Re: [IBC] Lime Sulfur

Lime sulfur is a pretty safe and effective pesticide, if used properly.  However, it 
is a surface protectant, with no systemic action whatsoever.  Therefore, using it 
prophyllactically at the beginning of winter makes very little sense- it will be worn 
off by rain and wind long before any pest is active.  It makes more sense to spray 
trees in early spring, before hot weather, but when fungi and insects are beginning to 
stir.  And I wouldn't use it then unless I knew I was facing an inevitable foe: for 
instance, cedar apple rust on my rosaceous bonsai, which need protection in early 
spring, just as leaves are unfurling.  Lime sulfur is perfect for that.

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