculentum Mill) in semi-arid region of Punjab.

Abstract

A field trial was conducted at Central Institute of Post-harvest Engineering and Technology (CIPHET), Abohar (Punjab) during 2011-12 to determine the effect of three green shade nets (35,50 and 75%) along with three height (2, 2.5 and 3.5 metre) bamboo framed structures on yield and quality of tomato. There was no significant difference found in average monthly temperature and humidity inside shade net house and open field (control). Significant difference was recorded in yield. Highest average plant yield of (3.49 kg/plant) was found in 35 % shading net followed by open field (2.27). Lowest yield observed (1.07 kg / plant) in 75 % shading net. The tomatoes grown under shade net structures were glossy in appearance with good colour development as compared to open field (control). Further tomatoes produced in open field were attacked by the pest (Helicoverpa armigera) attack. No significant difference was observed in quality attributes viz. TSS, Acidity and ascorbic acid by shade net structures. However the higher TSS (6.1 oBrix), Acidity (0.69) and ascorbic acid (40.86 mg/100gm) was recorded in 35% shade net compare to control, (5.7, 0.61 and 36.42) respectively. Thus, use of 35 % shade net brought improvement in quality and yield of tomato grown in semi-arid region.