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ThesisItem Open Access PATHOGENIC POTENTIAL AND MANAGEMENT OF SEED MYCOFLORA OF PIGEONPEA [Cajanus cajan (L.) MILLSP.](Plant Pathology Dept., N.M.C.A., NAU, Navsari, 2015-05) Chaudhari, Ankit K.; Sharma, HemantSeed infecting fungi are important constraints for the pigeonpea crop grown during Kharif season. Investigation was carried out on certain aspects related to seed health including isolation of pigeonpea seed infecting fungi, symptomatology induced by seed infecting fungi, impact of seed infecting fungi on seed health status in respect of seed germination and seedling vigour, effect of culture filtrates of seed infecting-fungi on seed germination and seedling growth, effect of seed infection on seed quality, screening of known antagonists as bio-priming agent and phyto-extracts to control seed borne fungi in vitro, management of seed infecting fungi through seed treatment with chemicals. Investigation was carried out during 2014 at Department of Plant Pathology N. A. U., Navsari. Infected seeds samples of pigeonpea collected from field grown pigeonpea crop of farmer’s fields of Navsari district and Pulse Research Station Farm, N. A. U., Navsari, revealed the b varieties of symptoms viz; discoloured seeds, shrivelled, damaged, inert matter and healthy seeds. Isolation of seedinfecting fungi was done by standard blotter method and PDA plate method. Isolation by both methods revealed the association of Alternaria alternata, Fusarium oxysporum, Fusarium moniliforme, Fusarium udum, Drechslera sp., Curvularia lunata, Rhizoctonia sp., Aspergillus niger and Aspergillus flavus. In pathogenicity test, highest per cent pre-emergence mortality was observed in seeds inoculated with Aspergillus niger (58.00% & 57.50%) in in vitro and in vivo test, respectively. Whereas, highest post-emergence mortality was recorded in Aspergillus niger (64.29%) in in vitro and Fusarium oxysporum (68.18%) in in vivo test. All nine different fungi significantly hampered seed health status as evident from artificial inoculation of seed. Overall, fungi induced 6.18 to 42.26, 9.28 to 57.80 and 20.48 to 60.61 per cent reduction in seed germination, shoot length and root length over healthy seeds, respectively. Seed inoculation with Aspergillus niger significantly reduced the germination (56.00%), minimum shoot length (4.00 cm), root length (5.25 cm) and seedling vigour index (518.20). Seeds inoculated with culture filtrate of Aspergillus niger revealed significantly the lowest seed germination (43.00%), minimum shoot length (3.30 cm), root length (4.70 cm) and seed vigour index (344.20) over control. c Highest reduction in seed protein (58.17%) and TSS content (52.00%) was observed in discoloured seeds while, decrease lipid content (55.25%) in shrivelled seeds over control. Seed bio-priming with Trichoderma viride recorded highest seed germination (88.00%), shoots length (9.03 cm), root length (11.17 cm) and gave highest seedling vigour index (1777.46). While, seed treated with Neem seed extract @ 1 % gave highest seed germination (78.67%), shoots length (7.97 cm), root length (9.20 cm) and highest seedling vigour index (1350.00) in phyto-extracts. Seeds treated with metalaxyl 8% + mancozeb 64% @ 0.2 % gave highest germination (93.33%), shoot length (11.23 cm), root length (13.67 cm) and seedling vigour index (2323.73).ThesisItem Open Access Determination of residues of carbaryl and endosulfan on in mango fruits(Department of Entomology NAU, Navsari, 1978-08) Valand, Vitthalbhai Maganbhai; Shah, A. H.ThesisItem Open Access Effect of Bulb size and GA3 on veetative and Floral characters of Tuberose [Polianthes tuberosa l.] CVS. Prajwal and Calcutta single(Floriculture and Landscaping Department, Aspee College of Horticulture and Forestry Gujarat Agriculture University, Navsari, 2010-05) Khushalrao, Wagh Vishal; Chawla, S. L.ThesisItem Open Access The Effect of Soil Application of NP and K On the yield and Leaf composition in Chiku (Achras sapota L) cv. Kalipatti(Horticulture Department, N. M. College of Agriculture, Navsari Agriculture University, 1978-09) Kachhadia, Babubhai Thakarashibhai; Narasiwham, BThesisItem Open Access Determination of Residues of Carbaryl and Endosulfan On in Mango Fruits(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 1978-08) Valand, Vitthalbhai Manganbhai; Shah, A. H.This study on the determination of residues of carbaryl and endosulfan on/in mango fruits is in partial fulfilment of the M. Sc. (Agri.) Course which VALAND VIT'l'HALBHAI MAGANBHAI has taken up under the direction of Dr. Shah A. R., Professor and Head, Department of Entomology, N. M. College of Agriculture, Navsari. Chemioal and micro bio-assay of residues of recommended insecticides, viz., carbaryl and endo.ulfan which were used at the concentration of 0.2 per cent and 0.075 per cen~respectivel~ as schedule of spraying in 1976-77 and only one spraying in 1977-78 as a part of insect pest management programme in mango crop have been carried out. In the chemical assay the residues of carbaryl on the mango fruits found immediately after the last spraying was 58.15 ppm in 1976-77, and the same after 3rd, 7th and 25th days were 37.22, 18.49 and 10.30 ppm respectively. Similarly, it was 52.56 ppm as initial deposit in 1977-78 and the same after 3rd, 7th and 19th day of one spraying were 38.00, 20.50 and 8.80 ppm respectively. 'thus the reduction percentage of carbaryl residue found were 36.00, 50.32 and 65.71 per cent in 1976-77 and 27.70, 61.00 and 83.26 per cent in the year 1977-78 on 3rd, 7th and 25th/19th day after spraying of oarbaryl respectively. The half life of carbaryl residues wes· 3.19 and 3.00 days in 1976-77 and 1977-7.8 respectivelyThesisItem Open Access Problems of Mango Growers of Valsad District (South Gujarat)(Extension Education Department, N. M. College of Agriculture Gujarat Agricultural University Navsari, 1993-04) Patel, Sunilkumar Ramabhai; Patel, Ramabhai B.ThesisItem Open Access Effect of Plant Growth Regulators on Growth and success of Stem Cuttings of Black Pepper (Piper nigrum L.) Cv. Panniyur-1(Plantation, Spices, Medicinal and Aromatic Crops Aspee College of Horticultue and Foretry, Navsari, 2012-09) Balvantsinh, Parmar Shruti; Padhir, B. V.ThesisItem Open Access Responce to Different levels of NPK based on soil test recommendation on yield content and uptake of nutrients by wheat J-24(Agricultural Chemistry and Soil Science Department, N. M. College of Agriculture Gujarat Agricultural University, Navsari, 1979-09) Kalathia, Ramjibhai Jadavbhai; Mehta, P. M.ThesisItem Open Access Seasonal Incidence, Varietal Screening and Assessment of Crop Loss by Sweet Potato Weevil, Cylas formicarius (Fabricius)(Agricultural Entomology Department, N. M. College of Agriculture, Gujarat Agricultural University, 2011-06) Mahida, Rajvirsinh D.; Saxena, S. P.