PHYTOTOXICITY AND RESIDUAL EFFECTS OF SOME HERBICIDES ON WHEAT PLANTATIONS

Abstract

Weeds infestation is one of the most important factors that impose a great threat to wheat yield and is highly reducing yield. In order to alleviate the weeds infestation in wheat (Triticum aestivum), the present study was conducted on wheat cultivations during season 2013/14 and 2014/15 to evaluate phytotoxicity effects of some herbicides on wheat, effectiveness of these herbicides on weed control in wheat crop, the estimated residues in wheat plants and yield and quality of wheat after treatment by herbicides. The field experiment was carried out in Agricultural experimental station of Etay El-barod, El-Beheira, using randomized complete block design (RCBD) with four replicates for each treatment and unweeded check, having two rates of both herbicides recommended and double recommended rates (R, 2R). Treatments comprised of post-emergence application of pyroxsulam, flumetsulam+ florasulam, tribenuron-methyl, diclofop-methyl and tralkoxydim. The results indicated that biological parameters of wheat (plant height, growth