permaculture

[<permed@nor.com.au>]

Worm juice diluted reduces fungal disease, as does kelp extract. 
Chamomile tea is also effective for damping off of seedlings. 
For powdery mildew & black spot, 1 teaspoon epsolm salts in 10 liter (2 
gall) water but check magnesium levels in soil before use.
In the tropics, wet season rain & humidity is a real problem - a friend 
in Bali grows his seedlings and salad greens under plastic during the wet 
which has dramatically reduced damping off and fungal disease - the 
plastic is mounted on bamboo rectangular frames and fixed as a roof with 
open walls for ventilation. The plastic frames are removed for the dry 
season - some are replaced with frames fitted with shade cloth for sun 
sensitive and shade loving plants - this may be a better long term 
solution than spraying as the real problem is often too much water/rain 
compounded by high humidity.
Sorry I can't provide references - no time to look them up.
Robyn