Mixture of new and current herbicides for weed control in corn single cross 647

Subject Areas : Journal of Plant Ecophysiology

somayye esfandyari ¹ , farrokh dinqezli ² , mansore moeini ³

1 - گروه شناسایی و مبارزه با علف‌های هرز ، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران
2 - مرکز تحقیقات کشاورزی و منابع طبیعی فارس، زرقان، ایران
3 - گروه شناسایی و مبارزه با علف‌های هرز ، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران

Received: 2015-05-18 Accepted : 2015-05-18 Published : 2015-05-01

Keywords: Corn, Herbicide, Weeds, Grain yield, nicosulfuron, ultima,

Abstract :

To study the effect of different and mixture herbicides on weeds control of maize an experiment base on Randomized Complete Block Design with four replications was conducted at the Agricultural Research Center of Zarghan in 2013. The experiment consisted of 10 treatments including separate and combined application of herbicide nicosulfuron, ultima, bromicide MA and 2,4- D by different dose in addition with weedy and weed free during growth season. All of herbicides were effective on broadleaf weed control such as pigweed, lambsquarters and borage. The highest dry weight of weeds was related to weedy treatment, 2-4-D herbicide (1.5 L/ha) and CMA (bromoxynil+MCPA) 1.5 L.ha during growth season. Reduction in herbicide doses of nicosulfuron and ultima (1.5 L/ha and 150 g/ha) were successful in weed control.  While application of Bromicide with 0.5 L/ha besides nicosulfouron 1 L/ha and citogate surfactants did not have proper control of johnson grass. Maximum height, number of kernels per ear, ear length, 1000 grain weight and biological yield were related to non-control. The highest grain yield, was related to weed control treatments than nicosulforun (2 and 1.5 L.ha) ultima 175 and 150 g/ha) and bromicide (0.5 L.ha plus nicosulforun 1.5 Lha). Grain yield reduction was 45 percent in control treatment compared to control weeds. Reduction of grain yield was also 27 and 37% with 2-4-D and Bromicide respectively, compared to control weeds.