How to prevent onion and garlic crop from white rot disease

White rot: in onion and garlic, white rot disease is caused by a fungus called Sclerosium sepi veeram or Sclerosium rolf sai.
Symptoms of this disease: The upper part of onion / garlic rotten near the soil and the white mold forms on the infected part and above the ground, a hard dotted structure is formed like light brown mustard seeds, which are called sclerosia. The infected plants then proceed to wither and then dry up.
Chemical treatment: for prevention of these disease use Carbendazim 12% + Mancozeb 63% @ 300 gram/acre or Kasugamycin 5% + Copper Oxychloride 45% WP @ 300 gram/acre or Chlorothalonil 75% WP @ 250 gram/acre or Thiophanate Methyl 70% WP @ 300 gram/acre
Biological treatment: use Pseudomonas Fluorescens@ 250gram/acre or Trichoderma Viride@ 500 gram/acre