List of Articles annual weed

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  1 - Effect of Soil Tillage Methods and Wheat (Triticum aestivum L.) Residue on Weed Growth and Yield Response of Corn (Zea mays L.)
  Jahanbakhsh Mirzavand Somayeh Rafiee Reza Moradi-Talebbeigi
  Changing tillage systems and plant residue application are regarded as suggested methods to improve weed management. A 3-year field experiment was conducted to evaluate the effects of soil tillage methods (conventional tillage (CT), reduced tillage (RT), and no-till (NT More

  Changing tillage systems and plant residue application are regarded as suggested methods to improve weed management. A 3-year field experiment was conducted to evaluate the effects of soil tillage methods (conventional tillage (CT), reduced tillage (RT), and no-till (NT)) and wheat residue (residue preservation and removal) on weed growth and corn yield at Zarghan, Fars province. The experimental design was as split plot based on randomized complete block in three replications. Results showed that the lowest weed growth was obtained by CT method when wheat residue preserved while applying NT method enhanced perennial weed infestations. In other words, applying NT method increased perennial weed density up to 60% compared to CT and RT methods, but annual weed infestations decreased 40%. The kernel yield of corn (14447.64 kg ha-1) increased 34% when RT method accompanied by wheat residue compared to NT method. Applying CT method and residue preservation was maximized kernel number per cob (No. 576) and harvest index (36.82%) compared to RT and NT methods by four and 15%, respectively. It is concluded that, in consecutive corn cultivation, to grantee the corn yield potential and suppress weed growth applying RT method and preservation of 30% of wheat residue (standing residue with a height of 30 cm), is recommended. Manuscript profile
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  2 - Effect of pre and post emergence herbicides and mixture of them on control of spring and summer weeds in apple and grape orchards
  batoul samedani Seyyed Mihsen Hoseyni Seyed Mihamad Mir vakili
  These experiments were conducted in order to study effect of pre and post emergence herbicides on grass and broad leaf weeds in vine orchards in Qazvin and apple orchards in Tehran in 2008-2009. Experimental design was factorial with two factors and three replications. More

  These experiments were conducted in order to study effect of pre and post emergence herbicides on grass and broad leaf weeds in vine orchards in Qazvin and apple orchards in Tehran in 2008-2009. Experimental design was factorial with two factors and three replications. Factor one was pre emergence herbicides (diuron (WP 80%) 1.6 kg a.i. ha-1, napropamide (SC 45%) 4.1 kg a.i. ha-1, oxyfluorfen (EC 24%) 0.48 kg a.i. ha-1, trifluralin (EC 48%) 1.2 kg a.i. ha-1, and check (no herbicide) and factor two was post emergence herbicides (glayphosate (SL 41%) 2.5 kg a.i. ha-1+ 8 kg ha-1 ammonium sulfate, glayphosate (SL 41%) 2.5 + 2.5 kg a.i. ha-1 plus ammonium sulfate 8+8 kg ha-1, triclopyr (EC 62%) 1.2 kg a.i. ha-1, and triclopyr 1.2+1.2 kg a.i. ha-1). The results showed that pre emergence herbicides, especially napropamide, oxyfluorfen and trifluralin controlled annual winter weeds. One time use of glayphosate could control annual weeds, but not perennial weeds. One and two times use of triclopyr and two times glyphosate controlled perennial weeds. Use of pre emergence plus post emergence herbicides controlled perennial weeds well. Napropamide and trifluralin plus triclopyr reduced weeds, but diuron plus post emergence herbicides provided best broadleaf weed suppression. As compared to glayphosate, triclopyr controlled weeds with delay. Manuscript profile
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  3 - Evaluation of efficiency of new pre emergence and post emergence herbicides for weed control in apple and citrus orchards
  batoul samedani Azar Maknali Ebrahim Mamnoei
  Due to the lack of diversity of herbicides in the orchards and the proposal to eliminate some of herbicides, such as parquets, it is necessary to investigate new pre-emergence and post-emergence herbicides in orchards. These experiments were conducted in Tehran in apple More

  Due to the lack of diversity of herbicides in the orchards and the proposal to eliminate some of herbicides, such as parquets, it is necessary to investigate new pre-emergence and post-emergence herbicides in orchards. These experiments were conducted in Tehran in apple and in Desfol and Jiroft in citrus orchards with 13 treatments in a completely randomized block design with 3 replications. Pre-emergence herbicides Napropamide (2.7,3.6, 4.5 kg a.i./ha) (SC 45%) and Trifluralin (1.2 kg a.i./ha )(EC 48%) and post-emergence herbicides a new Glyphosate (0.36, 0.54 kg a.i./ha)(SC 36%), 160g L-1 Amitrole, 143g L-1+ Ammonium thiocyanate + 60g L-1 Glyphosate (ATG) (2.2,2.9,3.6.4.3 kg a.i./ha) (SL 36.6%), Glyphosate (0.62 kg a.i./ha)(SL 41%), Paraquat (0.6 kg a.i./ha )(SL 20%) were the treatments. The results of the experiment showed that the napropamide in Dezful, controlled annual winter weeds 20-42 %, and in Jiroft in amounts of 3.6 and 4.45 kg a.i./ha, controlled 27 percent, while in Tehran because of perennial weeds unable to control winter weeds. Trifluralin herbicide at this time was not able to control weeds in all areas. Among post-emergence herbicides, ATG herbicides in the amounts of 3.6 and 3.6 kg a.i./ha and new glyphosate in the amount of 0.54 kg a.i./ha with paraquat and glyphosate were able to control summer weeds. According to the results of this study, it seems that the pre-emergence herbicide of napropamide at 3.6 kg a.i./ha, post- emergence herbicides ATG at 3.6 kg a.i./ha and new glyphosate at 0.54 kg a.i./ha are recommendable in orchards. Manuscript profile