Breeding of Trichogramma chilonis with tussor eggs for factitious host eggs,effect of different inoculation hours on its propagation was studied.The results indicated that inoculation hours had significant effect on breeding of Trichogramma chilonis.It should be controlled among 36h-48h and the best was 48h in mass production,because of which both percentage of eclosion and number of effective wasps per factitious host egg were highest.