Efficacies of Five Pesticides on Controlling Eotetranychus kankitus Ehara at Tea Plantation

Objective Efficacies of 5 pesticides to control the recently found pest, Eotetranychus kankitus Ehara, that caused severe damage to tea plantations in China, were evaluated.

Method An experimentation was conducted in the field with the selected pesticides sprayed on the tea bushes infested by the spider mites to determine the control efficacies of the agents.

Result All 5 tested insecticides, i.e., pyrethrins 1.5% EW 500x solution, chlorfenapyr 8% ME 750x solution, indoxacarb 15% EC 2500x solution, biprocyclodee 5% DC 1800x solution, and emamectin benzoate · tolfenpyrad 11.8% SC 1500, could effectively deter damage on tea bushes by E. kankitus. The corrected control efficacies of these pesticides on the spider mites in 3d after treatment were 96.25%, 90.79%, 93.97%, 81.82%, and 78.73%, respectively; while in 7d after treatment, the efficacies were 83.43%, 67.17%, 79.15%, 81.49%, and 73.06%, respectively.

Conclusion All 5 applied pesticides effectively put the E. kankitus infestation under control in the field. Pyrethrins 1.5% EW 500x solution appeared to be the most effective agent among them.