Risk assessment for flea beetle larvae (winter flea beetle) - Cloned

Tool description

The harmfulness of this pest depends on insect pressure and rapeseed growth dynamics.

The tool's integrated decision rule combines these two aspects, making it possible to estimate a risk linked to the agronomic situation of the plot, as well as a risk linked to larval pressure.

The tool is not a substitute for field observation, which remains essential for any decision-making process.

The overall risk estimate is associated with a recommendation: whether or not to intervene, and which insecticide to use, depending on the insecticide resistance situation in the département.

This tool was developed by integrating trial results, resistance analyses and the expertise of Terres Inovia agents.

The final risk assessment is given here as an indication. It is the responsibility of the user (farmer, technician) to use this risk assessment for the reasoning of any phytosanitary intervention.

The harmfulness of flea beetle and terminal bud weevil larvae depends on :

insect pressure
rapeseed growth dynamics
The decision rule used in this tool combines these two aspects, enabling us to estimate a risk linked to the agronomic situation of the plot, as well as a risk linked to insect pressure.

In order to estimate these two risks, the assessment is based on simple observations to be made in the field when the decision is made.

These decision rules will evolve over the years as new references are acquired.