Here is Jerry Baker's free recipe for fending off disease in your
tomatoes:

3 cups of compost
1/2 cup of Epsom salts
1 tbsp. of baking soda
1/2 cup of powdered milk

Combine the first three ingredients in a bucket, and add a handful of
the mix to the planting hole. If you like sweet tomatoes add a spoonful
of sugar to each hole as well.

After planting sprinkle a bit of the dry milk on the soil. Repeat every
few weeks for the most terrific tomatoes in town, says Jerry!

He also uses powdered milk with old seed for some reason. I haven't
bought his book, only looking at the promo.

http://www.jerrybaker.com

Best to All -- Gae