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All India Co-ordinated Research Project on Oilseeds – Castor is functioning at Tapioca and Castor Research Station, Yethapur from April 1998 with the aim of promoting castor cultivation as pure crop and to carryout research work on castor.

Preliminary evaluation and identification of promising hybrid combinations.
184 new hybrids are developed and tested in the Preliminary Hybrids Trials.
Hybrid Developed
            Castor hybrid YRCH 1 was released from this station in 2009, which is high yielding and  suitable both for rainfed and irrigated areas.

  • Average yield 1861 kg/ha under rainfed ecosystem and oil content 49 per cent.
  • Early duration of 150-160 days (15 days earlier than TMVCH 1 and 30 days earlier than GCH 4).
  • Semi dwarf highly branching and high yielding.
  • Proportion of female flower on the spike is more than 95 per cent.
  • Resistant to lodging.
  • Non shattering type.
  • Fertilizer responsive.
  • Suitable for rainfed and areas of limited irrigation potential because of its short duration.
  • Less time lag between any two order of spike, hence more number of spike is produced in short period.
  • Compact plant type suitable for intercropping system also.
  • Because of its earliness, it escapes botrytis in early sown conditions during kharif in Tamil Nadu.  It recorded the score of 5 in the 0-9 scale with only 11 to 25 % of capsule affected under normal epiphytotic conditions.
  • Low leaf hopper (Hopper burn 11 – 25 per cent) and whitefly (1 in 0-5 scale) incidence.
  • Moderately tolerant to capsule borer with an incidence of less than 20 per cent during peak infestation level.
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In coordination with Cental Tuber Crops Research Institute, Trivandrum, Tapioca and  Castor Research Station is conducting field trials on tapioca in and around Salem District.

Field trials are undertaken in crop improvement, crop production and crop protection aspects.  
Crop Improvement
Germplasm collection, conservation, characterization, cataloguing of different types   / cultivars of genetic resources of root and tubers in their respective regions.
Seedling evaluation programme .
IET on Cassava mosaic resistant lines
URT on Cassava
URT on Cassava mosaic resistant lines
Crop Production
Integrated nutrient management in Cassava
Effect of pruning on tuber yield of Cassava
Standardization of fertigation through micro irrigation for Cassava
Low input technology for cassava production
Integrated weed management in cassava
Crop Protection
Survey and surveillance of pest and disease of tuber crops.
In cassava, 364 entries of available at Tapioca and Castor Research Station.

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Research on Tapioca and Castor crops are being carried out at Tapioca and Castor Research Station, Yethapur both under irrigated and rainfed situations under TCRS- main scheme.
Current activities

Research trials are conducted in the following aspects

  • Cropping systems in tapioca and castor
  • Maintaining Germplasms and created Castor database on TNAU Genomics portal
  •  Spacing and Weed Management in castor and tapioca
  • Survey and monitoring of tapioca and castor pests and diseases and developing IPM techniques
  • Integrated Nutrient Management studies in  tapioca and castor
  • Drip irrigation, farm machinery and processing technology for tapioca.
  • TNAU Genomics  Portal
  • TNAU Genomics  Portal

 Technologies released for Adoption

  1. Management of cassava tuber rot with soil drenching of copper oxy chloride (2g/lit) @ 3rd and 6thMAP :  Recommended for adoption and included in CPG in the year 2006.
  2. Management of Areca nut wilt disease with soil application of neem cake @ 2 kg/palm/year+ root feeding of Tridemorph (2%) 3 times @ quarterly intervals: Recommended for adoption and included in Crop Production Guide in 2006.
  3. Inter cropping of castor with black gram (1:2) in rainfed situation: Recommended for adoption and included in CPG in 2007.
  4. Management of castor defoliators and capsule borer with Profenophos 0.05%:

Recommended for adoption and included in CPG in 2007.

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Irrigated Agriculture Modernization and Water Bodies Restorationand Management (IAMWARM) is an integrated, multidisciplinary approach with the objective of improving water use efficiency and increasing, the agricultural productivity.
TN-IAMWARM Upper Vellar (Vasista) is functioning in Tapioca and Castor Research Station, Yethapur for the benefit of farmers of Vasista river basin in Salem District.
The Upper Vellar river basin is one of the major river sub basin in Tamil Nadu with drainage of 1722 this subbasin an area of 10,572 hectares area irrigated through 70 tanks and 79 Anicuts. The total length of the Vasitariver is 76.70km. The river VasistaNadhidrains out from the southern slopes of the    Kalrayan Hills on the Northern boundary of AtturTaluk of Salem District. It originates at an altitude of about 1266m above MSL. Major crops grown are Paddy, Sugarcane, Maize, Tapioca, Groundnut, Sorghum, Arecanut, Turmeric and Banana.

  • Working towards large scale adoption of specific technologies such as SRI in rice, Drip fertigation in sugarcane, coconut, tapioca etc., to increase productivity in crops.
  • Provide information on price forecasting and market intelligence to develop market access.
  • Popularization of labor saving implements & machineries in rice, coconut, groundnut, cotton and maize to reduce cost of production.
  • Testing and adoption of technologies developed on- station to farm contitions.

Following are the components of TN- IAMWARM scheme.

SRI (System of Rice Intensification) has been successfully introduced in the Upper Vellar sub-basin during 2007-08. Around 525 farmers have got benefited from the technology in an area of 720 hectares with in Upper velar Sub basin, which is popularly known for its higher rice Yield under SRI
In Upper vellar sub basin organic farming was implemented in 50 ha.

Under IAMWARM Scheme Co 3 variety groundnut seeds were given to the beneficiaries those who have coming under the members of the water user association.
The average yield was 1252.5 kg/ ha.  By the adoption of this technology groundnut yield showed an increase of 30 %   when compared to conventional method.
Precision farming in upper vellar basin was introduced in 2007-08 and area of 102.02ha. Precision farming in upper vellar sub basin is recommended for Banana, turmeric, coconut,  vegetables, tapioca, sugarcane& flower crops.
E- Velanmai Scheme:
About 278 farmers enrolled in TN-IAMWARM  E- Velanmai scheme. A total amount of  Rs. 27,800  has been collected as membership fee.  15 training programmes  have been conducted  for the beneficiaries. Total number of 77 advices were given to the beneficiries. Sixty two number of capacity building programmes were conducted under e –velanmai scheme on handling of ICT tools.

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