Browsing by Author "Acharya, G.C."
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Item Antifungal activity of some plant extracts against ganoderma lucidum (curtis ex.fr.) karst., causing basal stem rot disease in arecanut(2014) Chakrabarty, R.; Acharya, G.C.; Sarma, T.C.Basal stem rot disease caused by the fungus, Ganoderma lucidum (Curtis Ex. Fr.) Karst, is the most dreaded disease of arecanut in Assam. The experiment was carried out to test the antifungal activity of aqueous extract of thirty locally available plant species against the test fungus. Pure culture of Ganoderma sp. was isolated from fruiting body of infected arecanut palm. Among the plant species tested, Allium sativum corm extract exerted maximum inhibition with 90.89, 100 and 100 per cent inhibition over control at 5, 10 and 20 per cent conc. respectively, followed by extract of Solanum nigrum with 77.00. 84.11 and 100 per cent inhibition over control at 5, 10 and 20 per cent conc. respectively after 144h of incubation. Leaf extract of Clerodendron infortunatum, Bidens pilosa, Leucas aspera, Spilanthes paniculata, Lawsonia inermis and Cinnamomum verum showed strong inhibitory effect at 20 per cent conc. with 84.00, 83.88, 79.22, 77.22, 76.11 and 72.78 per cent inhibition over control respectively.Item Arecanut based cropping system: Alternative pathway to achieve sustainability in North Eastern India(2014) Acharya, G.C.; Singh, L.S.Item Button shedding and premature nutfall in coconut palms grown in littoral sand as influenced by the growth regulator treatments(2006) Sahoo, S.C.; Dora, D.K.; Acharya, G.C.; Pradhan, P.K.Item Comparative perfomance of different hybrid combinations of oil palm under Sub-Himalayan Terai region of West Bengal(2006) Acharya, G.C.; Chenchaiah, K.C.; Sit, A.K.; Niral, V.; Nampoothiri, K.U.K.Item Comparative study of different turmeric cultivars in areca-based cropping system and open field under Sub-Himalayan Terrai Region of West Bengal(2004) Arun Kumar Sit; China Chenchaiah, K.; Acharya, G.C.; Barman, J.R.A total of eleven turmeric cultivarshnes were evaluated for their perfonnznce in the panial shade of arecanut canopy and open condition under Sub-Himalayan Terai region of West Bengal. The cultivar Suguna gave the highest yield (29.04Vha) followed by CLS-2A (27.41 uha) and Kasturi (26.22Vha) under areca shade and the cultivar Sudarsana produced maximum fresh rhizomes (44.53 Whai) followed bv Suruna (38.53wha) and Kasluri 138.05 ma1 in noencondinon. Sudarsana and Kasturi also performed well in arecashadc bul the yield was lowerthanin the open condition: the mean internodal distanceand yield per plant were responsible for the higher yield. This is supponed by moderately higher numhers of secondary fingers and mother rhizome weight. The cultivar Suguna is also found to be tolerant to Cerrosponr leaf spot under the panial shade of areca canopy.Item Critical levels of macro and micro-nutrients in coconut leaves in littoral sandy soil(2006) Acharya, G.C.; Dash, D.K.Item Disease index for basal stem rot of arecanut in North East India(2014-08) Acharya, G.C.; Ranajana Chakrabarty; Himadri Rabha; Sandip ShilItem Diurnal variations in the mineral composition of coconut leaves(2006) Acharya, G.C.; Dash, D.K.; Sahoo, S.C.Item Economics of intercropping vegetables and flowering crops in pre-bearing arecanut garden under Assam condition(Indian Society for Plantation Crops, 2007-08) Ray, A.K.; Borah, A.S.; Maheswarappa, H.P.; Acharya, G.C.A field trial was conducted at Central Plantation Crops Research institute, Research Centre, Kahikuchi (Assam) to evaluate the performance of different vegetables and flowering crops in pre-bearing arecanut garden. Two year (2003-05) results indicated that, vegetable crops like radish, cabbage, cauliflower and brinjal performed well and resulted in higher net return and B:C ratlo (4.0 to 5.0) and higher return per rupee invested during winter season. Among flowering crops, marigold and chrysanthemum performed well and resulted in higher B:C ratio (2.05 to 2.43) compared to gladiolus.Item Effect of different doses of fertilizers on arecanut(Areca catechu) varieties under sub himalayan terai of West Bengal(2008-03) Arun Kumar Sit; Acharya, G.C.; Roy Barman, J.Item Effect of fungicides, Trichoderma and plant extracts on mycelial growth of Thielaviopsis paradoxa, under in vitro condition(2013) Chakrabarty, R.; Acharya, G.C.; Sarma, T.C.Stem bleeding disease caused by Thielaviopsis paradoxa is one of the major diseases of coconut and is prevalent in almost all the coconut growing countries. The present study was carried out to test the efficacy of antagonist, fungicides and plant extracts in inhibiting the pathogen, under in vitro condition. Thielaviopsis was isolated from young lesion of affected coconut palm of CPCRI, RC, Kahikuchi, Guwahati. Among the three species of Trichoderma tested so far, T. viride was found to be the most effective with 61.62% inhibition followed by T. harzianum and T. virens with 60.80 and 59.49 per cent inhibition, respectively, over control after 96h of incubation period. The fungicides, Calixin (Tridemorph 80EC) @ 0.3% showed 100 per cent inhibition over control whereas Ridomil MZ-72, Blitox-50 and Bavistin showed 92.00, 91.55 and 91.44 per cent inhibition over control after 144h of incubation, respectively, Among the forty five plant extracts tested, the aqueous extract (10%) of Allium sativum, exerted 100 per cent inhibition of the pathogen over control after 48h, 72h and 96h of incubation compared to other extracts.Item Effect of organic and inorganic sources of nutrients on soil fertility status of arecanut (Areca catechu) in north-east India(2015-10) Acharya, G.C.; Paul, S.C.; Chakrabarty, R.; Ray, A.K.Item Effect of soil mixtures on germination and growth of arecanut seedlings under sub-himalayan terai region(2014) Arun Kumar Sit; Acharya, G.C.; Chenchaiah, K.C.Item Effectiveness of training - cum - demonstration on increasing return from coconut plantations under rainfed condition in Assam(2006) Indrajit Barman; Ray, A.K.; Maheswarappa, H.P.; Acharya, G.C.Item Evaluation of substrates for multiplication of bio-agent, Trichoderma viride(2014-06) Chakrabarty, R.; Acharya, G.C.; Sarma, T.C.Item Feasibility of black pepper cultivation on shade trees of tea garden in sub Himalayan Terai region(2007) Arun Kumar Sit; Chenchaiah, K.C.; Acharya, G.C.Item Feasibility of vegetable intercropping in arecanut garden under sub Himalayan terai region of West Bengal(2006) Arun Kumar Sit; Acharya, G.C.; Chenchaiah, K.C.; Avrajyoti GhoshA study was conducted with 25 different vegetable crops during different seasons as intercrops in partial shade of arecanut garden (36 years old) under sub Himalayan terai region of West Bengal. Yield. input, output and benefit cost ratio were calculated for all the crops. B : C ratio of all the crops ranged between 0.37 (bitter gourd) to 3.44 (cabbage). However. all the vegetables tested were found profitable. Crops like palak. cabbage, cauliflower. raddish, carrot, turnip, chilli and capsicum can be taken as winter vegetables and basella. pumpkin. ash gourd, bottle gourd and snake gourd can be taken as summer vegetables in partial shade of arecanut garden.Item Forecasting of arecanut market price in north eastern India: ARIMA modelling approach(2013-12) Sandip Shil; Acharya, G.C.; Jose, C.T.; Muralidharan, K.; Sit, A.K.; George V. ThomasThe paper deals with forecasting of minimum, maximum and average arecanut (Areca catechu L.) prices in the major arecanut markets of the Assam as well as Meghalaya based on the monthly price data. Monthly minimum, maximum, and average market price data of arecanut (in Rs./quintal) for the period May-2003 to March-2012 (for Assam) and February-2003 to March-2012 (for Meghalaya) were used. Box-Jenkins autoregressive integrated moving average (ARIMA) methodology was adopted for developing the models. An interrupted time-series model was also applied to resolve the problem of intervention point (October-2011) for Meghalaya price data. The proposed models were ARIMA (1, 0, 1), ARIMA (1, 1, 1), ARIMA (0, 1, 1) (for Assam market price data series) and, log ARIMA (0, 1, 1), log ARIMA (1, 0, 1) with linear trend and a man-made intervention (Oct-2011) and log ARIMA (0, 1, 1) with linear trend and a manmade intervention (Oct-2011) (for Meghalaya market price data series) for minimum, maximum, and average monthly price series, respectively.Item Ganoderma disease of arecanut in Assam(2008) Ray, A.K.; Chakrabarthy, R.; Acharya, G.C.Item Influence of integrated nutrient management on the performance of coconut palm in littoral sand(2004-12) Sahoo, S.C.; Dilip K. Dora; Acharya, G.C.; Panda, J.M.