Wheat Lodging and Yield in Response to Cultivars and Foliar Application of Paclobutrazol

Two field experiments were conducted at the Research and Experimental Center of Faculty of Agriculture at Moshtohor, Benha University, Egypt, during 2015/16 and 2016/17 winter seasons to evaluate five wheat cultivars includes Misr 2, Gemmeza 11, Shandaweel 1, Giza 171 and Sids 12 under threefoliar application of Paclobutrazol }plant growth retardant (PGR){ at rates 0, 100, 200 ppm fad^-1 for root lodging, yield and yield components. The obtained results for combined analyses were as follows:
The significant effect of PGR observed for root dry weight plant^-1, plant height, No. of tillers m^-2, No. of spikes m^-2, No. of kernels spike^-1 and straw yield fed^-1. Cultivars were varied significantly in lodging score, root dry weight plant^-1, plant height, No. of tillers m^-2, No. of spikes m^-2, seed index, grain yield fed^-1, straw yield fed^-1 and harvest index. While PGR×cultivars interactions showed no significance effect on all these traits.