In addition, there is a problem on the storage
environment and duration of garlic bulb crude extract. As the
instability of the disulfide bonds in allicin, which is an
effective antifungal ingredient in garlic, at high temperature
and alkaline conditions, allicin would be hydrolyzed and loss
its control effect. Therefore, garlic bulb crude extracts should
be saved in acidic and low-temperature environment (pH: 5.0
and 4oC). Allinase in garlic will lose activity at 3oC for 14
days, thus affecting the synthesis of alliin and reducing
inhibitive effect. So garlic bulb crude extracts should be used
as soon as possible after preparation (Song, 2004).