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ThesisItem Open Access Studies on Variability and Management of Collar Rot of Lentil incited by Sclerotium rolfsii (Sacc.)(RVSKVV, Gwalior (M.P.), 2021) Singh, Purnima; Singh, Dr. ReetiThesisItem Open Access Characterization of Pearl millet blast pathogen [Pyricularia grisea (Cooke) Sacc.] and its strategic management(RVSKVV, Gwalior (M.P.), 2021) Parihar, Prerana; Pandya, Dr. R. K.ThesisItem Open Access Enhancing genetic resistance to dry root rot disease {Rhizoctonia bataticola [Taub. (Butler)]} of chickpea through mutation and induced resistance(RVSKVV, Gwalior (M.P.), 2020) Chobe, Devashish Raju; Singh, Dr. ReetiThesisItem Open Access Studies on anthracnose of chilli (Capsicum annuum L.) incited by Colletotrichum capsici (Sydow) Butler and Bisby(2020) Bobade, Ashish; Shastry, P.P.ThesisItem Open Access Studies on Pyricularia grisea (Cooke) Sacc. causing blast of Pearl millet with special reference to its variability and management.(RVSKVV, Gwalior (M.P.), 2020) Singh, Priyanka; Pandya, Dr. R. K.ThesisItem Open Access Variability and management of Black scurf of potato (Rhizoctonia solani ) in central India(RVSKVV, Gwalior (M.P.), 2019) Singh, Prashant Kumar; Singh, Dr. ReetiThesisItem Open Access Studies on Dry Root Rot of Chickpea caused by Rhizoctonia bataticola (Taub.) Butler(RVSKVV, Gwalioir (M.P.), 2018) Patidar, Jagdish Kumar; Singh, Dr. ReetiThesisItem Open Access Studies on Sclerotinia stem rot an emerging threat in the Cultivation of Indian mustard (Brassica juncea (L.) Czern. Coss)(RVSKVV, Gwalior (M.P.), 2019) Fatehpuria, Pramod Kumar; Pandya, Dr. R. K.Studies on Sclerotinia stem rot an emerging threat in the Cultivation ofIndian mustard (Brassica juncea (L.) Czernj. Cosson)(Lib.) De BaryRapeseed–mustard groups of crops play a vital role in Indian economy. The crops of this group are vulnerable to major diseases such as Alternaria blight, Sclerotinia stem rot, White rust, Downy mildew and Powdery mildew. Out of these Sclerotinia stem rot caused by Sclerotinia sclerotiorum has become a major biotic threat in several parts of the country. In Madhya Pradesh, most of the area of these crops is comes under grid region of the state comprising Morena, Bhind, Gwalior, Sheopur, Shivpuri, Guna and Ashoknagar districts where the soil borne pathogen has established a key position, limiting the production of the crops particularly Brassica juncea.The present investigations were carried out during 2016-17 and 2017-18 at college of agriculture Gwalior on disease incidence, symptomatology, suitable media for mycelial growth, pathogenicity test, variability, epidemiological effect, screening of Brassica material for resistance reaction, control and management aspects.The maximum disease incidence was recorded in Morena, while minimum disease incidence was recorded in Ashoknagar district. Out of twelve evaluated culture medium Glucose agar medium is most suitable for Sclerotinia sclerotiorum maximum radial mycelial growth and maximum number of sclerotia formation rather than, rest of the medium. Five selective culture media against seven isolate of grid zone in which, Glucose agar media the Morena isolate gave the better growth performance.The highly virulent isolate with maximum mycelial growth (Morena) produces maximum lesion length on stem with higher oxalic acid content then other six remaining districts of grid zone. Morphological variation among the different isolates, the fast growing isolates viz., Morena Sheopur and Bhind were considered as virulent isolates in respect of radial growth, weight of sclerotia formation as compared to intermediate and weak isolates.Genetic variability studies using five Operon “A” series reveals considerable variation in seven isolate of Sclerotinia sclerotiorum. The maximum polymorphism was observed in 9 bands SS7 (Morena) followed by Bhind, Gwalior, Sheopur and Shivpuri exhibited intermediate number of bands ranging 5-8. While the minimum number of bands 4 were found in (SS1) Ashoknagar and (SS5) Guna. The phylogenetic analysis and constricted dendogram based on RAPD the (SS7) Morena was categorized as highly virulent and (SS1) Ashoknagar are weakly virulent and rest of the isolate SS2) Bhind, (SS3) Gwalior, (SS4) Sheopur, and (SS6) Shivpuri were categorized as moderate virulent isolate.Maximum relative humidity and minimum relative humidity influenced the lesion length, number of sclerotia, and size of sclerotia and weight of sclerotia positively and significantly whereas evaporation influenced it negatively and significantly.In disease reaction of Sclerotinia stem rot, none of the tested genotypes were found in the category highly resistant and resistant, however; six genotype was placed in moderately susceptible and three genotype was placed in category of susceptible, while seventy one genotype are place in category of highly susceptible.In field experiment, carbendazim found most effective against Sclerotinia sclerotiorum which was found at par with propiconazole.ThesisItem Open Access Studies on Alternaria blight (Alternaria cucumerina var. cyamopsidis (Rangaswami & V. Rao) Simmons) of Cluster bean(RVSKVV, Gwalior (M.P.), 2019) Sharma, Satish; Singh, Dr. Reeti