Abstract: Clorox, carrot roots and Eucalyptus leaves and fruits water extracts were tested against S. cepivorum growth inhibition on Potato Dextrose Agar (PDA) growth medium. In vitro study indicated that Clorox completely inhibited the linear growth of the pathogen, even in a concentration of 1 ppm. Carrot extract inhibited the pathogen growth with inhibition percentage reached from 11 to 20% and from 3 to 8% after 7 and 10 days, respectively (75% w/v). Eucalyptus leaves and fruits water extract gave the greatest reduction in the linear growth of the fungus have scored a linear growth value of 2.4±0.5 and 2.3±0.3 cm, respectively compared to the control which gave 8.3±0.28 cm after seven days of inoculation. Furthermore, the field experiments indicated complete inhibition for onion white rot infection with S. cepivorium by using either Clorox or sulfur powder and/or Calcium oxide (lime stone).