Risk estimate for flea beetle larvae (winter flea beetle)

The risk assessment for flea beetle larvae should be carried out from the second half of November, and repeated throughout the winter if conditions are mild.

Dans quel département se situe votre exploitation ?

Le colza est-il dans un contexte favorable à sa croissance à l’automne ?

Oui

Non

Le colza est-il bien enraciné ?

Oui

Non

Les colzas commencent-ils à rougir ?

Oui

Non

Population

Quel est le peuplement (nombre de plantes/m2) ?

Quel est la biomasse des colzas fin novembre ?

g/m2

Combien de larves de grosses altises observez-vous par plante ?

I agree to share this data with Terres Inovia.

Oui

Non

Tool description

Little information required

The information to be provided includes: department, soil type, history of peas and irrigation. These are few in number, but must be filled in very precisely.

A tool that can be used in most regions

The EvA tool was developed from a database containing information on 780 plots in the northern half of France, then validated on 120 plots, mainly in the Normandy and Centre-Val de Loire regions. This tool can be used in the Bourgogne-Franche-Comté, Bretagne, Centre-Val de Loire, Grand Est, Hauts-de-France, Île-de-France, Normandie, Nouvelle-Aquitaine and Pays de la Loire regions.

Points of attention

At present, only the effect of a winter or spring pea crop on the evolution of a soil's Infectious Potential is known. The effect of other susceptible legumes has not yet been taken into account in this tool, for lack of data. Consequently, for plots that have received one or more susceptible legumes other than pea as a main, intermediate, associated or companion crop, the risk may be underestimated. Only the bioassay can be used to estimate the risk in these plots*.
*Susceptible legumes: lentil, alfalfa, chickling vetch, certain vetch species/varieties (Access the test) "