NDVI-baseret variabel fungicidtildeling ved bladsvampebekæmpelse

Forfatter:

Anne Lisbet Hansen, NBR

ID:

408-2025, Anne Lisbet Hansen, NBR

Konklusion:

Indledende forsøg 2019-2022, hvor udvikling af bladsvampe blev undersøgt i forsøg med kunstigt etablerede biomasseforskelle, viste at især udvikling af rust påvirkes af roeplanternes biomasse/NDVI. I tre stribeforsøg 2023-2024 er effekt af at graduere fungicidtildeling baseret på NDVI sammenlignet med ensartet tildeling. Der er i forsøgene målt samme udbytte ved de to typer af tildeling og dermed er der ikke opnået udbyttegevinst ved at graduere. Dybere analyse af bladsvampeudviklingen i forsøgsmarkerne i 2024 indikerer at omfordelingen har en effekt på angreb af Cercospora. Flere undersøgelser på området er påkrævet.

Conclusion:

Preliminary trials with sugar beet conducted from 2019 to 2022, in which the development of leaf diseases was investigated in experiments with artificially established differences in biomass, showed that especially the development of beet rust is influenced by sugar beet biomass/NDVI. In three strip trials carried out in 2023–2024, the effect of variable fungicide rate application based on NDVI was compared with a uniform application. The trials showed the similar obtained sugar yield for the two application strategies, and therefore no yield benefit was achieved by variable dosage. A deeper analysis of leaf disease development in the trial fields in 2024 indicates that redistribution influences Cercospora leaf spot infection. Further studies in this area are required.

Publikationsdato:

21/04/2026