Found that the death of worms has increased the concentration of zinc oxide increases. The concentration of ZnO, the worms die percentage 50 (LC50) at 48, 72 and 96 hours was 21.00, 10.17 and 5.90 mg / L, respectively, and at times, the worms die percentage of 50 (LT50. ) The concentration of zinc oxide, 4.795, 5.845, 6.875, 8.755, 11.565 and 14.765 mg / liter is equal 103.01,96.12, 83.02, 79.30, 73.03 and 62.31 hours, respectively, the LT50 has decreased concentrations of zinc. oxide increases the mortality of adult Rice weevil. The increased concentration of cypermethrine increase. The concentration of cypermethrine The rice weevil was 50 percent. A ppm LC50 values and the rice weevil larvae per cent 50 (LT50) is equal to a minute, the LT50 has decreased with increasing concentrations of cypermethrin.
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