A, a non-treated adult and eggs of two spotted spider mite, T. urticae Koch (control); B, the cuticle damage of the treated T. urticae with 3000 ppm of Huwa-San TR50; C, treated and non-affected predatory mite, N. cucumeris Oudemans with 3000 ppm of Huwa-San TR50; D, non-hatching of eggs of T. urticae as compared with non-treated T. urticae (control).