Dry edible bean (Phaseolus vulgaris L.) is an important and progressive crop in North Dakota ranking number one nationally in production of dry edible bean increasing from 105,220 to 271,150 hectares from 1985 to 2007. Recent development of Type II dry bean cultivars necessitates investigation of plant response to physical injury since charts are currently specific to Type I and Type III plant types. The objective of this study was to determine the effect of simulated defoliation and stand reduction and its impact on yield and crop performance of Type II dry bean cultivar. The study was conducted during the 2006 growing season at Prosper, Carrington, and Johnstown, ND. Both the defoliation and stand reduction study were both in a RCBD with two replicates, in a split plot arrangement, where cultivar was the main plot and the subplot was a factorial arrangement of growth stage and treatment level. A great northern (Matterhorn) and pinto bean (GTS 900) cultivar with Type IIA and Type IIB plant types were treated at the V5, R1, and R3 growth stages. The treatment levels were 0, 33, 66, and 100% for defoliation, and 0, 25, 50, 75, and 90% for stand reduction. Results indicated a stage by reduction interaction. The data indicated a reduction in yield at the reproductive stages R1 and R3. Yield component analysis indicated a reduction in number of pods per plant and seed weight at R1 and R3 when compared with V5. Cultivars responded similarly to the stand reduction treatments. Preliminary results indicate loss charts should consider growth stage and treatment level.