PHYTO'AIDE Advices for reducing the risks of transfer of phyto-sanitary products to the environment.

The scores displayed by PHYTO'AIDE come from the I-PHY indicator and are given on a qualitative scale of 0 (maximum risk of transfer) to 10 (very little risk) and where a score greater than 7 is considered as limiting the transfer risks. The PHYTO'AIDE regression tree allows to visualize the scores of more than 1000 scenarios use of the pesticide. These scenarios are constructed by varying the constituent usage variables of the I-PHY score (except for the pesticide and soil you are testing). The variations tested are on the values either favorable or unfavorable for each variable. So that, starting from the average I-PHY score of all scenarios (score displayed in the blue circle at the top of the tree), depending on whether the value taken by the variable is favorable or unfavorable, this mean score will be degraded (red branch of the tree, which means that the risk increases) or on the contrary increased (green branch of the tree, which means that the risk decreases). The higher the variables in the tree plus they have importance in building the I-PHY score. The minimum score for all scenarios tested by PHYTO'AIDE is at the bottom left of the tree and the maximum right. The difference between these two the margin of progress possible by maneuvering the various levers (transition from the unfavorable to favorable condition of the variables)