Kaliumbicarbonat als möglicher Schwefelersatz im geschützten Gemüsebau

Summary in the original language of the document

The effect of the potassium bicarbonate product «Armicarb» was tested against powdery
mildew on tomato, cucumber melon, rosemary, sage and corn salad. The
disease reducing effect of potassium bicarbonate was comparable to sulphur for most
of the tested crops. With protective applications the efficacy was higher than 90 %.
However in melon were powdery mildew was present before the first spraying, the
efficacy was only 74 %. Compared to plant oils or extracts (such as fennel oil, tea tree
oil and lecithin) potassium bicarbonate has shown the same or better efficacy. In our
experiments we found no phytotoxicity caused by the potassium bicarbonate product
Armicarb®.