Canadian Journal of Basic and Applied Sciences ©PEARL publication, 2015 CJBAS Vol. 03(04), 108-117, April 2015 ISSN 2292-3381 Efficacy of post-emergence herbicide for managing Diplachne fusca in sugarcane field Nooshin Ghanbarpour  , Eskandar Zand, Noorali Sajedi Department of Weed science, Faculty of Agriculture, Islamic Azad University, Arak Branch. Keywords: Abstract herbicide, post emergence, Diplachne fusca, Sugarcane A study to determine the relative efficiency of chemical weed control was conducted at the research and education institute of Khuzestan sugarcane industry, Iran, during 2011- 2012. The experiment comprised of nine treatments (Dinamic at 2 kg ha -1 , Gramaxone at 2 L ha -1 , Gesapax at 2 kg ha -1 , Basta + surfactant at 8 L ha -1 , Cruz at 2 kg ha -1 , Sencor+ surfactant at 3 kg ha -1 , Sencor + Gesapax at 1.5+ 1.5 kg ha -1 respectively, Roundup at 8 L ha -1 , Krismat at 2.5 kg ha -1 and control) were tested against Diplachne fusca. The test replicated 3 and 4 times under greenhouse and field conditions, respectively. The detail of treatment is given at table- 2 and table- 4. ANOVAs were carried out with SAS. Software and differences in means were detected by using the Duncan test at p = 0.05. During our study, the least loss dry weight of weed was observed in Gesapax treatment that were not significantly different with control. According to our research, it seems that either at field condition with Roundup and Basta + surfactant or at greenhouse condition with the combination of Sencor + Gesapax that was not significantly different with Krismat, Roundup, Sencor+ surfactant and Basta + surfactant, left highest impact on D. fusca. This study demonstrates (under field and greenhouse condition) Gesapax as post emergence spray proved less effective than other treatments. This study demonstrates that the weed D. fusca was not effectively controlled by these current herbicides. 1. Introduction Khuzestan Province, is one of the 31 provinces of Iran. It is located in the southwest of the country, bordering Iraq's Basra Province and the Persian Gulf. Its capital is Ahvaz and covers an area of 63,238 km². Sugarcane growing countries of the world are lying between the latitude 36 o N and 31 o S of the equator extending from tropical to subtropical zones. Worldwide in 107 countries, sugarcane occupies area of 20.42 million ha with a total production of 1333 million tons [1]. Area under sugarcane cultivation in Iran during 2010-2011 was 60146 ha that more than 99 percent located at Khuzestan province.  Corresponding Author : E-mail, n.ghanbarpour@yahoo.com