- 4 - 



Sodium hypochlorite solution is 

 mold spores which are wet with it 

 several days - until the solution 

 rine dissipates into the air. It 

 apples which come in contact with 

 In blue mold control experiments 



Experiment Station, 

 rine solution (4000 

 registered by the Environmental 

 ping apples.) 



extremely toxic to blue 



Action continues for 

 dries out and the chlo- 

 leaves no residue to harm 

 treated surfaces later, 

 at the Washington State 

 apples dipped in a 0.4% available chlo- 

 ppm) were not harmed. (But, it is not 



Protection Agency for dip- 



Apply to precleaned surfaces because it does not pene- 

 trate encrusted organic matter such as rotted apple tis- 

 sue very wel 1 . 



Sodium hypochlorite is registered for use by the Environmental 

 Protection Agency as follows: 



Lugs : (this would include apple boxes) "Dip empty boxes in 

 1600 ppm or stronger available chlorine. Do not rinse." 



Storage Cellars : "For floors, ceilings, and walls, spray with 

 200 to 5000 ppm available chlorine solutions. Do not 

 rinse." (Although 2000 ppm kills blue mold spores, 4000 

 ppm gives a little more "oomph" and is what the Washington 

 Experiment Station suggests.) 



Storage Rooms (ceilings, floors, shelves and walls): "Use 

 1000 to 1900 ppm available chlorine. Apply with a mop, 

 sponge, or sprayer to precleaned surfaces. Do not rinse." 



Here is how much household bleach solution containing 5.25% 

 sodium hypochlorite to mix with water to get the ppm (parts per 

 million available chlorine) you want. 



1000 ppm-2 1/2 oz solution from jug to 1 gal water. 



Want more? 1 gallon to 50 gals water. 



2000 ppm - 5 oz per gal or 1 gal to about 25 of water. 



(c) Formal dehyde - Commercially available as formalin which 

 is about 37% formaldehyde dissolved in water with a little 

 methyl alcohol added as a stabilizer. 



