In Table 1 the essential elements of an Integrated Control strategy for late blight in Europe are presented and estimated ratings (based on expert judgement) for implementation, barriers and contribution to input reduction are given.

Table 1

Elements	Implementation	Barriers	Input reduction	Organic
Crop Rotation	Only on best farms/in some regions/in some countries	Economic/costs AND limited influence on blight	Intermediate	Applicable in organic farming
Primary inoculum sources	Only on best farms/in some regions/in some countries	Economic/costs AND risk perception	Intermediate	Applicable in organic farming
Planting time and density	Only on best farms/in some regions/in some countries	Economic/costs AND limited influence on blight	Small	Applicable in organic farming
Fertilization	Only on best farms/in some regions/in some countries	Limited influence on blight	Small	Applicable in organic farming
Irrigation	Widespread in practice	Limited influence on blight	Small	Applicable in organic farming
Cultivar resistance	Only on best farms/in some regions/in some countries	Economic/costs AND risks AND risk perception	Lower dependency on chemicals AND Large	Applicable in organic farming
Fungicides	Widespread in practice	Economic/costs AND risk perception	Intermediate	Not applicable in organic farming, except that some countries allow use of Copper
DSS	Only on best farms/in some regions/in some countries	Economic/costs AND risk perception	Intermediate	Applicable in organic farming, excluding fungicide modules etc.
Desiccation	Widespread in practice	Risk perception	Small	Applicable in organic farming, excluding dessication by applying chemicals
Harvest	Widespread in practice	Economic/costs	Small	Applicable in organic farming
Storage	Widespread in practice	Economic/costs	Small	Applicable in organic farming

Implementation: the degree the Best Practices (BPs) are used on farmers fields Barriers: description of the barriers why BPs are not used in practice such as costs, labour, risk perception and available registrations. Contribution to input reduction: description of the contribution of the BPs to a lower dependence of chemicals and/or the degree the BPs lower the input of chemicals Organic: describes whether a BP can also be applied in organic potatoes.