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Articles by Saroj Yadav
Total Records ( 3 ) for Saroj Yadav
  Sagar Grover , Shaily Rubina Tirkey , Veeramallegowda , Saroj Yadav and G. Sibi
  Background and Objective: The mutualistic interaction between microalgae and bacteria when co-culturing aid each other by promoting growth. This work was planned to determine the benefits of co-culturing Chlorella vulgaris with Nitrobacter sp. in terms of enhanced microalgal biomass and lipid production. Materials and Methods: Different growth media viz., Bristol media, synthetic waste water and dilutions of waste water were used for co-culturing for a period of 16 days. Enhancement of microalgal growth in terms of growth rate, biomass, protein, carbohydrates, chlorophyll and total lipid content in microalgae were determined at regular intervals and at the end of cultivation period. Results: Specific growth rate was promoted in co-culture after 4th day of cultivation whereas monoculture has resulted in highest growth rate after 13th day of cultivation. Protein and carbohydrate contents of mono- and co-cultured C. vulgaris were 20.03 and 9.413 μg mg1, respectively in 50% sewage water. There was a down trend in dissolved oxygen levels when the microalgae were co-cultured with bacteria. Biomass productivity was 0.0371 g L1/day in monoculture after 16th day of cultivation and was 0.0285 g L1/day after 4 days of cultivation as co-culture. Highest lipid content of 20.69% was observed in monoculture and the co-culture has resulted in 17.93%. Conclusion: The results indicated that co-culturing of C. vulgaris with Nitrobacter resulted in enhanced growth promotion as evidenced by increased cellular composition and biomass content. This interaction could be utilized in enhancing microalgal biomass, especially by replacing nitrogen fertilizers in the growth medium.
  Jaydeep Patil , Anil Kumar , Saroj Yadav and S.R. Goel
  Background and Objective: Root-knot nematode and Fusarium oxysporum f. sp. cucumerinum is one of the most damaging pests in polyhouse crops under protected conditions. Effective fumigants are needed for controlling these destructive pathogens in under protected conditions. The experiment was conducted under polyhouse conditions to study the effect of soil fumigants on the population of root-knot nematode and disease incidence (%) of the fungus on cucumber. However, till date there is very less work have been done on this aspect. Materials and Methods: Autoclaved sterilized soil inoculated with Meloidogyne incognita and Fusarium oxysporum f. sp. cucumerinum. Infested soil fumigated with formalin at 5, 10 and 30% and dazomet at 0.3, 0.6 and 0.9 g kg–1 soil for the management of both the pathogens. Chemical checks with Bavistin at 2 g L–1 water and carbofuran at 1 mg a.i. kg–1 soil, as well as untreated check, were also maintained. Results: The results revealed that all the fumigants were significantly improved plant growth parameters and reduced galling, egg masses formation, final nematode population (PF), reproduction factor (RF) and disease incidence (%) as compared untreated inoculated check. Conclusion: In the present study, results clearly indicated that fumigants have wide range of the nematicidal activity for the reducing nematode as well disease incidence (%).
  Saroj Yadav and R.S. Kanwar
  Background and Objective: Purpose of experiment was to manage cereal cyst nematode (H. avenae) in wheat by using higher doses of fertilizers and spray of zinc, urea and kinetin (a growth regulator). Experiment was conducted for two years (2015 and 2016) in the screen house of Department of Nematology, CCS HAU, Hisar. Materials and Methods: All recommended fertilizers were applied at the time of sowing except nitrogen (urea) which was applied in two split doses i.e., at sowing and 30 days after sowing. Foliar sprays of urea (2.5%)+Zn (0.5%) and kinetin (100 ppm) were applied after 30 and 40 days after sowing in different combinations. Results: The maximum plant growth parameters i.e., plant height (73.8 cm) and plant weight (11.59 g) were observed in the recommended dose of fertilizers combined with urea (2.5%)+Zn (0.5%) spray 30 days after sowing followed by kinetin (100 ppm) spray 40 days after sowing. The nematode population i.e., no. of cyst/pot (152.5) was significantly reduced in 30% higher dose of fertilizers as compared to control. Conclusion: The present study has shown that the foliar spray of urea, zinc and kinetin has significant impact on plant growth and compensate the damage of cereal cyst nematode by adding different foliar spray as compared to infested control.
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