Efficacy Evaluation of Some Registered Herbicides of Rice on Weed Control and Yield of Ratoon Rice (Oryza sativa L. )

Subject Areas : Semi Annual Journal of Weed Ecology

Rahman  Khakzad ¹ (دانشجوی دکتری علوم علفهای هرز دانشگاه محقق اردبیلی)
Reza  Valiolah Poor ² (استادیار بخش تحقیقات آفات و گیاه پزشکی مرکز تحقیقات کشاورزی و منابع طبیعی مازندران)
Mohammad Taghi  Al Ebrahim ³ (استادیار گروه علفهای هرز دانشگاه محقق اردبیلی)
Nour Mohammad  Nazari ⁴ (دانشجوی دکترای اگرواکولوژی دانشگاه علوم کشاورزی و منابع طبیعی گرگان)

Received: 2013-07-15 Accepted : 2014-11-02 Published : 2015-09-22

Keywords:

Abstract :

In 2001, an experiment was conducted to evaluate the performance of different herbicides on weed control and yield of ratoon rice in a randomized complete block design with four replications in the Pasha Cola village in Sari, Iran. The treatments were Anilofos + Ethoxysulfuron (3 lit ha-1), Butachlor (3 lit ha-1) + Setoff [Cinosulfuron (100 grams ha-1)], Londox [Bensulfuron methyl (75 g ha-1)] + Butachlor (3 lit ha-1), Butachlor (3 lit ha-1), Cinosulfuron (100 g ha-1), Bensulfuron methyl (75 g ha-1) along with a two-step weeding and weedy treatment (control). Generally, the results showed that the Sulfonylurea herbicides such as Cinosulfuron and Bensulfuron methyl reduced both the density and dry weight of weed and the density and dry weight of weed in total during the growing season. It led to increase in ratoon rice yield at the end of the growing season. In addition, the results showed that the Butachlor did not affect on the density and dry weight of weeds so that it caused a reduction in weight of 1000 grain and yield of ratoon rice.