Content

Bladsvampebekæmpelse i økologi

411-2021, Anne Lisbet Hansen, NBR

Conclusion

In two organic grown sugar beet trials, three products, Kumulus S, Natron (soda, sodium bicarbonate) and Serenade ASO, are tested for their effect on leaf diseases as possible solutions for organic sugar beet cultivation.
Kumulus S shows an effect against powdery mildew, but Natron and Serenade ASO do not show effect against mildew. No effect on rust is observed with the tested products. There is a tendency for 1-3 pct. yield increase after treatment with Kumulus S, but no positive net income is obtained. On average of 6 trials over 3 years, Kumulus S with four treatments at 3.5 kg per ha shows a small net profit, but the dosage is not approved for ecology.