Step 1: Fill Spray applicator with 20% concentration vinegar. We
used 1/2 a litre on 10 square meters in a first trial and then 1 litre
in a second.
Step 2: Apply to weeds
Step 3: Observe almost immediate effect of the pesticide.
Caution:
This is very acidic and must be handled with care. The effect lasts
about one week in average and 3 in strong rain. I conclude it will last
longer than 1 week if there is no to little rain. Vinegar essence is
effective from 5% to 20%, and 20%, depending on the type of weeds.
Large leaf weeds, so we observered, have less resistance. After that
time, no negative impact on the soil was recognised, so it is ideal for
later cultivation.