Persistence of thiacloprid and deltamethrin residues in tea grown at different locations of North-East India.
Food Chem
; 253: 88-92, 2018 Jul 01.
Article
en En
| MEDLINE
| ID: mdl-29502848
ABSTRACT
In order to examine the residues of thiacloprid (90 and 180â¯gâ¯a.i./ha) and deltamethrin (10 and 20â¯gâ¯a.i./ha) in fresh tea leaves, made tea and tea infusion, field experiments were conducted at three different locations viz. Kamalpur tea estate, Darjeeling; West Bengal, Teok tea Estate and AAU, Jorhat; Assam in India. Regardless of location and doses, residues of both the insecticides dissipated following first order kinetics. The half-life of Thiacloprid (4.93-5.38â¯days) was longer than that of deltamethrin (1.78-1.94â¯days). Processing of green tea leaves reduced the residue level of thiacloprid and deltamethrin in made tea. No residues of both these insecticides could be detected in tea infusion. With respect to the phenolic distribution in tea, a marked increase in total catechin monomers with thiacloprid and greater accumulation of EGCG and ECG (indices of phenol quality) with deltamethrin were observed.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Piretrinas
/
Té
/
Tiazinas
/
Residuos de Plaguicidas
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Neonicotinoides
/
Insecticidas
/
Nitrilos
País/Región como asunto:
Asia
Idioma:
En
Revista:
Food Chem
Año:
2018
Tipo del documento:
Article
País de afiliación:
India