General Use Recommendations
Fungicide programs must deliver effective disease management. Apply OSBPIs at effective rates and intervals according to manufacturers’ recommendations. Effective disease management is a critical component to delay the build-up of resistant pathogen populations.
Apply OSBPIs only preventatively and in mixtures with
effective fungicides from different cross-resistance groups.
The mixture partner should give effective control of the target disease(s) at the rate and interval selected.
Foliar exposure to OSBPI products should not exceed thirty-three percent (33%) of the total period of protection needed per crop.
The number of foliar applications of OSBPI products within a total disease management program must be limited as follows:
All other crops:
- Make no more than four (4) applications or 33% of the total period of protection needed per crop, whichever is more restrictive.
- Where the total number of fungicide applications targeting oomycetes is less than three (3), apply no more than one (1) application of an OSBPI product.
- There should be no more than two (2) foliar applications of any OSBPI product for the control of soil-borne pathogens.
Applications of OSBPI products are to be made no more than three (3) times in sequence before applying a fungicide with a different mode of action.
Applications of OSBPI products can be made in alternation with a fungicide with a different mode of action.
No foliar fungicide application of an OSBPI fungicide should be made following a seed/soil treatment* with OSBPI fungicides targeting the same pathogen.
* Directed stem sprays are interpreted as foliar not soil application.
In case of multiple crops, do not make more than six (6) foliar applications of OSBPI product per year on the same acreage, targeting the same pathogen.
Do not make more than one seed/soil treatment application of OSBPI per year on the same acreage, targeting the same pathogen.
OSBPI products must not be used in nursery production of transplanted agricultural crops.