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Damping Off

Per Hartmann, Kester & Davies, Jr., Plant Propagation Principles And 
Practices, the mycelia from the fungi organisms that cause damping off may 
occur in the soil, in infected plant tissues, or on seeds.  Because the growth 
rate of some fungi is enhanced at the same temperature necessary to germinate 
warm-season plants (68 - 86 F) these plants are particularly suseptible to 
damping off. 

At the school where I study propagaton we use a soilless mix of 1/3 peat, 1/3 
perlite and 1/3 vermiculite.  I also use this same mixture at home and 
experience very little if any damping off.  The peat contains natural 
inhibitors to the fungi that cause damping off.  If you mix your own soilless 
mix you may also find that it is more economical.

Julie Van De Wyngaerde
Pleasant Hill, CA
JVandes@msn.com
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