Late blight

Contributor: Aarhus Universitet
Date Compiled: 2025
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Image copyright: Public Domain - Released by Scot Nelson/via Flickr (CC0 1.0)

Prevention

Solution Production stage (if possible with reference to BBCH scale)
Areate the greenhouse
From Sowing/Planting to Harvest
Drip irrigation
From Sowing/Planting to Harvest

Monitoring

Solution Production stage (if possible with reference to BBCH scale)
Observation: presence/absence
From Sowing/Planting to Harvest

Control

Regulations surrounding biological products can change rapidly – always verify products recommended here with the most recent legislation and lists of products registered for your country
Solution Product Category
Bacillus amyloliquefaciens - FZB24
Microbiological fungicide

Regulations surrounding chemical products can change rapidly – always verify chemicals recommended here with the most recent legislation and lists of products registered for your country
Solution Product Category Production stage (if possible with reference to BBCH scale) Max nb. of a. i. application/year Application Details and Notes (commercial product example) Chemical Group Risk resistance (FRAC Code)
Mandipropamid
Synthetic fungicide
Start of treatments since there are favorable conditions for the development of infection. Suspend treatments 3 days before harvest
4 (For all CAAs)
(PERGADO SC®) Dosage: 0,6 L/ha.
CAA-fungicides (Carboxylic Acid Amides)
Low to medium risk (40)
Propamocarb
Synthetic fungicide
Start of treatments since there are favorable conditions for the development of infection. Suspend treatments 3 days before harvest
2
(PREVICUR® ENERGY) Nursery, soil and foliar treatments possible. Read label to know dosages
Carbamates
Low to medium risk. (28)
Azoxystrobin
Synthetic fungicide
Start treatments no earlier than 3 weeks after transplanting. Suspend treatments 3 days before harvest
3 (Between Fenamidone, Pyraclostrobin, Tryfloxistrobin and Azoxystrobin)
(ORTIVA®) Dosage: 0,8-1 L/ha.
QoI-fungicides (Quinone outside inhibitors)
High risk (11)
The information made available here has been obtained from or is based upon sources believed by CABI to be reliable but is not guaranteed as to accuracy or completeness. Anyone acting or relying on such information does so entirely at their own risk. The efficacy of the IPM methods included above will depend on local conditions and might not always be suitable everywhere within the specified country.