Analisi dell'accrescimento di SORGHUM HALEPENSE resistente e sensibile agli inibitori dell' ACCASI e dell' ALS

This thesis deals with the growth analysis of Johnsongrass susceptible and resistant to the ACCase and ALS inhibitors. It analyses the weed killer influence on the evolution of the resistance among the three populations. It tries to determinate the possible fitness cost that is linked to the resistance to a specific group of weed killers in Johnsongrass. As these plants came from different European countries, they grew in different environments and cultivations. 10 populations of Johsongrass have been used; they were studied from 2005 to 2009. Johnsongrass resistant to ACCasi inhibitors were treated with Fusilade Max; Johnsongrass resistant to ALS inhibitors were treated with Ghibli. On the other hand the susceptible plants were no treated. Steams, leafs, roots and ears were measured 4 times during their life cycles. The outcomes have been reported in graphics. Finally, the growth and allometric analysis have underlined the dissimilar productivity among the three different plants.