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ThesisItem Open Access Studies on management of Sclerotinia stem rot (Sclerotinia sclerotiorum) of chickpea (Cicer arietinum(SARDAR VALLABHBHAI PATEL UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, MEERUT- 250110 (U.P.),, 2021-12) AKANKSHA; Dr. Prashant MshraDEPARTMENT OF PLANT PATHOLOGY SARDAR VALLABHBHAI PATEL UNIVERSITY OF AFRICULTURE & TECHNOLOGY, MEERUT-250110 (U.P.) INDIA Name: Akanksha Advisor: Dr. Prashant Mishra (Professor) Id. No: 3240/19 Department of Plant Pathology Degree Progamme: M.Sc. (Ag.) Plant Pathology Thesis title: Studies on management of Sclerotinia stem rot (Sclerotinia sclerotiorum) of chickpea (Cicer arietinum). ABSTRACT Chickpea (Cicer arietinum Linn.) is known in this country since ancient times. Chickpea belongs to family Leguminosae & genus Cicer. It is one of the oldest pulses known and cultivated in Asia and Mediterranean. The center of origin of chickpea is stated to be eastern Mediterranean. Chickpea is a major pulse crop and accounts for nearly 75 per cent of the total pulse production in the world. In India,chickpea is grown on an area of 9.93 mha with a production of 7.59 mt and productivity is 960kg/ha. In UP it is grown over 589 thousand hectares area with annual production of 596.7 thousand tonnes and productivity of 1013 kg ha-1, respectively.Chickpea is prone to attack by various diseases like, Fusarium wilt (Fusarium oxysporum f. sp. ciceri), dry root rot (Rhizoctonia bataticola), collar rot (Sclerotium rolfsii), wet root rot (Rhizoctonia solani), Aschochyta blight and Sclerotinia stem rot (Sclerotinia sclerotiorum). Among these, stem rot caused by Sclerotium sclerotiorum is gaining importance. This disease is a serious threat, the extent of losses from 20 to 46 per cent at pod bearing stage of the crop and the incidence of disease varied from 18 to 32 per cent. The infected plant become pale in colour with white puff mycelial growth on the stem, later the plant dries and ultimately dies.In all the tested fungicides viz:, Thifluzamide 24%SC, Thiophanate methyl 70% WP, Hexaconazole, Propiconazole 13.9% + Difenconazole 13.9% EC, Carbendazim 12% + Mancozeb 64% that is completely inhibited (T5,T6,T7,T8) Sclerotinia sclerotiorum mycelial growth at 48hrs, 96hrs and 144hrs. at all three concentrations examined, 50ppm, 100ppm, and 150ppm. Among all the tested bio-agents in vitro, Trichoderma harzianum was found highly effective with maximum inhibition percent of 76.30% followed by Trichoderma viride with inhibition percent of 71.85% against the mycelial growth of the pathogen in vitro. Among all the crops sown at different dates the maximum disease incidence (47.33%) was recorded in 25th November sown crop and least disease incidence was recorded in 25th October sown crop (20.33%). Maximum grain yield 10.5 qutl./ha was recorded in 25th October followed by 9 qntl/ha While minimum yield 5.66 qntl/ha was recorded in 25th November sown crop . In experiments dealing with the intigrated management of the pathogen at technology park in the university campus the soil application of Neem Cake highly effective with the lowest per disease incidence of 6.57% was recorded followed by Seed bio-priming with Trichoderma harzianum with disease incidence of 7.44%.The maximum yield/ha and test weight was recorded in Soil application of Neem Cake of 21.96 Q/ha and 19.88gm respectively followed by Seed bio-priming with Trichoderma harzianum of 18.89 Q ha-1 and 19.05g respectively. (Prashant Mishra) (Akanksha) Advisor Author VITAE
