The concentration varies based on your garden zone, temperature and sun intensity. To make a baking soda foliar spray you mix 1-2 tablespoons of baking soda to 1 gallon of water. Use which ever one you are most comfortable with.
You can find slightly varying baking soda spray recipes on the internet. It really needs to be reapplied after every heavy rain and about every week to be most effective. The baking soda is only effective while it is on the leaf. The baking soda spray, by changing the PH level of the tomato leaf, prevents and/or interrupts spore reproduction. This change in the PH level, reduction of acidity, is NOT what the Leaf Spot spores want to reproduce. How and Why Does Baking Soda Spray Wor k?īaking soda spray reduces the acidity level on the tomato leaf or raises the PH level on the leaf. I start spraying about now as part of my prevention plan. Remember this varies from gardening zone to gardening zone. That is, start spraying before the disease comes to your garden. The best way to stop Leaf Spot is through preventative spraying. This doesn't always prevent the disease from taking hold on your tomatoes (it might) but it does greatly slow the progression of the disease down. By treating the tomato leaves you make it more difficult for the spores to take hold and reproduce. The key to effectively managing this disease and other fungal diseases is to create an 'unhospitable' tomato leaf surface for the spores. Leaf Spot is a fungus that reproduces through spores. I have not had issue with it for several years.
#Baking soda for tomato blight how to
Three years ago it was really bad in my area and that is when I learned how to best manage it. Prolonged wet days and the right temperature brings Leaf Spot to my garden tomatoes. Leaf Spot comes to my area in the late April and through May when the temperatures get around 70 degrees and the rains come. There are two fungal diseases that attack my tomato plants and they are Leaf Spot and Early Blight Each garden zone has its own set of issues with plant diseases and each zone varies for when the diseases may arrive.
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