Quote:
Originally Posted by clspie
I use h2o2 for my seedlings always, to prevent damp off. A very weak solution. One and one half teaspoons of 3% h2o2 for one cup of water. 50% is way too much.
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I am glad you posted the exact measurement you use because it confirms the research report from the high school student with real life application almost exactly.His measurements were :
A. One cup of water. Label this bowl as None.
B. One cup of water and one teaspoon of hydrogen peroxide. Label this bowl as Low.
C. One cup of water and three teaspoons of hydrogen peroxide. Label this bowl as Medium.
D. One cup of water and five teaspoons of hydrogen peroxide. Label this bowl as high
Results
The hydrogen peroxide had a positive effect on the plants. The ones with a low concentration of hydrogen
peroxide grew the fastest, then the medium, then the high, and lastly came the ones with only water in
their cup (dependant variable). Since the hydrogen peroxide contains oxygen, the plant roots grew faster.
The roots need oxygen, and it was always readily available in this way. As the concentration of it got
higher, the acidity of the hydrogen peroxide began to affect the seeds and made them grow slower.
https://csef.usc.edu/History/2013/Projects/J1717.pdf
Also fish emulsion has been proven to control damping off
https://garden.org/learn/articles/view/2267/
http://tomatoville.com/showthread.php?t=44486