Terminal bud weevil risk assessment - Cloned

Terres Inovia's "Terminal bud weevil" risk assessment tool can be used to evaluate the risk associated with terminal bud weevil, at plot level.

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Tool description

The tool is used in parallel with, and in addition to, the information provided by monitoring yellow vials ideally positioned in a network (BSV type).

This tool can be used to classify a plot into a global risk level. The overall risk combines an agronomic risk and a risk linked to the weevil's historical harmfulness in the département.

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

The tool has been built by integrating trial results 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 may evolve over the years as new references are acquired.