Hot air treatment for control of bacterial wilt in ginger root
1998
Tsang, M.M.C. | Shintaku, M.
Pseudomonas solanacearum, the pathogen causing bacterial wilt in ginger root, was eliminated when exposed to heat for 30 min at 50 degrees C (122 degrees F) and 45 min at 49 degrees C (120 degrees F), respectively. Exposing ginger seedpieces to hot air at 75% RH until their center temperatures attained 49 degrees C (120 degrees F) for 30 and 60 min and 50 degrees C (122 degrees F) for 30 min, resulted in minimal injury to the hosts. More than 87% of the seedpieces germinated without adverse effect on growth. Rhizomes harvested from plants grown from seedpieces inoculated with P. solanacearum, and subsequently heat treated with hot air at the above time and temperatures, tested negative for P. solanacearum. Heat treatment with 75% RH heated air may prove to be a convenient method to disinfect ginger seedpieces of the bacterial wilt pathogen.
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