Improving the Efficiency of Herbicides by Adding Mineral Oil on Maize (Zea mays L.) Crop and Associated Weeds

A FIELD experiment was conducted during 2018 and 2019 seasons, at Sakha Agricultural Research Station, Kaferelshiekh, Egypt. To study the efficacy certain herbicides [Nicosulfuron (Shamshon 75%WG), Flumetsulam (Candy 80%WG), Bromoxynil + Terbuthylazine (Monester 35%SE) and Nicosulfuron + Bromoxynil (Scrop 75%WG)] at full rate (alone) (30g, 30g, 500cm(3) and 120g /fed.), respectively, and at used rate (75 or 50%) of full rate mixtures with mineral oil at 1 and 2%, beside, Maisterpower 4.53% OD (Foramsulfuron-sodium + iodosulfuron-methyl-sodium + Thiencarbazone-methyl) at full rate (alone) 500cm(3)/fed., (fed= feddan=0.42 hectare), hand hoeing (twice) and weedy check on weed control, productivity and grain quality. Each experiment was laid out a Randomized Complete Blocks Design. Results revealed that both (Monester and Scrop) at used rate 75%+ min.oil 1% or Maister power at full rate gave more controlling effect on total weeds which was reflected to increase yield and its components, than other treatments in both seasons. Also, previous treatments gave increasing grain yield which was directly correlated with increasing vegetative growth traits, yield components and quality characters of grains compared to other treatments in both seasons. Results indicated that the herbicide and adjuvants selected and relative amount used both of them must be tailored to specific condition of each application, therefore, it could replace the two herbicides (Monster or Scrop) at used rate 75% with min.oil 1% by Maister power at the full rate (alone), to avoid the appearance development weeds-resistant to herbicide, beside, without loosing weed control efficiency and grain yield, its components and quality in maize.