Monthly circular – April 2014
Monthly Circular April -2014
Weather data recorded in March 2014 at the TRF observatory are given below, along with the
corresponding figures for March 2013.
|Year||Total Rainfall mm||Mean Sunshine hr/day||Mean Temperature ° C||Mean
Relative Humidity % at
|Mean Evaporation mm/day||Mean Wind speed km/hr|
Nursery: Planting of cuttings in nursery may be started during this month.
Plucking: Addition of mother leaf by hand plucking is to be discontinued after the receipt of sufficient (2 to 3 inches over a period of seven to ten days) pre monsoon showers. Late second, third and fourth year fields may be brought under shear harvesting during the month.
Pruning: Pruning may be started during this month after the receipt of sufficient rainfall. The entire pruning operation can be completed within 20 days if pruning machines are used.
Liming: Based on soil pH, rainfall, yield level and length of pruning cycle, dolomitic lime may be applied to the fields earmarked for pruning. There should be a minimum of 6 weeks interval and 15 cm rainfall between liming and NK application and vice versa.
Fertilizer application: One split of sulphate of ammonia based NK mixture may be broadcasted immediately after receiving sufficient rainfall. In the pruned year, N:K2O ratio may be maintained as per pruning height whereas 2:1 ratio may be followed in other years of the pruning cycle. If sulphate of ammonia is not available, urea may be applied at 4:3 – N: K2O ratio. Adequate soil moisture is to be ensured for urea application.
Soil application of phosphorus: For low and medium yielding fields, 300 g of citric acid may be mixed with 15kg of P2O5 per ha (83 kg of rock phosphate) and for high yielding fields 500 g of citric acid may be mixed with 20 kg of P2O5 (110 kg of rock phosphate) and applied along with the first split NK by broadcasting. To ensure proper mixing, five kg of rock phosphate may be first mixed with 300 g of citric acid, and this mixture may be thoroughly mixed with the entire quantity of rock phosphate and then with the entire quantity of NK before broadcasting.
Foliar application of zinc, magnesium, manganese, boron and NAA: One round of foliar application of two kg each of zinc sulphate and magnesium sulphate (1% concentration) along with 308 g of manganese sulphate, 114 g of boric acid and 45 ml of Planofix/Agronaa in 200 litres of water per hectare may be given after receiving sufficient rainfall.
Foliar application of PGRs: One round of foliar application of Biozyme/Cytozyme @ 200 ml in 200 litres of water during the third or fourth week of April could be beneficial. Straight application is suggested. Alternatively, Kadostim @ 300 ml in 200 litres of water per ha is recommended. It is compatible with micronutrients.
Pest control: Mild to moderate infestation of red spider mites has been observed in the district. RSM infested fields may be sprayed with any one of the following recommended chemicals. 1. Propargite 57 EC @ 500 ml/ha 2. Fenpyroximate 5 EC/SC @ 300 ml/ha, 3. Hexythiazox 5.45 EC @ 400ml/ha. 4. Spiromesifen 240 SC @ 300 ml/ha 5. Lime sulphur – Polysulphide-S content 13-15 % @ 1:40, 10-12 % @ 1:30; 7- 9 % @ 1:25 and < 7 % @ 1:20 6. Paraffinic Oil @1500 ml/ha
Mild infestation of Tea mosquito and moderate incidence of thrips has also been noticed in many estates. To contain these pests, immediate spraying should be done after plucking with any one of the following insecticides like Thiamethoxam 25 WDG @100g/ha, or Quinalphos 25 EC @ 1000ml/ha. Spraying of synthetic pyrethroids should be avoided during this month.
Shot hole borer infested fields, which are due for pruning in April 2014, may be sprayed with any one of the following insecticides immediately after pruning to prevent the migration of the beetles to adjacent fields. 1. Deltamethrin 2.8 EC @ 500 ml/ha. 2. Quinalphos 25 EC @ 1000 ml/ha. A spray volume of 675 litres of water per hectare is recommended, if hand operated knapsack sprayers are used. The volume of spray fluid could be reduced to 400 litres per hectare, if power sprayers are used. The branches which are very badly affected by shot hole borer may be cut to sound wood by selective surgery by well trained workers.
Mid-cycle chemical spraying against shot hole borer has to be carried out during the month of April in third year fields having more than 15% infestation. Any one of the above mentioned insecticides may be sprayed.
Weed control: Wherever growth of weeds is noticed spot spraying of ammonium salt of glyphosate (Excel Mera 71 SG) @ 3g/L of water is recommended.
News & Events5
Dr. C.S. Venkata Ram Memorial Annual Tea Colloquium will be held on Aug, 2018 at Seminar Hall, UPASI Tea Research Foundation, Tea Research Institute, Valparai. The maximum time for presentation is ten minutes followed by discussion. Prizes will be awarded for the best three presentations.…Read More
The Pesticide Residue Division is equipped with state-of-art instruments viz., Gas Chromatograph, High Performance Liquid Chromatograph, GCMS, Atomic Absorption Spectrophotometer, etc., Our lab is GLP certified by National GLP Compliance Monitoring Authority, Govt. of India for the execution of Pesticide Residue Studies. We are accredited…Read More
08/09/2018 @ 09:30 am
Date of Publish: 09-Sep-2018 UPASI TEA RESEARCH FOUNDATION TEA RESEARCH INSTITUTE NIRAR DAM PO VALPARAI – 642 127 Applications are invited from the eligible Indian candidates for the following recruitments 1. ASSISTANT BOTANIST M.Sc., (Botany) with 3 years of research experience in the relevant field…Read More
Monthly Circular April -2014 WEATHER Weather data recorded in March 2014 at the TRF observatory are given below, along with the corresponding figures for March 2013. Year Total Rainfall mm Mean Sunshine hr/day Mean Temperature ° C Mean Relative Humidity % at Mean Evaporation…Read More
11 July 2018 Condemned Instruments/Equipments at UPASI TEA RESEARCH FOUNDATION, Nirar Dam BO, Valparai -642127, Coimbatore Dist. are for disposal (For details, see www.upasitearesearch.org). Sealed quotations for the above may be sent to the Director, UPASI Tea Research Foundation, Tea Research Institute, Nirar Dam BO,…Read More
Ajaikumar, S., Siby Mathew, R. Raj Kumar and P. Mohan Kumar (2014). Mechanical harvesting in tea: A case study of Pasuparai estate. Journal of Plantation Crops. 42(2): 201-214. Ajay, D. and Baby, U.I. 2010. Induction of systemic resistance to Exobasidium vexans in tea through SAR…Read More
The principal landmark in the history of tea research in south India, was the establishment of a Tea Experimental Station in Gudalur in 1926. During the last seven and half decades, this research organisation. Now known as the UPASI Tea Research Foundation (UPASI TRF), had…Read More
Annual Report is the one among the major publications of UPASI TRF. Annual report of each year is released by September of the following year. Other publications include Research Highlights and half yearly Newsletters. The Bulletin of UPASI TRF is an occasional publication. The Handbook…Read More
DATE: 10-12 December 2014
PLACE: KozhikodeRead More
Research Extension Meeting
DATE: 06-08 May 2013
PLACE: ValparaiRead More
JOINT AREA SCIENTIFIC SYMPOSIA (JASS)
INTERNATIONAL TEA CONVENTION
Dr.C.S. Venkata Ram Annual Tea Colloquium
DATE: 1 August 2013
PLACE: VALPARAIRead More
INTERACTIVE SESSIONS / WORKSHOPS
PLACE: VALPARAIRead More
PLATINUM JUBILEE SYMPOSIUM
PLACE: ChennaiRead More
PLANTATION CROPS SYMPOSIUM 2014
UPASI ANNUAL CONFERENCE
DATE: September 2013
PLACE: CoonoorRead More
Of late, considering the constant usage of pesticides and to monitor the residues in the final produce, a well equipped test facility was established at UPASI TRI in 1994. The pesticide residue laboratory is accredited by National Accreditation Board for testing and calibration Laboratories (NABL)…Read More
The Tea Research Institute at Valparai has seven divisions namely Botany, Soil Chemistry, Entomology, Pesticide Residue, Plant Pathology & Microbiology, Plant Physiology & Biotechnology and Tea Technology. Botany Research activities of Botany Division include plant improvement, cultivation practices and weed research. Plant improvement programme was…Read More
Chemistry Division is involved in research pertaining to soil-plant nutrients of tea besides extending analytical service to the industry. The research activities include investigations on physico-chemical properties of soil, soil-plant interactions, response of tea to major, secondary and micronutrients and their interactions. The research work…Read More
Entomology Division involve in basic and applied aspects of insect pests, particularly, biology, ecology and evolving control measures. The division evolved and recommended physical, chemical and biological method of tea pests control. In the past, extensive studies on bioecology, crop loss due to major pests…Read More
Pathology & Microbiology
In the division of Plant Pathology & Microbiology, research is carried out on diseases of tea and biofertilizers. Among the tea diseases, blister blight is the most important leaf disease caused by the pathogen, Exobasidium vexans affecting the tender harvestable shoots of tea resulting in…Read More
Physiology & Biotechnology
Plant Physiology Division was established in 1980 which has been primarily concentrated on crop productivity. The division strives for excellence in applied research in tea productivity and bush health besides biotechnological studies. The research undertaken extends over a wide range of research programmes having collaborative…Read More
Besides offering the analytical services and involving in inter laboratory ring test to validate the test methods, Tea Technology Division is concerned about quality of final produce in accordance with PFA Act requirements, storage studies, value added products and manufacturing aspects. The laboratory has been…Read More