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Research Detail

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Dr. Mainuddin Ahmed
Chief Scientific Officer
Department of Pest Management, BTRI, Srimangal, Moulvibazar

Mohammad Shameem Al Mamun
Scientific Officer
Entomology Division, BTRI, Srimangal, Moulvibazar

Shovon Kumar paul
Scientific Officer
Entomology Division, BTRI, Srimangal, Moulvibazar

Mihir Lal Sarker
Scientific Instrument Specialist
BTRI, Srimangal, Moulvibazar

The residue levels of Cypermethrin, Ethion, Fenvalerate, Propargite, Dimethion and Bifenthrin on the 7th day were 0.85 & 2.58; 4.66 & 7.38; 2.50 & 5.60; 3.52 & 5.68; ND & 0.56 and 0.043 & 0.078 mg/kg in normal and double dose respectively. None of the analyzed samples of Pre Harvest Interval (PHI) at 7 days of normal dose exceeded the MRLs imposed by EPA, Codex Commission, EEC/EU and German law except Ethion.

  Tea, Pesticide Residue, Safe Harvest Interval, Plucking
  BTRI Main Farm, Pesticide Residue Analytical Laboratory
  01-01-2007
  31-12-2010
  Pest Management
  Impact
  1. To determine the residue level of commonly used pesticide in tea at different intervals after spraying
  2. To determine the safe harvest interval after spraying of pesticides

The green leaves were manufactured in the Mini Tea Factory and the residue level was determined in the Pesticide Residue Analytical Laboratory of the Institute. Processed black tea samples were grinded by a coffee grinder and hydrated. Subsequent extraction and clean up were carried out. The residue analysis was done according to the methods developed by Ahmed & Sarker (2002) at Central Science Laboratory (CSL) in U.K. (Method reference PGD-95/01-07). The determination was done by Electron Captured Detector (ECD) and Flame Thermoionic Detector (FTD) using Shimadzu Gas Chromatograph 14-B with DB-5 Capillary Column. Nitrogen gas will be used as carrier gas. Hexane and Acetone were used as extracting reagents and Florisil as Clean-up reagent.

  Annual Report 2010
  
Funding Source:
1.   Budget:  
  

The residue levels of Cypermethrin, Ethion, Fenvalerate, Propargite, Dimethion and Bifenthrin on the 7th day were 0.85 & 2.58; 4.66 & 7.38; 2.50 & 5.60; 3.52 & 5.68; ND & 0.56 and 0.043 & 0.078 mg/kg in normal and double dose respectively. None of the analyzed samples of Pre Harvest Interval (PHI) at 7 days of normal dose exceeded the MRLs imposed by EPA, Codex Commission, EEC/EU and German law except Ethion.

  Report/Proceedings, Booklet/Leaflet
  

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