Bladsvampevarsling/Leaf disease monitoring and warning system

Author:

Anne Lisbet Hansen

ID:

407-2016

Conclusion:

Varslingssystem for bladsvampe i sukkerroer er udført med ugentlige observationer i roemarker fordelt i dyrkningsområdet. Resultaterne danner grundlag for anbefaling til dyrkere og rådgivere om bekæmpelse. Dominerende svampe i 2016 har været meldug og rust. Varsling for første svampebehandling er foretaget i uge 29 (18.-24. juli), som følge af begyndende angreb af meldug og rust.

Conclusion:

Leaf disease monitoring has been conducted on 11 sites through out the main growing area. Incidence and development of rust, powdery mildew, Ramularia and Cercospora have weekly been assessed and recorded for selected varieties. The results are used for recommendations to growers and will serve as documentation for the development of fungal sugar beet disease. Dominating leaf diseases have in 2016 been powdery mildew and rust. First warning for possible need of first application, if symptoms could be observed, has been sent out in week 29 (July 18-24).