Effect of electron beam irradiation to pest according to packaging box position for exported cut flower

The effect of the electron beam irradiation (200 and 300 Gy) in accordance with packaging box position for exported cut flower (rose and chrysanthemum) was determined with 6 species pest (Liriomyza trifolii, Spodoptera litura, Myzus persicae, Tetranychus urticae, Bemisia tabaci and Frankliniella intonsa). At 200 Gy, eggs of T. urticae, B. tabaci and F. intonsa were completely inhibited in all position of flower box, but some eggs of L.trifolii and S. litura were hatched in bottom site of flower box. Pupation and emergence of larvae of L. trifolii and S. litura and nymphs of B. tabaci was completely inhibited in all position of flower box. But, nymphs of T. urticae and M. persicae were not inhibited in all position of flower box. When pupae were irradiated, pupae of L. trifolii were completely inhibited in all position of flower box. But, pupae of S. litura were not inhibited in top position of flower box. In irradiated adults, F₁ generations hatchability of T. urticae were completely inhibited in middle position of flower box (rose), however, were not completely inhibited in all position of flower box (chrysanthemum). Several developmental stage of pest was not completely inhibited within 200 Gy. However, all stage of pest was completely inhibited in 300 Gy. These results suggest that the sterilization doses of electron beam irradiation dependent on the species of pest and flower.