bleach spray

[ChrisK]

It is easy to calculate to scale to any volume using the dilution equation: C1V1=C2V2

C1= Initial concentration
V1= Initial volume
C2= Final concentration
V2= Final volume


You want a 0.31% final concentration of Sodium Hypochlorite. You start with 6% Sodium Hypochlorite (or whatever your bottle says) in the bleach solution. You want to fill a 32 oz spray bottle which is the final volume.


Thus:
C1= 6%
V1= unknown
C2= 0.31%
V2= 32 oz


6% * V1 = 0.31% * 32 oz

Rearrange

V1 = (0.31% * 32 oz)/6%

V1 = 1.65 oz (1.65 oz = 3.3 tablespoons = ~9.5 teaspoons)

Put 1.65 oz of 6% bleach into your spray bottle and fill to 32 oz.

Originally Posted by raindrops27

Thanks B54! I was just thinking about your bleach solution when I noticed some type of disease today I will try it out tomorrow.. Since I've only seen a problem on one plant I was going to use a standard spray bottle how much bleach should I add to that?? TIA