Varietal resistance Clause Samples

Varietal resistance. The development and introduction of resistant varieties is an important and promising crop protection method for limiting the use of crop protection products in general. Advances in plant genetics have enabled breeders to introduce resistance factors into cultivated varieties, for example through crosses with related wild species. Large-scale agricultural use of these varieties, however, quickly revealed pests species’ ability to overcome these forms of resistance. Mechanisms of plant resistance to pests – mobilized both by breeding programs and by the use of plant defence stimulators (section 4.4) – are shown in Box 5. Two WoS queries were carried out: the first, targeting relevant review articles pertaining to all crops (not only those relying on the use of copper), yielded 66 citations; the second, targeting primary articles relating specifically to the crops and pathogens involved in copper applications, yielded 422 citations. In addition, the analysis included a handful of citations from the grey literature. Among the 422 primary articles, 125 were focused on apples, 118 on potato, 42 on tomato, 20 on grapevines, and 14 on lettuce. The analysis thus focused primarily on these five crops of major agronomic importance. The part of the analysis focused on the sustainable management of resistance was not limited to these five crops, since relevant articles were found from both WoS queries.