Urmia University Research in Field Crop Journal 2345-3818 2 1 2014 09 23 Evaluation of pre and post-emergence herbicides on weed control and yield and yield components of corn (Zea mays L.) in the Susa region Evaluation of pre and post-emergence herbicides on weed control and yield and yield components of corn (Zea mays L.) in the Susa region 28 37 20014 FA Mohammad Rezvani Associate Professor, Department of Agronomy and Plant Breeding, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran Leili Rahimnezhad M.Sc. Former, Department of Agronomy, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran Hassan Karamzadeh M.Sc. Student, Young Researchers and Elite Club, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran Journal Article 2014 02 20 In order to investigate effect of pre and post-emergence herbicides on weed control and yield and yield components of corn in the Susa region a field experiment was conducted in the randomized complete block design with 7 treatments and 5 replicates at 2010. Treatments were included application of Eradican as soil application before planting, Eradican as herbigation with first irrigation, Cruz, Equipe and Ultima herbicides as post emergence and none weeding and hand weeding as control treatments. Weed species density and dry matter were measured in 2 stages including 15 and 30 days after spraying. Yield and yield components of corn was evaluated after harvesting. Weeds species including Echinochloa crus-galli, Cyperus rotundus and Cleome viscosewereasdominant in the field.Cruz, Equipe and Ultima herbicides had the greatest effect on weed density and dry matter reduction. Cruz herbicide controlled Cleome viscosecompletely. Result of analysis of variance showed that economic yield of corn was affected by experimental treatments. The greatest economic yield (14.89 ton/ha and 14.03 ton/ha, respectively) was obtained in treatments that Cruz and Equip herbicides were used. Therefore, Cruz and Equip herbicides could be recommended to the Susa region farmers for optimal weeds control and achievement to high yield. In order to investigate effect of pre and post-emergence herbicides on weed control and yield and yield components of corn in the Susa region a field experiment was conducted in the randomized complete block design with 7 treatments and 5 replicates at 2010. Treatments were included application of Eradican as soil application before planting, Eradican as herbigation with first irrigation, Cruz, Equipe and Ultima herbicides as post emergence and none weeding and hand weeding as control treatments. Weed species density and dry matter were measured in 2 stages including 15 and 30 days after spraying. Yield and yield components of corn was evaluated after harvesting. Weeds species including Echinochloa crus-galli, Cyperus rotundus and Cleome viscosewereasdominant in the field.Cruz, Equipe and Ultima herbicides had the greatest effect on weed density and dry matter reduction. Cruz herbicide controlled Cleome viscosecompletely. Result of analysis of variance showed that economic yield of corn was affected by experimental treatments. The greatest economic yield (14.89 ton/ha and 14.03 ton/ha, respectively) was obtained in treatments that Cruz and Equip herbicides were used. Therefore, Cruz and Equip herbicides could be recommended to the Susa region farmers for optimal weeds control and achievement to high yield.

https://rfcj.urmia.ac.ir/article_20014_1cc6d836886bf11b70b82c9e6597b75c.pdf