Browsing by Author "Raheja, Sandeep"
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ThesisItem Restricted Epidemiology and Management of Post harvest diseases of Kinnow mandarin(Punjab Agricultural University, Ludhiana, 2021) Gurwinder Kaur; Raheja, SandeepSurveys were conducted periodically (twice in a month) from January to March during 2019 and 2020 to record the incidence and prevalence of major post-harvest rots of Kinnow mandarin and pathogens associated with it in South-western Punjab. Highest incidence of post-harvest rot of Kinnow mandarin 20.21 and 12.59 percent was observed in the month of March during the year 2019 and 2020, respectively. Penicillium digitatum and Penicillium italicum causing green and blue mould rots were found to be two most prevalent post-harvest pathogens with their prevalence of 30.88 and 26.44 percent, respectively during 2019 and 32.44 and 24.88 percent, respectively, during 2020. Temperature of 25˚C favoured maximum radial growth (84.67 mm) of both test pathogens also, maximum percent disease index of green (95.00 percent) and blue mould rot (90.00 percent) was recorded at 25˚C. The pH 5.5 and 6.0 supported maximum radial growth of P. italicum by 90.00 & 88.66 mm and of P. digitatum by 88.67 & 87.67 mm, respectively and were found to be at par with each other. Among different GRAS chemicals and botanicals evaluated against test pathogens, copper sulphate, boric acid, sodium bicarbonate and sodium carbonate at 100mM and above concentrations among chemicals and garlic extract at 10 per cent and above concentration among botanicals showed complete inhibition (100.0 percent) of both test pathogens under in vitro, whereas, under in vivo garlic extract at the concentration of 15 percent showed complete inhibition of green (100.0 percent) and of blue mold rot (92.22 percent). Boric acid at the concentration of 4 percent showed complete inhibition (100.0 percent) of both the test pathogens.ThesisItem Open Access Epidemiology and Management of Post harvest diseases of Kinnow mandarin(Punjab Agricultural University, Ludhiana, 2021) Gurwinder Kaur; Raheja, SandeepSurveys were conducted periodically (twice in a month) from January to March during 2019 and 2020 to record the incidence and prevalence of major post-harvest rots of Kinnow mandarin and pathogens associated with it in South-western Punjab. Highest incidence of post-harvest rot of Kinnow mandarin 20.21 and 12.59 percent was observed in the month of March during the year 2019 and 2020, respectively. Penicillium digitatum and Penicillium italicum causing green and blue mould rots were found to be two most prevalent post-harvest pathogens with their prevalence of 30.88 and 26.44 percent, respectively during 2019 and 32.44 and 24.88 percent, respectively, during 2020. Temperature of 25˚C favoured maximum radial growth (84.67 mm) of both test pathogens also, maximum percent disease index of green (95.00 percent) and blue mould rot (90.00 percent) was recorded at 25˚C. The pH 5.5 and 6.0 supported maximum radial growth of P. italicum by 90.00 & 88.66 mm and of P. digitatum by 88.67 & 87.67 mm, respectively and were found to be at par with each other. Among different GRAS chemicals and botanicals evaluated against test pathogens, copper sulphate, boric acid, sodium bicarbonate and sodium carbonate at 100mM and above concentrations among chemicals and garlic extract at 10 per cent and above concentration among botanicals showed complete inhibition (100.0 percent) of both test pathogens under in vitro, whereas, under in vivo garlic extract at the concentration of 15 percent showed complete inhibition of green (100.0 percent) and of blue mold rot (92.22 percent). Boric acid at the concentration of 4 percent showed complete inhibition (100.0 percent) of both the test pathogens.ThesisItem Open Access Studies on the interaction of carbosulfan as seed treatment and fertilizers against root-knot nematode (Meloidogyne javanica) in chickpea(CCSHAU, 2004) Raheja, Sandeep; Gupta, D.C.Studies on the interaction of carbosulfan as seed treatment with both the methods i. e. seed dressing and seed dipping and fertilizers against root-knot nematode (M. javanica) in chickpea showed that the carbosulfan as seed treatment in the presence of NPK performed well. Among various doses of carbosulfan as seed treatment, carbosulfan 25 SD @ 3 per cent a. i. w/w as seed dressing significantly proved better as compared to carbosulfan 25 EC @ 0.1 per cent a. i. v/v as seed dipping. NPK at recommended dose significantly improved plant growth characteristics and reduced the number of galls as compared to check. Maximum plant growth characteristics and reduction in number of galls was observed in sandy loam soil as compared to sandy soil. Various interactions of fertilizers, chemicals and soil types were also found significant.ThesisItem Open Access Studies on the interaction of carbosulfan as seed treatment and fertilizers against root-knot nematode (Meloidogye javanica) in chickpea.(CCSHAU, 2004) Raheja, Sandeep; Gupta, D.CStudies on the interaction of carbosulfan as seed treatment with both the methods i. e. seed dressing and seed dipping and fertilizers against root-knot nematode (M. javanica) in chickpea showed that the carbosulfan as seed treatment in the presence of NPK performed well. Among various doses of carbosulfan as seed treatment, carbosulfan 25 SD @ 3 per cent a. i. w/w as seed dressing significantly proved better as compared to carbosulfan 25 EC @ 0.1 per cent a. i. v/v as seed dipping. NPK at recommended dose significantly improved plant growth characteristics and reduced the number of galls as compared to check. Maximum plant growth characteristics and reduction in number of galls was observed in sandy loam soil as compared to sandy soil. Various interactions of fertilizers, chemicals and soil types were also found significant.ThesisItem Open Access Studies On Use Of Neem, Mustard And Jatropha Plant Parts And Their Products For The Management Of Root-Knot Nematode (Meloidogyne Spp.) In Vegetable Crops(Chaudhary Charan Singh Haryana Agricultural University; Hisar, 2010) Raheja, Sandeep; Paruthi, I.J.