CRITICAL PERIOD OF WEED CONTROL IN TOBACCO (NICOTIANA TOBACUM L.) IN GUILAN PROVINCE

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MEAMAR ZAHEDANI M.; ASGHARI J.; AMINI IRAJ; BABAEIAN JELOUDAR N.A.; BARZEGAR KHOU M.H.

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Journal: IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE) Year:2007 | Volume:38-1 | Issue:2 (AGRONOMY AND CROP BIOTECHNOLOGY) Page(s): 277-285

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Title

CRITICAL PERIOD OF WEED CONTROL IN TOBACCO (NICOTIANA TOBACUM L.) IN GUILAN PROVINCE

Author(s)

Keywords

TOBACCOQ2

CRITICLA PERIODQ3

WEED CONTROLQ3

WEED COMPETITIONQ2

Abstract

To determine the critical period of WEED CONTROL in TOBACCO, an experiment was conducted in TOBACCO Research Institute of Rasht in 2005. The experiment was conducted using a randomized complete block design with three replications and 12 treatments of hand weedings in two sets. The first set of treatments included weed infested periods of 0, 10, 30, 50, 70, and 85 days after TOBACCO transplantation (DAT) and the second set of treatments included weed free periods of 0, 10, 30, 50, 70, and 85 days. These two sets of treatments were fitted to Logistic and Gompertz functions to determine the critical period of WEED CONTROL. Crop height, number of leaves, crop yield, the number and weight of weeds in a square meter of each plot before harvesting were also determined. The most dominant weeds of the field were Purple nutsedge (Cyperus rotandus L.), Large crabgrass (Digitaria sanguinalis L.), Yellow foxtail (Setaria glauca L.), Bermudagrass (Cyndon dactylon (L.) Pers). and Redroot Pigweed (Amarantus retroflexus L.). Increasing the periods of controlling weed infestation reduced the number of weeds and created a better condition for TOBACCO growth. Critical periods of WEED CONTROL between 27 and 50 DAT and between 23 and 59 DAT were found as suitable, while allowing 10% and 5% acceptable yield reduction, respectively. A positive relation was observed between controlling weeds within critical the period of WEED CONTROL and plant height as well as number of leaves. By increasing weed free periods, plant height, and the number of leaves were increased.

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APA: Copy

MEAMAR ZAHEDANI, M., ASGHARI, J., AMINI, IRAJ, BABAEIAN JELOUDAR, N.A., & BARZEGAR KHOU, M.H.. (2007). CRITICAL PERIOD OF WEED CONTROL IN TOBACCO (NICOTIANA TOBACUM L.) IN GUILAN PROVINCE. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 38-1(2 (AGRONOMY AND CROP BIOTECHNOLOGY)), 277-285. SID. https://sid.ir/paper/8451/en

Vancouver: Copy

MEAMAR ZAHEDANI M., ASGHARI J., AMINI IRAJ, BABAEIAN JELOUDAR N.A., BARZEGAR KHOU M.H.. CRITICAL PERIOD OF WEED CONTROL IN TOBACCO (NICOTIANA TOBACUM L.) IN GUILAN PROVINCE. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)[Internet]. 2007;38-1(2 (AGRONOMY AND CROP BIOTECHNOLOGY)):277-285. Available from: https://sid.ir/paper/8451/en

IEEE: Copy

M. MEAMAR ZAHEDANI, J. ASGHARI, IRAJ AMINI, N.A. BABAEIAN JELOUDAR, and M.H. BARZEGAR KHOU, “CRITICAL PERIOD OF WEED CONTROL IN TOBACCO (NICOTIANA TOBACUM L.) IN GUILAN PROVINCE,” IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), vol. 38-1, no. 2 (AGRONOMY AND CROP BIOTECHNOLOGY), pp. 277–285, 2007, [Online]. Available: https://sid.ir/paper/8451/en

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