THAKUR, MEENAHANDA, SHREYA2017-03-282017-03-282016http://krishikosh.egranth.ac.in/handle/1/5810006286ABSTRACT The present investigation entitled “Effect of effluents on tomato (Solanum lycopersicum Mill.) crop production” was carried during the year 2015-2016 in pot experiment in the experimental farm of Department of Environmental Science, Dr Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan which is located at an altitude of 1273 m amsl and at latitude of 35.5°N, longitude of 77.8°E. The study comprised of 13 treatments viz., T1 (75% of industrial effluent), T2 (50% of industrial effluent), T3 (25% of industrial effluent), T4 (75% of distillery effluent), T5 (50% of distillery effluent), T6 (25% of distillery effluent), T7 (75% of municipal effluent), T8 (50% of municipal effluent), T9 (25% of municipal effluent), T10 (75% of domestic effluent), T11 (50% of domestic effluent), T12 (25% of domestic effluent) and T13 (control, pond water). The whole set of experiment was conducted in 3 replications in CRD. The analysis of effluent (100%) indicated high pH in the range of 5.92 - 6.84, As content below permissible level, Cd, Cr, Cu, Fe and Pb content above permissible level except for pond water, high, Hg content (much above the permissible level) and negligible amount of Ni. Statistically, highest total number of flowers (48.29) and highest total number of fruits (67.30) were recorded in treatment T12, whereas, statistically, lowest number of flowers 16.99 and lowest number of fruits 35.31 were recorded at treatment T1. Leaf area highest (34.20 cm2) and lowest (16.30 cm2) was recorded at treatment T10 and T3, respectively. Highest plant height of 138.70 cm and lowest of 70.00 cm was recorded in treatment T12 and T1, respectively. The number of branches varied from 2-3. The highest tomato fruit weight (86.04 g) and lowest (35.16 g) was recorded in treatment T10 and T1 and highest yield (699.00 g) and lowest (121.60 g) was recorded in treatment T12 and T1, respectively. The As, Cd, Cr, Cu and Pb content was below permissible level, whereas, Fe content was above the permissible level for soil and Ni was negligible. Hg content varied from 1.17 to 2.05 ppm which was below the permissible levels except for treatment T10, T1, T4 and T7. Heavy metal content for tomato leaves and fruits was below the permissible level. The N, P, K values for soil, leaves and fruits of tomato varied from 191.99-309.40, 22.80-5.80, 104.00-140.50 kg/ha; 2.61-2.82, 0.65-0.86, 2.32-2.58% and 2.46-2.78, 0.54-0.79, 2.462.18%, respectively. The As, Cd, Cr, Cu, Fe, Ni, Pb and Hg content in the 6th instar of Spodoptera litura F. varied from 0.02 to 0.25 ppm, 0.02 to 0.47 ppm, 0.05 to 1.22 ppm, 2.20 to 19.60 ppm, 0.01 to 0.03 ppm, 0.02 to 4.35 ppm and 0.10 to 1.00 ppm , respectively. Larvae of S. litura were unable to complete their life cycle when fed on tomato leaves irrigated with treatments T1, T8 and T9. Pupal and adult deformities were observed in treatments T2, T7 and T11. Longest larval, pupal and total developmental period was recorded at treatment T7 (30.64±3.47 days). Shortest life cycle of 23.29±3.47 days was recorded for treatment T5 and longest in treatment T7. Since, total number of flowers, fruits and yield of tomato were highest at 25 per cent of domestic effluent as compared to control, from the study it can be suggested that domestic effluent after dilution up to 25 per cent can be used for irrigation purpose.ennullThesis