As a drink, tea enjoys a good popularity all around the world for its rich in caffeine, proteins, amino acids, vitamins and so on. And it is well known that tea leaves are processed directly after picked up without any clean and disinfecting procedures. So pesticide residue on tea became a focus which has been drawn much attention to in recent years.
Chongqing is one of the important tea bases of China for the climate there is good for tea plant growing. However, tea disease and insect happenes f...