Description
OBSERVER PRO – effective protection of potato against potato late blight
OBSERVER PRO is a fungicide in concentrate form (SC), intended for professional protection of potato crops against one of the most dangerous pathogens – potato late blight.
The product contains two active substances: propamocarb and zoxamide, which act through different mechanisms, ensuring comprehensive plant protection.
Benefits for the potato grower
- effective control of potato late blight
- preventive and curative action
- combination of two modes of action
- protection of new growth
- stable performance under variable weather conditions
Mode of action – double protection of the crop
Propamocarb acts systemically, limiting pathogen development inside the plant, while zoxamide acts on the surface, blocking mycelium growth and spread of infection.
Thanks to the combination of these two mechanisms, OBSERVER PRO:
- has preventive action – protects healthy plants
- has curative action – limits infection development
- provides protection of new growth
Use in potato cultivation
OBSERVER PRO is intended for use in professional potato crops where effective and stable protection against late blight is required.
- potato late blight (Phytophthora infestans)
Treatment strategy and application timing
The product should be applied from the stage of intensive plant growth, from the development of side shoots (BBCH 21) until the end of fruit development (BBCH 79).
The first treatment should be carried out:
- at the appearance of the first disease symptoms
- or according to the warning system
Subsequent treatments should be performed at intervals of at least 7 days, depending on disease pressure.
Role in the protection programme
OBSERVER PRO should be used as part of a protection programme, in rotation with other fungicides to reduce the risk of pathogen resistance development.
Notes
Effective treatment requires thorough coverage of plants with the working liquid. Do not exceed the number of treatments and use the product according to the label.
Application and dosage
| Crop | Target disease | Recommended dose | Application timing | Number of treatments |
|---|---|---|---|---|
| Potato | Potato late blight | 2.0 l/ha | BBCH 21–79 | max 3 (at least every 7 days) |













