Browsing by Author "Mishra, A. K."
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OtherItem Open Access Annual Report(Indian Grassland and Fodder Research Institute, Jhansi, 2006) Zaoo, S. N.; Roy, M. M.; Pandey, K. C.; Roy, A. K.; Mishra, A. K.; Kumar, Anil; Pathak, P. K.; Srivastava, A. K.OtherItem Open Access Annual Report(2014-05-12) Zadoo, S. N.; Roy, M. M; Pandey, K. C.; Roy, A. K.,; Mishra, A. K.ThesisItem Open Access Expression, characterization and immunoprophylactic evaluation of toxoplasma gondii specific SAG2 and GRA 5 proteins(IVRI, Izatnagar, 2009) Singh, H.; Mishra, A. K.ThesisItem Open Access Management of Stem Gall Disease of Coriander caused by Protomyces macrosporus Unger(DRPCAU, PUSA, 2022) TRIPATHY, RUTUPARNA; Mishra, A. K.Coriander is one of the first spices to be used by mankind dates back to 5000BC. It is called as ‘Miraculous herb’ as all parts of the plant including seeds and leaves are used both as spice as well as herbal medicine. Among various diseases attacking coriander, stem gall disease caused by Protomyces macrosporusUnger is the most devastating disease resulting 16-50 per cent yield loss.Considering the seriousness of this disease, present investigation was carried out on various aspects viz., survey, germplasm screening and integrated disease management at T.C.A., Dholi campus of Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar during 2021-22. Survey conducted in two districts of Bihar i.e., Muzaffarpur and Samastipur revealed maximum and minimum mean disease incidence of 49.86 and 18.42 per cent in Muzaffarpur and Samastipur district respectively. Out of twenty coriander germplasm screened against the stem gall disease, only one germplasm (RD-23) found moderately resistant. Under disease management, minimum PDI of 20.17 along with maximum yield of 1713.89 Kg/ha over control was recorded in treatment involving seed treatment @10g/Kg seed & soil application @5g/ 3m2 of Trichoderma asperellum + foliar spray with a ready formulation containing Azoxystrobin 18.2%+ Difenoconazole 11.4% SC @0.1% at 45, 60 & 75 DAS. However, highest ICBR of 1:2.50 was realized in seed treatment with a fungicidal formulation containing Carboxin 37.5% + Thiram 37.5% WS @4g/Kg seed followed by foliar spray with a ready formulation containing Azoxystrobin 7.1%+ Propiconazole 11.9% SC @0.1% at 45, 60 & 75 DAS.ThesisItem Open Access Morpho-cultural variability and management of Colletotrichum capsici (Sydow) causing leaf spot disease of turmeric (Curcuma longa L.)(RPCAU, Pusa, 2023) Bhaskar, Ambarish; Mishra, A. K.Turmeric crop suffers very badly due to Colletotrichum capsici causing leaf spot disease in terms of both quantitative and qualitative losses across India and world. Especially in rainy season under humid condition, it affect the crop severely. Therefore, the current study was undertaken on Morpho-cultural variability and management of Colletotrichum capsici involving different culture media adjusted at different pH and at different temperature. In in vitro management of C. capsici, six different aqueous plant extracts and fungicides was used. In study of colony characters of different isolates of pathogen: different colour, shape, elevation with different type of margin and texture were observed under study. The interaction effect on mycelial growth of all three isolates on PDA media was found significant. However, the max. mycelial growth of 77.00 mm was recorded in isolate, V3 on 8th day. The interaction effect on mycelial growth of all three isolates on CDA media was found non-significant. However, the max. mycelial growth of 90.00 mm was recorded in isolate V2 and V3 on 8th day. Irrespective of isolates, statistically significant max. mycelial growth of 89.33 mm was found on 8th day followed by 79.83 on 6th day respectively. In interaction effect of different isolates at different time interval in RSA media, max. mycelial growth of 90.00 mm followed by 81.50 were found in isolate V3 on 8th and 6th day respectively. At 5 per cent conc., min. mycelial growth of pathogen (35.33 mm) followed by 49.33 mm and consequently 60.74 and 45.19 per cent inhibition in pathogen growth over absolute check was recorded in culture media amended with aqueous extract of Ashoka and tobacco respectively. Irrespective of botanicals used, min. mycelial growth was observed at 15% conc. followed by 10% conc. and both of these conc. was found to be statistically significant in their effect. At 100 ppm, no mycelial pathogen growth was observed in ready mixture of Azoxystorbin 7.1% SC + Propiconazole 11.9% SC (Azoxy P) followed by Propiconazole 25% SC (Tilt). Here, both treatments were found to be statistically significant in their effect. At 250 ppm conc., no mycelial growth was found in ready mixture of Azoxystorbin 7.1% SC + Propiconazole 11.9% SC (Azoxy P) and Propiconazole 25% SC (Tilt) used as standard check, followed by Hexaconazole 5% EC (Contaf). These treatments were found statistically significant in their effect in supressing pathogen growth. At 500 ppm conc., no mycelial growth was observed in ready mixture fungicide, Azoxystorbin 7.1% SC + Propiconazole 11.9%SC (Azoxy P), Propiconazole 25% SC (Tilt) used as standard check and Hexaconazole 5% EC (Contaf) followed by ready mixture of Azoxystorbin 11% SC + Tebuconazole 18.3% SC (Suzuki). Irrespective of fungicides used, min. mycelial growth of pathogen was observed at 500 ppm conc. followed by 250 ppm conc. and effect of both the conc. on pathogen growth were found statistically significant. In interaction effect of different fungicides, no growth of pathogen was observed in ready mixture fungicide of Azoxystorbin 7.1% SC + Propiconazole 11.9%SC (Azoxy P) at all conc., used. Propiconazole 25% SC (Tilt) used as standard check at 250 ppm and 500 ppm and Hexaconazole 5% EC (Contaf) at 500 ppm followed by ready mixture of Azoxystorbin 11% SC + Tebuconazole 18.3% SC (Suzuki) and all these treatments were found statistically significant, over absolute check in their effect.ArticleItem Open Access Open Access: Making Science Research Accessible(2011) Gutam, S.; Aneeja, G.; Mishra, A. K.; Chandrasekharan, H.ArticleItem Open Access Prediction of miRNAs in Bombyx mori through Computational Approaches(2004) Mishra, A. K.; Lobiyal, D. K.ThesisItem Open Access Production and Marketing of Vegetables in Rajkanika Block of Kendrapart District of Orissa.(Orissa Univesrity of Agriculture and Technology; Bhubaneswar, 2008) Nayak, Swarup Ranjan; Mishra, A. K.ThesisItem Open Access Studies on Colletotrichum leaf spot disease of turmeric (Curcuma Longa L.)(Rajendra Agricultural University, Pusa (Samastipur), 2013) Kumar, Abhishek; Mishra, A. K.Turmeric (curcuma longa L.) is an important spices crop and emerged as a high valued cash crop for intercropping in agro-forestry plantations. Among various diseases attacking turmeric, Colletotrichum leaf spot caused by Colletotrichum capsici is the most divesting disease. The present investigation was undertaken on epidemiology and management of this disease. Effect of environmental factors on development and progress of Colletotrichum leaf spot disease is important in order to device an appropriate and effective disease management strategy. Simple correlation, simple linear regression and multiple linear regression analysis were performed on epidemiological observations to establish relationship in between disease incidence and weather parameters. Progress of Colletotrichum leaf spot disease of turmeric is differing with different genotypes and interaction of different weather factors prevailing during crop season. The minimum intensity of disease i.e., initiation of incidence (PDI) was recorded as 4.00 during second week of September with 33.20oC max. temp., 25.97oC min. temp., 87% morning RH, 71.81% evening RH, 06.00 km/h wind velocity, 4.63 hr/day BSSH and 0.97 mm rainfall. Whereas maximum PDI was recorded as 66.00 with 14.30oC max. temp., 8.24oC min. temp., 93% morning RH, 78% evening RH, 3.2 km/hr wind velocity and without bright sun shine hours and rainfall. The periodic increase in disease intensity was maximum during beginning of 3rd week of October (127DAP). At this stage of maximum periodic increase in disease development was found favoured by max. temp. (32.14oC) min. temp.(21.4oC), morn.RH (89%), eve.RH (70%), BSSH (7.9h/day) and wind velocity (2.7km/hr.). A highly significant negative correlation was found between PDI and min. temp. (r = -0.975), wind velocity (r = -0.809), max. temp. (r = -0.758) and rainfall (r = -0.499) while it was found positive in case of morn. RH (r = -0.517). Simple linear regression analysis revealed that a negative regression co-efficient for all the weather parameters considered with PDI except morning RH. Highest regression co-efficient (b) of 0.951 followed by 0.654 in case of min. temp.and wind velocity respectively. Multiple regression analysis revealed variation in co-efficient of determination (R2) from 0.574 to 0.990 indicating the range of variation in disease development minimum being 57 per cent when only max. temp. was taken into consideration and gradually attained maximum limit of 99 per cent based on the combine contribution of all weather parameters considered under study. Under germplasm screening, altogether 15 germplasm were evaluated against Colletotrichumcapsici under natural conditions. The varietal screening indicated the maximum PDI (65.00) in Morangia (Susceptible check) and minimum PDI (17.50) in RH-403. Five genotypes viz., RH-7, RH-50, RH-403, RH-411 and RH-412 was found moderately resistant against the diseases. Minimum PDI (13.33) with highest rhizome yield (35.13t/ha) fallowed by PDI (16.67) and rhizome yield (34.42t/ha) was recorded in four numbers of spray with Zineb @0.3% followed by Tricyclazole @0.1% at fortnightly interval. Best incremental cost benefit ratio (1:10.64) was recorded under the treatment where the crop was sprayed with Hexaconazole @0.1% followed by ICBR of 1:9.38 with fungicidal spray of Tricyclazole @0.1%.ThesisItem Open Access Studies on efficacy of biocontrol agent and chemical fungicide against collar rot disease of elephant foot yam [Amorphophallus paeoniifolius (Dennst)](DRPCAU, Pusa, 2020) Sankranti, Akshay; Mishra, A. K.Elephant foot yam [Amorphophallus paeoniifolius (Dennst)] is commonly known as ‘king of tuber crops’ due to its higher biological efficiency, cultivated commercially in the districts of Muzaffarpur, Samastipur, Vaishali, Bagusarai and East Champaran of Agro-climatic Zone-1 of Bihar and regarded as money spinning crop. Among various diseases affecting elephant foot yam, collar rot disease caused by Sclerotium rolfsii causes significant yield loss to the tune of 20 to cent per cent. Considering seriousness of this disease, present investigation was carried out in experimental plot Tirhut College of Agriculture, Dholi, Muzaffarpur (Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar) during 2019-2020. Three broad objectives i.e., survey for prevalence of collar rot disease in elephant foot yam, germplasm screening against collar rot disease and management of collar rot disease through biocontrol agent and chemical fungicide were considered during study. Survey was conducted twice in crop growth period in Samastipur and Muzaffarpur district. Elephant foot yam grown in Samastipur district was found more prone to collar rot disease compared to Muzaffarpur district with increase in incidence of disease during August to September. Twenty number of germplasm were screened against disease including elephant foot yam variety, Gajendra (check) against collar rot disease. Among the screened germplasm, two germplasm viz., TCA EFY-16 and TCA EFY-13 emerged as a resistant germplasm with no disease incidence (0%) and high value of growth attributing characters and yield of 46.04 and 44.97 t/ha respectively. Field efficacy of biocontrol agent and chemical fungicide against collar rot disease was evaluated wherein corm treated with Trichoderma @5g/kg corm + soil application with Trichoderma grown in FYM @ 2.5 kg/pit + soil application twice with Trichoderma grown in FYM @250g/ plant (T6) resulted in minimum disease incidence at different fortnight interval i.e, 5.55% (75 DAP), 7.84% (90 DAP), 6.38% (105 DAP) and 4.52% (120 DAP) with overall 22.22% disease incidence with maximum disease reduction over control (52.94%) and highest yield (34.85 t/ha). Feasibility of treatment in economic terms was calculated by incremental cost benefit ratio (ICBR). The highest ICBR of 1: 2.57 with net profit over control was realized as Rs 134294/ha in treatment where corm were treated with Trichoderma @5g/kg corm + soil application twice with Trichoderma grown in FYM @250g/ plant (T2).ThesisItem Open Access Studies On Irrigation Water Management For Tea Plantation Areas Of Lower Assam(IARI, Division of Agricultural Engineering : New Delhi, 1995) Mishra, A. K.; Sarkar, T.K.ThesisItem Open Access Studies on leaf blotch disease of turmeric (Curcuma longa L.)(DRPCAU, Pusa, Samastipur, 2019) kumar, Mukul; Mishra, A. K.Turmeric (Curcuma longa L.) known as golden spice as well as “spice of life” has emerged as low volume high value crop. Among various diseases attacking turmeric, leaf blotch disease caused by Taphrina maculans Butler is one of the most serious disease. Turmeric yield losses due to this disease have been recorded upto 37.6-52.9 per cent. Considering the seriousness of this disease, present investigation was carried out on various aspects viz., survey, germplasm screening and evaluation of botanicals, fungicides and resistance inducing chemical against leaf blotch disease of turmeric at T. C. A., Dholi, Muzaffarpur (Dr. Rajendra Prasad central Agricultural University, Pusa, Samastipur, Bihar) during 2018-19. The fungus isolated from the diseased turmeric leaf was confirmed as Taphrina maculans by observing and comparing blastospore measurement with previous reports. Survey results indicated that leaf blotch was observed in all the villages of Samastipur and Muzaffarpur district. Muzaffarpur district was found more prone to leaf blotch disease compared to Samastipur district. There was an increase in the disease incidence during September to November. Among 16 turmeric germplasm screened against the leaf blotch disease, three and eight germplasm showed Resistant and Moderately Resistant reaction respectively. Neem (6% aqueous extract) followed by brahmi (6% aqueous extract) were found most effective plant extract under in-vitro conditions against T. maculans. Under disease management, rhizome treatment alongwith three foliar spray of Tricyclazole 75 WP (0.1%) at fortnightly interval starting from appearance of disease incidence resulted lowest PDI (26.67) and highest rhizome yield (37.85 t ha-1) consequently with 49.99 per cent disease reduction and 55.75 per cent yield increase over control was recorded. Maximum incremental cost benefit ratio (1:16.34) was exhibited by the same treatment.ThesisItem Open Access Vegetable Production and Market5ing in Basta Block of Balasore District(Orissa Univesrity of Agriculture and Technology; Bhubaneswar, 2012) Das, Bipin Bihari; Mishra, A. K.