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Figure 1 Average use of plant protection products in the former 15 EU member states for the nine most important crops. Source: EU-Study Contract No AGR 30881 of 30/12/2002 Study on the Use of the Varieties of Interspecific Vines

Figure 1 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Figure 2 Schematic representation of milestones in grapevine resistance breeding in relation to a rough time frame. American and French hybrids are generally of poor quality and must be considered as an intermediate step in grapevine breeding. Breeding programs started later revealed high quality fungus resistant varieties with several excellent breeding lines forthcoming. Development of genetically modified (GM) varieties ready for the market remains a long-term goal

Figure 2 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Figure 3 The two strategies which can be followed to improve grapevine and their outcome are indicated. Improved new varieties from conventional breeding proved to be successful and first varieties have been accepted on the market. Improved traditional varieties obtained by gene transfer are a long-term goal. It is expected that varietal quality characteristics are not changed as far as improvements for resistances are concerned

Figure 3 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Figure 4 History of variety Regent

Figure 4 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Figure 5 Degree of downy mildew infection on berry and leaf of Regent compared to standard varieties (1 = no infection, 9 = heavy infection; n = No. of observations). Note: No sprayings of Regent for downy mildew; normal spraying program for varieties of comparison

Figure 5 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Figure 6 Degree of powdery mildew infection on berry and leaf of Regent compared to standard varieties (1 = no infection, 9 = heavy infection; n = No. of observations ). Note: No sprayings of Regent for powdery mildew; normal spraying program for varieties of comparison

Figure 6 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Table 1 Calculation of production costs of fungus susceptible varieties compared to varieties with fungus resistance.< Source: EU-Study Contract No AGR 30881 of 30/12/2002 Study on the Use of the Varieties of Interspecific Vines

Table 1 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
Table 2 Results of evaluation tests in different German vinegrowing areas (performance characteristics)

Table 2 / R. Eibach and R. Töpfer / Results and Perspectives of Resistance Breeding in Grapes
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