Achievements

  • Established an NABL accredited, state-of-the-art analytical laboratory for pesticide residues at Kolkata.
  • Released two new clones TTRI (Tocklai Tea Research Institute) 1 and TTRI 2 in 2014 raising the total number of Tocklai Vegetative clones released so far to 33. TTRI 1 is developed from Betjan progeny with a yield potential of 4000 kg/ha. TTRI 2 is a quality clone suitable for orthodox tea.
  • Released bi-clonal seed stock TSS 1, a High yielding quality seed stock for plains in Sep 2015. It is a combination of TV13 X TV17 with a yield potential of 3500 KMTH.
  • A quality seed stock for Darjeeling hills due for release obtained from combination of AV2 X P312.
  • Released Langree 51 and 56 garden Series clones. These clones were selected from a cross between Assam and China seed population of Lengree tea estate in Karbi Anglong District of Assam. The Lengree 51 and 56 are relatively tolerant to drought and the yield and quality are at par with other good clones.
  • Release of the clone, TV 31. This clone was selected from the progeny of a cross between TV-1 and TV-18. The clone has both good yield and quality.
  • Development of simple technique for top replacement by Cleft Grafting for getting vigourous plants and with better yield and quality. The technology is released to the industry
  • Anadenanthera peregrine is a leguminous shade tree released to the Industry during 2007-08. The shade species retains leaf throughout the year and has been found to be popular among tea growers. A large no. of seedlings has been distributed to the tea planters of North East India.
  • Developed catchment-wise integrated drainage system through remote sensing and GIS towards solving waterlogging at micro-level. Five pilot areas watersheds were studied in Assam and west Bengal for the purpose. The findings of the project are being applied in solving drainage problems.
  • A mobile platform based wireless sensor network system has been developed to determine and map some of the soil properties in situ. The platform is already working in commercial gardens.
  • A new enriched vermicompost technology developed. The enrichment is done by different mined and natural sources so that it can be used in organic gardens also. The technology is already disseminated to gardens and has been widely adopted
  • New planting pit mixture develop with enriched vermicompost which replaced the old cattle manure and fertilizers. Its application @250-300 g/pit at the time of tea planting is viable alternative to conventional cattle manure + 30 g SSP + 30 g Rock phosphate and is highly cost effective.
  • Developed technology for producing vermiwash and using it as foliar application (5-10%), which has been found to be effective on the growth and productivity of young and unpruned mature tea. It is eco-friendly and is one of the best liquid organic manure for foliar application in tea.
  • Developed technology for reducing compaction under heavy soils. Application of semi decomposed vermicompost/vertical mulching in trenches in alternate rows during LP year is more effective than the present practice of forking and hoeing
  • A package of practices for organic tea productions was developed. The package was based on field experiments conducted under Assam conditions. A book was published on agro technology of organic tea and distributed to end users for effective implementation
  • Soils of South Bank was found to be associated with lower content of available (<30 ppm) sulphur. Therefore, a need based recommendations of sulphur was made. A manual was published on Sulphur recommendation and distributed to end users.
  • Developed technology for reduction of Inorganic fertilizer input (up to 20%) by addition of organic matter grown in situ.
  • VAM and AZOVAM (dual inoculation) Technology developed for tea nursery and young tea mainly for use in planting pit.
  • A technology has been developed on bio control of termite pests by using Metarhizium anisopliae, an entomopathogen, isolated from live wood eating termite population of Cachar district, Assam. Mass production technology of Metarhizium anisopliae has been standardized and process is on for dissemination of the technique.
  • Beauveria bassiana, an entomopathogenic fungus has been found to be infectious to tea mosquito bug. Laboratory and field trial carried out at Tocklai demonstrated its effectiveness against this pest. A formulation has been developed at Tocklai. The technology has been used by tea gardens of North East India.
  • Major initiative launched for the control of Looper pest (H. taleca) and successful control measures (including light traps) developed in trials on commercial gardens in both Assam and Dooars. The technology is now successfully used by various tea gardens
  • A microbial preparation PGPR (plant growth promoting rhyzo-bacteria) known to have plant growth promoting effect and can induce plant resistance to pest and disease has completed successful trial in 5 commercial gardens and is in the process of dissemination to tea gardens. Research on PGPR is continuing.
  • Initial studies on mining of native phosphates using phosphate solubilising microbes is completed and commercial trials are in progress.
  • Developed Neem Kernel Aqueous Extract (NKAE) technology for tea pests/diseases control and has been successfully tested in commercial gardens. The technology is disseminated to tea estates across Assam and Dooars
  • Established a Model Tea Factory (MTF) for optimization and control of tea processing and manufacturing processes. A process technology for improvement of brightness of liquor by controlled withering is developed. Categorization of clones based on withering and fermentation has been made and disseminated to the Industry.
  • A technology of jute-based alternative packing material has been developed and demonstrated to the Industry.
  • A Modified Rolling Table (MRT) has been developed to improve the performances of the orthodox table roller with higher out-put and lower power consumptions. Trials were conducted at Teesta valley T.E. and Sungma T.E. Darjeeling. It was observed that there is an average saving of rolling time alongwith gain in leaf grade and quality. A bulletin was published on modified rolling table for end users
  • Tea tablets have been developed by using tea extract, which is spray dried and the powder is formulated to produce tea tablet. A patent has been granted on this new invention.
  • A process for developing soft drinks based on tea byproducts has been developed and disseminated to the Industry. Developed technology for preparation of green and black soluble tea (can be used as antioxidant, beverage and food additive). Developed technology for extraction of antioxidant and natural tea colour from tea.
  • Established state of the art laboratories for determination of residues TLabs at Kolkata.
  • Generated data on pesticide residues and heavy metals in tea and submitted to FSSAI and other agencies for setting standards in tea.
  • Study initiated on development of clone suitable for production of Purple tea and Green tea
  • Collaborative Studies with ETP-TRA-TGBL on climate change suitability scenarios completed for 4 districts of Assam that showed the need for climate change adaptation strategies for adoption.
  • Developed a machine for removing iron filing for use in tea factory online.
  • The technique for vegetative propagation of tea by internodal cuttings.
  • Released 30 TV (Tocklai Vegetative) clones, 14biclonal seed stocks and 151 region specific garden series clones.
  • Invention of following tea machineries:
        MacTear Rotorvane
  •     Borbora Continuous Leaf Conditioner
  •     Continuous Tray Drier
  •     Continuous Fermenting Machine
  •     Borua Continuous Roller
  •     Tea Breaker-cum-Stalk Separator
  •     Green Leaf Storage Device
  •     Continuous Withering Machine
  •     Electronic Monitoring and Control System for Withering
  • Introduction of extended pruning cycle in lieu of annual prune for higher productivity and better distribution of crop.
  • Optimization of plant population.
  • New techniques of bringing up young tea reducing the gestation period from planting to full bearing.
  • Land planning, drainage and balance manuring for higher productivity. Soil Amendment techniques.
  • Establishment of the necessity for a light even canopy of shade for tea plantations in the plains of N.E. India.
  • Introduction of safer pesticides for effective pest and weed control with emphasis on integrated pest management.
  • Introduction of bioagents – Trichoderma and Bacillus for control of certain tea diseases and their formulation for commercial application.
  • Generation of data on pesticide residues in tea from multilocational supervised field trials.
+ Recent Achievements
  • Established an NABL accredited, state-of-the-art analytical laboratory for pesticide residues at Kolkata.
  • Released two new clones TTRI (Tocklai Tea Research Institute) 1 and TTRI 2 in 2014 raising the total number of Tocklai Vegetative clones released so far to 33. TTRI 1 is developed from Betjan progeny with a yield potential of 4000 kg/ha. TTRI 2 is a quality clone suitable for orthodox tea.
  • Released bi-clonal seed stock TSS 1, a High yielding quality seed stock for plains in Sep 2015. It is a combination of TV13 X TV17 with a yield potential of 3500 KMTH.
  • A quality seed stock for Darjeeling hills due for release obtained from combination of AV2 X P312.
  • Released Langree 51 and 56 garden Series clones. These clones were selected from a cross between Assam and China seed population of Lengree tea estate in Karbi Anglong District of Assam. The Lengree 51 and 56 are relatively tolerant to drought and the yield and quality are at par with other good clones.
  • Release of the clone, TV 31. This clone was selected from the progeny of a cross between TV-1 and TV-18. The clone has both good yield and quality.
  • Development of simple technique for top replacement by Cleft Grafting for getting vigourous plants and with better yield and quality. The technology is released to the industry
  • Anadenanthera peregrine is a leguminous shade tree released to the Industry during 2007-08. The shade species retains leaf throughout the year and has been found to be popular among tea growers. A large no. of seedlings has been distributed to the tea planters of North East India.
  • Developed catchment-wise integrated drainage system through remote sensing and GIS towards solving waterlogging at micro-level. Five pilot areas watersheds were studied in Assam and west Bengal for the purpose. The findings of the project are being applied in solving drainage problems.
  • A mobile platform based wireless sensor network system has been developed to determine and map some of the soil properties in situ. The platform is already working in commercial gardens.
  • A new enriched vermicompost technology developed. The enrichment is done by different mined and natural sources so that it can be used in organic gardens also. The technology is already disseminated to gardens and has been widely adopted
  • New planting pit mixture develop with enriched vermicompost which replaced the old cattle manure and fertilizers. Its application @250-300 g/pit at the time of tea planting is viable alternative to conventional cattle manure + 30 g SSP + 30 g Rock phosphate and is highly cost effective.
  • Developed technology for producing vermiwash and using it as foliar application (5-10%), which has been found to be effective on the growth and productivity of young and unpruned mature tea. It is eco-friendly and is one of the best liquid organic manure for foliar application in tea.
  • Developed technology for reducing compaction under heavy soils. Application of semi decomposed vermicompost/vertical mulching in trenches in alternate rows during LP year is more effective than the present practice of forking and hoeing
  • A package of practices for organic tea productions was developed. The package was based on field experiments conducted under Assam conditions. A book was published on agro technology of organic tea and distributed to end users for effective implementation
  • Soils of South Bank was found to be associated with lower content of available (<30 ppm) sulphur. Therefore, a need based recommendations of sulphur was made. A manual was published on Sulphur recommendation and distributed to end users.
  • Developed technology for reduction of Inorganic fertilizer input (up to 20%) by addition of organic matter grown in situ.
  • VAM and AZOVAM (dual inoculation) Technology developed for tea nursery and young tea mainly for use in planting pit.
  • A technology has been developed on bio control of termite pests by using Metarhizium anisopliae, an entomopathogen, isolated from live wood eating termite population of Cachar district, Assam. Mass production technology of Metarhizium anisopliae has been standardized and process is on for dissemination of the technique.
  • Beauveria bassiana, an entomopathogenic fungus has been found to be infectious to tea mosquito bug. Laboratory and field trial carried out at Tocklai demonstrated its effectiveness against this pest. A formulation has been developed at Tocklai. The technology has been used by tea gardens of North East India.
  • Major initiative launched for the control of Looper pest (H. taleca) and successful control measures (including light traps) developed in trials on commercial gardens in both Assam and Dooars. The technology is now successfully used by various tea gardens
  • A microbial preparation PGPR (plant growth promoting rhyzo-bacteria) known to have plant growth promoting effect and can induce plant resistance to pest and disease has completed successful trial in 5 commercial gardens and is in the process of dissemination to tea gardens. Research on PGPR is continuing.
  • Initial studies on mining of native phosphates using phosphate solubilising microbes is completed and commercial trials are in progress.
  • Developed Neem Kernel Aqueous Extract (NKAE) technology for tea pests/diseases control and has been successfully tested in commercial gardens. The technology is disseminated to tea estates across Assam and Dooars
  • Established a Model Tea Factory (MTF) for optimization and control of tea processing and manufacturing processes. A process technology for improvement of brightness of liquor by controlled withering is developed. Categorization of clones based on withering and fermentation has been made and disseminated to the Industry.
  • A technology of jute-based alternative packing material has been developed and demonstrated to the Industry.
  • A Modified Rolling Table (MRT) has been developed to improve the performances of the orthodox table roller with higher out-put and lower power consumptions. Trials were conducted at Teesta valley T.E. and Sungma T.E. Darjeeling. It was observed that there is an average saving of rolling time alongwith gain in leaf grade and quality. A bulletin was published on modified rolling table for end users
  • Tea tablets have been developed by using tea extract, which is spray dried and the powder is formulated to produce tea tablet. A patent has been granted on this new invention.
  • A process for developing soft drinks based on tea byproducts has been developed and disseminated to the Industry. Developed technology for preparation of green and black soluble tea (can be used as antioxidant, beverage and food additive). Developed technology for extraction of antioxidant and natural tea colour from tea.
  • Established state of the art laboratories for determination of residues TLabs at Kolkata.
  • Generated data on pesticide residues and heavy metals in tea and submitted to FSSAI and other agencies for setting standards in tea.
  • Study initiated on development of clone suitable for production of Purple tea and Green tea
  • Collaborative Studies with ETP-TRA-TGBL on climate change suitability scenarios completed for 4 districts of Assam that showed the need for climate change adaptation strategies for adoption.
  • Developed a machine for removing iron filing for use in tea factory online.
+ Past Achievements
  • The technique for vegetative propagation of tea by internodal cuttings.
  • Released 30 TV (Tocklai Vegetative) clones, 14biclonal seed stocks and 151 region specific garden series clones.
  • Invention of following tea machineries:
        MacTear Rotorvane
  •     Borbora Continuous Leaf Conditioner
  •     Continuous Tray Drier
  •     Continuous Fermenting Machine
  •     Borua Continuous Roller
  •     Tea Breaker-cum-Stalk Separator
  •     Green Leaf Storage Device
  •     Continuous Withering Machine
  •     Electronic Monitoring and Control System for Withering
  • Introduction of extended pruning cycle in lieu of annual prune for higher productivity and better distribution of crop.
  • Optimization of plant population.
  • New techniques of bringing up young tea reducing the gestation period from planting to full bearing.
  • Land planning, drainage and balance manuring for higher productivity. Soil Amendment techniques.
  • Establishment of the necessity for a light even canopy of shade for tea plantations in the plains of N.E. India.
  • Introduction of safer pesticides for effective pest and weed control with emphasis on integrated pest management.
  • Introduction of bioagents – Trichoderma and Bacillus for control of certain tea diseases and their formulation for commercial application.
  • Generation of data on pesticide residues in tea from multilocational supervised field trials.