Vapam Damage

[Stradiot Peter]

Vapam, will stay under normal temperatures (< 30°C) some days actif in 
the irrigation system or a spraying unit.
Abundant cleaning with water is the only solution.
All plants are sensitive to Vapam.

In order to control if there is still plant-toxic Vapam or other 
toxic liquids, put some irrigation water on cotonwool and seed with 
cress, after 3 days it will germ. If it germs and develops well, 
everything is OK.

Did you check the pH of your irrigation water?

Good Luck

Peter Stradiot