Differences between Metiram, Zineb and Mancozeb
** The Smell**
Metiram - rotten egg smell
Zineb - sulfur smell
Mancozeb- fish smell
** The Molecular structure **
** Zinc content**
Metiram - 18%
Zineb - 8%
Metiram :Higher zinc content, better protection,can make leaf green. Improve crop yield and improve quality; better control of melon downy mildew comparing with mancozeb, less harm to then predatory mites.
Zineb:Zineb is like mancozeb without Manganese,the only selling points higher Zinc conetent comparing with Mancozeb.
Mancozeb:Manganese ions can be easily decomposed from Mancozeb (non-complex), sometims will lead injury to the crop.
The duration is different:
Metiram : long duration, safe, even use when flowering.
Zineb is sterilization and zinc, sterilization and zinc are quick, the effect is shorter, usually 5 to 7 days.
Mancozeb Zinc in the mancozeb can control the release rate of manganese, so it will have more lasting efficacy, the general efficacy of 10 to 15 days, longer than Zineb.