Sammendrag

Chocolate spot (CS) is one of the most destructive diseases affecting faba beans worldwide, leading to yield reductions of up to 90% in susceptible cultivars under conducive environmental conditions. Traditionally, the disease has been attributed to the fungal pathogens Botrytis fabae and Botrytis cinerea, however recent studies have identified three additional Botrytis species capable of causing the disease. Fungicide applications during flowering are commonly used to control the disease and limit damage to pod set, but this approach is not always effective. The reasons for this lack of control are not fully understood. To increase our understanding of the CS species complex in Norway, we used species-specific PCR to identify different Botrytis species in symptomatic leaves collected at various locations and years. Some Botrytis species are known to be high-risk pathogens for fungicide resistance development, but resistance in Norwegian Botrytis populations in faba bean have not previously been studied. Therefore, we obtained Botrytis isolates from diseased leaves and used a mycelial growth assay to assess their response to the active ingredients (boscalid and pyraclostrobin) in the fungicide commonly used for CS control in Norway. Resistance to both boscalid and pyraclostrobin was detected among B. cinerea isolates, while only resistance to boscalid was detected among B. fabae isolates. To elucidate resistance mechanisms, we analyzed target gene sequences for the presence of mutations known to confer resistance to the two active ingredients. Field experiments were conducted to test the efficacy of various spray timings and fungicides in early and late faba bean varieties. Additionally, we are developing a disease risk model for CS to better understand the conditions that lead to disease and to improve the timing of fungicide applications.

Onion with pest

Divisjon for bioteknologi og plantehelse

Strategies and methods to manage major pests and diseases of onion (‘QualityOnion’)


Onion fly and Fusarium basal rot represent major threats for sustainable Norwegian onion production. There are substantial gaps in our knowledge regarding these pests such as which Fusarium species infect onions in Norway, what are the main sources of Fusarium inoculum, and how onion fly prevalence is changing through the growing season.

Aktiv Sist oppdatert: 04.07.2024
Slutt: nov 2027
Start: jan 2024
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Divisjon for bioteknologi og plantehelse

Green crop protection: Cruciferous plants as a green alternative to chemical pesticides in cereals


Cereal plants infested with plant pathogenic fungi or nematodes may have reduced grain quality and yield. These diseases can partly be controlled by using chemical pesticides. The purpose of this project is to identify "green" methods to mitigate plant pathogenic fungi and nematodes in cereals, as an alternative to chemical pesticides.

Aktiv Sist oppdatert: 08.05.2024
Slutt: des 2025
Start: jan 2023
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Divisjon for bioteknologi og plantehelse

Grønt plantevern: Korsblomstra vekster som et grønt alternativ til kjemiske plantevernmidler i korn


Angrep av plantepatogene sopp og nematoder kan redusere avling og kvalitet av norskdyrket korn. Disse skadegjørerne kan til dels bekjempes ved bruk av kjemiske plantevernmidler. Formålet med dette prosjektet er å identifisere «grønne» metoder for å bekjempe plantepatogene sopper og nematoder i korn, som et alternativ til kjemiske plantevernmidler.

Aktiv Sist oppdatert: 19.06.2024
Slutt: des 2025
Start: jan 2023