Abstract: In recent years, the tea lace bugs have broken out in some tea areas of China, and there is an urgent need for an efficient and safe control technology. In this paper, the safe and efficient control technology against tea lace bug was studied from aspects of application methods, types of pesticides, applied dosage and pesticide residues. The control efficiency of knapsack mist sprayer was significantly higher than that of knapsack electric sprayer, and the control efficiency was significantly increased with the increase of water consumption. Among the 8 single-dose chemical pesticides, bifenthrin, beta-cypermethrin and fenpropathrin showed good control effects on tea lace bugs with the control effects higher than 90% 7 d after application. Their dosages of active ingredients were 1.31 g·hm^-2, 22.50 g·hm^-2 and 11.25 g·hm^-2, respectively. Moreover, the pesticide residues in tea were all lower than the maximum residue limit standards from China and the European Union. The control effect of tolfenpyrad could be up to 70% 7 d after application. But the control effects of chlorfenapyr, spinetoram, indoxacarb, and buprofezin were not satisfactory. The control effect of beta-cypermethrin·pyriproxyfen was the best among the 3 compound chemical pesticides, and could reach to 89% 7 d after application. Among the 3 group botanical pesticides, the control effect of pyrethrum was the best, which could be up to 90% 7 d after application when the active ingredient was 45.00 g·hm^-2. The mixture of azadirachtin and veratrine and the mixture of azadirachtin and matrine did not show good control effects. These results indicate that the application of pyrethroids and pyrethrum through knapsack mist sprayer was an effective and safe control technology against the tea lace bugs.

Key words: tea lace bug, pesticides, pesticide application technology