Abstract: Using diatomaceous earth and yellow soil as pesticide carriers, 19 insecticides were used to control Lixus subtilis Boheman of Chenopodium quinoa in laboratory. The results showed that 40% chlorpyrifos EC and 40% phoxim EC showed the quick-acting property and sustained performance, and the control effects reached 100% after 7 days, which was recommended for production. Using diatomite as the carrier, the control effects of 5% acetamiprid EC, 3.2% beta-cypermethrin·emamectin benzoate ME, 5% emamectin benzoate SC and 20% dinotefuran soluble granule were significantly improved, and the control effects were 100.0%, 100.0%, 73.3% and 95.8%, respectively, after 7 days of administration, which could effectively control Lixus subtilis Boheman of Chenopodium quinoa, and it was recommended to use the mixed application of insecticide and diatomaceous earth in production.

Key words: Chenopodium quinoa, Lixus subtilis Boheman, insecticide, laboratory control, control effects