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ThesisItem Open Access STUDY ON WEED SPECTRUM AND EFFICACY OF HERBICIDE MIXTURES IN WET DIRECT SEEDED RICE (Oryza sativa L.)(Indira Gandhi Krishi Vishwavidyalaye, Raipur, 2018) Meher, Sunita; Tiwari, Nitish; Saha, Sanjoy; Bhambri, M.C.; Chowdhury, Tapas; Saxena, R.R.; Savu, R.M.The present investigation entitled “Study on weed spectrum and efficacy of herbicide mixtures in wet direct seeded rice (Oryza sativa L.)” was conducted at Institute Research Farm of ICAR-National Rice Research Institute, Cuttack (Odisha) during kharif season of 2017. The soil of the experimental field was sandy clay loam in texture and neutral (pH 6.8) in reaction with medium fertility having 0.52 % soil organic carbon, low nitrogen (215.4 kg ha-1), medium phosphorous (48 kg ha-1) and high potassium (322.7 kg ha-1) content. The experiment was laid out in Randomized Block Design (RBD) with three replications and twelve treatments viz. nine herbicide mixtures (Azimsulfuron 50% DF+ Bispyribac sodium 10% SC @ (22+25) g ha-1 (T1), Flucetosulfuron 10% WDG (w/w) + Bispyribac sodium 10% SC @ (25+25) g ha-1 (T2), Penoxsulam 21.7% SC+ Cyhalofop-butyl 12% EC (w/v) @ (25+100) g ha-1 (T3) , Fenoxaprop-p ethyl 6.7% EC (w/w) + Ethoxysulfuron 15% WDG (w/w) @ (50+15) g ha-1 (T4) , Bispyribac sodium 10% SC + Ethoxysulfuron 15% WDG (w/w) @ (25+15) g ha-1 (T5), Cyhalofop-butyl 12% EC (w/v) + Ethoxysulfuron 15% WDG (w/w) @ (75+15) g ha-1 (T6) , XR 848 (benzyl ester) 2.5% EC (w/v) + Cyhalofop-butyl 12% EC (w/v) @ (25+100) g ha-1 (T7) , Flucetosulfuron 10% WDG (w/w) + Pretilachlor 30.7% EC @ (25+500) g ha-1 (T8) , Bensulfuron methyl 0.7% + Pretilachlor 7% GR @ (70+700) g ha-1 (T9)), single herbicide Bispyribac sodium 10% SC @ 30 g ha-1 (T10) , weed free (T11) and weedy check (T12). The test rice variety was ‘CR Dhan 203’ which as per the treatments directly sown with a planting geometry of row to row distance 20 cm on 5th July, 2017 and harvested on 25th October, 2017. The crop received 990.71mm rainfall during the study period. Among the weed management treatments, the weed free treatment (T11) registered significantly highest value of growth parameters of rice, like dry matter accumulation, number of tillers m-2, leaf area index, SPAD value, CGR, RGR and yield attributing characters like effective tillers m-2, panicle weight, number of grains panicle-1, number of filled grains panicle-1, grain and straw yield, where as the effects of the treatment remained non-significant in plant height, test weight and harvest index, but the effect of weed free treatment (T11) was at par with Fenoxaprop-p ethyl 6.7% EC (w/w) + Ethoxysulfuron 15% WDG (w/w) @ (50+15) g ha-1 (T4) , Penoxsulam 21.7% SC+ Cyhalofop-butyl 12% EC (w/v) @ (25+100) g ha-1 (T3) , Azimsulfuron 50% DF+ Bispyribac sodium 10% SC @ (22+25) g ha-1 (T1), Flucetosulfuron 10% WDG (w/w) + Bispyribac sodium 10% SC @ (25+25) g ha-1 (T2) , Bispyribac sodium 10% SC + Ethoxysulfuron 15% WDG (w/w) @ (25+15) g ha-1 (T5) which also recorded lowest weed density, relative weed density, weed dry matter and weed index. Among the herbicide treatments, the weed control efficiency was highest under Fenoxaprop-p ethyl 6.7% EC (w/w) + Ethoxysulfuron 15% WDG (w/w) (50+15) g ha-1 (T4) and at par with the same herbicide mixures as recorded against above mentioned parameters. So far as phytotoxic effects of the herbicides on rice were concerned, Flucetosulfuron 10% WDG (w/w) + Bispyribac sodium 10% SC @ (25+25) g ha-1 (T2) followed by XR-848 Benzyl Ester + Cyhalofop Butyl 12% EC (w/v) @ 150 (25+125) g ha-1 (T7) showed a little phytotoxic effects unlike other herbicide mixtures had negligible phytotoxic effect. However in the soil environment studies microbial biomass carbon content, fluoroscein diacetate hydrolase, dehydrogenase, urease acid and alkaline phosphatages, activities, population count of total bacteria, fungi, diazotrophs, phosphorous solubilising bacteria, Pseudomonas, actinomycetes were significantly influenced by the weed management treatments. The herbicides decreased the microbial populations and enzymatic activity drastically up to 3 to4 days after spray of herbicides, after which they started to recover gradually as time advanced and became normal up to 20 days after spray of herbicides proving them environmentally safe.ThesisItem Open Access ASSESSMENT OF GENETIC VARIABILITY IN RICE (Oryza sativa L.) GERMPLASM USING MOLECULAR MARKER(Indira Gandhi Krishi Vishwavidyalaya, Raipur, 2005-10) Acharjee, Sujan; Kumar, Arvind; Sahu, R.K.; Verulkar, S.B.; Pophaly, D.J.; Saxena, Ravi R.ASSESSMENT OF GENETIC VARIABILITY IN RICE (Oryza sativa L.) GERMPLASM USING MOLECULAR MARKERThesisItem Open Access STUDIES ON PRODUCTION TECHNOLOGY OF Pleurotus columbinus(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 1997) CHAURASIA, VIJAY KUMAR; THAKUR, M.P.; SHUKLA, C.S.; GEDA, A.K.; LAKHERA, M.L.STUDIES ON PRODUCTION TECHNOLOGY OF Pleurotus columbinusThesisItem Open Access STUDIES ON EFFECT OF SOME PHYSICAL FACTORS AND PADDY MICROFLORA ON Xanthomenas campestris pv. oryzae(Ishiyama)Dye et,al.,ISOLATE OF RAIPUR(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 1992) MISRA, PRASANT KUMAR; AGRAWAL, K.C.; THRIMURTHY, V.S.; KUMAR, S.M.; KAUSHIK, U.K.; RAI, A.L.STUDIES ON EFFECT OF SOME PHYSICAL FACTORS AND PADDY MICROFLORA ON Xanthomenas campestris pv. oryzae(Ishiyama)Dye et,al.,ISOLATE OF RAIPURThesisItem Open Access STUDIES ON MYCELIAL GROWTH AND SPOROPHORE PRODUCTION OF Pleurotus columbinus, OYSTER MUSHROOM(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 1998) SOLANKI, PIYUSH; THAKUR, M.P.; SHUKLA, C.S.; GEDA, A.K.; CHANDRAKAR, G.STUDIES ON MYCELIAL GROWTH AND SPOROPHORE PRODUCTION OF Pleurotus columbinus, OYSTER MUSHROOMThesisItem Open Access STUDY ON Sxlerotium rolfsii Saee. CAUSING COLLAR ROT OF CHICKPEA(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 2004-03) TRIPATHI, BRAJESHWAR PRASAD; KHARE, N.; KOTASTHANE, A.S.; SHARMA, R.N.; KHARE, C.P.; CHANDRAKAR, G.Chickpea is cultivated throughout the state of Chhattisgarh, but the average yield of chickpea is very low. One of the reason for poor yield is the negligence in the adoption of plant protection measures against pests & diseases. The collar rot disease of chickpea caused by Sclerotium rolfsii is soil borne and fast spreading, which cause considerable damage to the plant stand. Considering the importance of collar rot disease the present investigation entitled “Study on Sclerotium rolfsii Sacc. causing collar rot of chickpea” was carried out at the Department of Plant Pathology, I.G.A.U., Raipur (C.G.). In pathogenicity test, the fungi S. rolfsii was found to be highly pathogenic as they reduced the germination and cause very high seedling mortality. Six antagonists were evaluated under in vitro conditions. Best inhibition of Sclerotium rolfsii was obtained with Trichoderma spp. (PSR) followed by Trichoderma harzianum (Kanpur) and Trichoderma spp. (MBR). In pot culture, most effective species of Trichoderma were Trichoderma viride (Kanpur) and Trichoderma harzianum (Kanpur) against Sclerotium rolfsii as they increased the per cent germination of seeds and minimized the pre and post-emergence mortality over control. Potato dextrose agar media was best for the radial growth of S. rolfsii. followed by chickpea meal media. The best growth of fungus was observed at 300C followed by 350C. The pathogen was able to grow at a wide range of pH from acidic to alkaline i.e. 4 to 9 pH but it grew best on pH 5 followed by pH 6. Eight medicinal plants leaf extract were evaluated under in vitro condition. The radial growth of S. rolfsii was significantly less in leaf extract of Aswagandha followed by Vantulsi. 92 genotypes were screened for their resistance to collar rot disease. Out of these 3 genotypes found to be moderately resistant, one was moderately susceptible, four were susceptible and remaining 84 genotypes were highly susceptible to this disease. Complete inhibition of mycelial growth of S. rolfsii Sacc. was observed with Hinosan, Antracol, Mancozeb, Kitazin, Kavach under in vitro evaluation of fungicides. These fungicides also increased seed germination and decreased pre and post emergence mortality under pot culture technique.ThesisItem Open Access STUDIES ON FALSE SMUT OF RICE IN CHHATTISGARH REGION(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 2004-09) MURALEEDHARAN, ANISH; THRIMURTY, V.S.; AWADHIYA, G.K.; DANTRE, R.K.; SARAWGI, A.K.; CHANDRAKAR, G.STUDIES ON FALSE SMUT OF RICE IN CHHATTISGARH REGIONThesisItem Open Access TO STUDY THE EFFECT OF SUCCINIC ACID ON GROWTH,DEVELOPMENT AND YIELD COMPONENTS OF SUNFLOWER(Helianthus annus.L)cv MORDEN(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 2003-12) SONI, HARISH; KHAN, M.I.; GUHE, ARTI; KATIYAR, PRATIBHA; RAO, S.S.; CHANDRAKAR, B.L.TO STUDY THE EFFECT OF SUCCINIC ACID ON GROWTH,DEVELOPMENT AND YIELD COMPONENTS OF SUNFLOWER(Helianthus annus.L)cv MORDENThesisItem Open Access IMPACT OF MOISTURE REGIMES ON PHYSILOLGICAL, BIOCHEMICAL BEHAVIOUR AND YIELD ATTRIBUTES OF Lathyrus sativus L.(Indira Gandhi Krishi Vishwavidyalaya Raipur(c.g), 2004-09) VARDHAN, HARSH; GUHEY, ARTI; KATIYAR, P.; NANDA, H.C.; GEDA, A.K.; SAXENA, R.R.IMPACT OF MOISTURE REGIMES ON PHYSILOLGICAL, BIOCHEMICAL BEHAVIOUR AND YIELD ATTRIBUTES OF Lathyrus sativus L.