Pesticide usage pattern in tea ecosystem, their retrospects and alternative measures
- Journal of Environmental Biology 期刊
- In recent years there has been a greater dependence on the use of pesticides (7.35-16.75 kgha-1) with little importance laid on other safe control methods for the management of tea pests. Due to this practice, the tea pests showed a higher tolerance/ resistance status due to formation of greater amount of ectereses, gtutathione S-trensferece and acetylcholinesterase. Thus, over reliance on pesticides end up with pesticide residue in made tea ( DD T- 10, 4 - 47, 1%; endosulfen - 41,1 - 98, 0%; dicofol - 0.0 - 82.4%; ethion - 0.0 - 36, 2%; cypermethdn - 6. 0 - 45.1%). The growing concern about the pesticide residue in made tee, its toxicity hazards to consumers, the spiraling cost of pesticides and their application have necessitated a suitable planning which will ensure a safe, economic as welles effective pest management in tea. At present it is e global concem to minimize chemical residue in tea and European union end German law imposed stringent measures for the application of chemicals in tea end fixed MRL values at â‰¤0.1 mgkg-1 for the most commonly used pestfoides which will not he met out in the real practice and has been a major constraint to tea exporting countries like India. In orderto regulate the situation of the Indian market at global level, central insecticide board and prevention of food adulteration regulation committee have reviewed the MRL position for tea and has recommended 10 insecticides, 5 acatfoides, 9 herbicides and 5 fungicides for use in tea and issued the tee distribution and export control order 2005 which will help the country to limit the presence o f undesirable substances in tea.