Agronomic solutions in perspective
- Mildium
- Decision support tool to limit the number of treatments
- Mildew: 7 treatments max - 2 min, Oïdium: 5 max - 2 min
- Plot decision indicators and acceptability of losses
- Secure efficiency in the event of high parasite pressure
- Reasoning the coupling / decoupling of mildew - powdery mildew
>>>> In the process of validation at the scale of the plot, a lot of observation time required
- Variety creation
- Identify disease tolerance or resistance genes in rootstocks or grape varieties
- Risk of bypassing genes if monogenic resistance
>>>> For the moment at the research stage, not accepted at the social and legislative level
- PNPP (Natural Preparations of Low Concern) prepared on the farm, these substances are used instead
or in addition to conventional phytosanitary treatments
- SDN (Natural Defenses Stimulator): substance that allows the plant to trigger at least one mechanism
defense against a bio-aggressor (botrytis, mildew, powdery mildew for the moment)
The elicitors come from various origins:- from living organisms (glucolipids, proteins),
- Derived from plants by extraction or enzymatic degradation,
- Various molecules such as salicylic acid, silica, certain fungicides (phosphonates, strobilurins), Bth
(acibenzolar-S-methyle), - molecules currently sold as fertilizers and which would have eliciting or bio-fungicidal properties
(their effectiveness in this regard remains to be demonstrated). - Only 1 elicitor approved on vines against powdery mildew, based on fenugreek
>>>> Brake: No approval standard specific to SDN or PNPP, little knowledge of their modes of action and their effectiveness
- Spawning repellents
- Kairomones mimicking cluster budworm egg saturation, prompting females to lay eggs elsewhere
>>>> Repellents patented in the 90s but no product available today
- Biological control by conservation
- Maintenance of favorable conditions for the establishment and development of natural predators of pests of the
vine - Maintenance of ecological reservoir zones near the plots, choice of products according to their ecotoxicity
- Maintenance of favorable conditions for the establishment and development of natural predators of pests of the
>>>> Lack of data on the impact of products on the populations of auxiliaries, on the role of auxiliaries on the expected product savings
- Inter cultures nematicides
- Put in place during the rest of the soil before replanting the vine. Their implantation would prevent disinfection
chemical soil to fight against the court-knotted.
- Put in place during the rest of the soil before replanting the vine. Their implantation would prevent disinfection