Powdery mildew

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Pseudoidium neolycopersici (tomato powdery mildew); Symptoms on tomato leaf. February 2016. Image copyright: ©CABI (taken by Dr Philip Taylor)

Monitoring

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

Control

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)
Boscalid
Synthetic fungicide
When first symptoms occur
3 (Among Boscalid, Fluopyram, Pentyopirad, Fluxapyroxad, Isopyrazam)
(BAS 510 01 F) Contact fungicide with translaminar properties. Dosage 0,2 Kg/ha
SDHI (Succinate dehydrogenase inhibitors)
Medium to high risk. (7)
Cyflufenamid
Synthetic fungicide
When first symptoms occur. Suspend treatments 1 day before harvest
2
(TAKUMI) Dosage: 150mL/ha.
Phenylacetamide
Resistance in Sphaerotheca. Resistance management required (U06)
Pyraclostrobin
Synthetic fungicide
When first symptoms occur. Suspend treatments 7 days before harvest
3 (Between Pyraclostrobin, Tryfloxistrobin and Azoxystrobin)
(CABRIO TOP) Cover fungicide with preventive activity. Dosage: 1,5-2 Kg/ha
QoI-fungicides (Quinone outside inhibitors)
High risk (11)
Tryfloxystrobin
Synthetic fungicide
From pre-bloom to pre-harvest. Suspend treatments 3 days before harvest
3 (Between Pyraclostrobin, Tryfloxistrobin and Azoxystrobin)
(FLINT MAX) Dosage: 300 g/ha
QoI-fungicides (Quinone outside inhibitors)
High risk (11)
Azoxystrobin
Synthetic fungicide
When first symptoms occur. Suspend treatments 3 days before harvest
3 (Between Pyraclostrobin, Tryfloxistrobin and Azoxystrobin)
(ORTIVA®) Dosage: 0,8-1 L/ha
QoI-fungicides (Quinone outside inhibitors)
High risk (11)
Fluxapyroxad
Synthetic fungicide
From BBCH 14-89 (greenhouse) to BBCH 50-89 outdoor
2
(DAGONIS) Dosage: 0,6 - 1 l/ha
SDHI-fungicides (Succinate dehydrogenase inhibitors)
Medium to high risk. (7)