DETERMINATION OF THE CRITICAL PERIOD OF VELVETLEAF (ABUTILON THEOPHRASTII) CONTROL IN SOYBEAN (GLYCINE MAX L.) SUMMER CROPPING

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HATAMI MOGHADAM Z.; LATIFI N.; ZEINALI E.

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Journal: AGRICULTURAL RESEARCH Year:2008 | Volume:8 | Issue:1 (A) Page(s): 103-117

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Title

DETERMINATION OF THE CRITICAL PERIOD OF VELVETLEAF (ABUTILON THEOPHRASTII) CONTROL IN SOYBEAN (GLYCINE MAX L.) SUMMER CROPPING

Author(s)

HATAMI MOGHADAM Z. | LATIFI N. | ZEINALI E. | Issue Writer Certificate

Keywords

SOYBEANQ3

VELVETLEAFQ3

CRITICAL PERIOD FOR WEED CONTROLQ3

Abstract

Velvetleaf (Abutilon theophrasti Medic.) is one of the most important warm-season weeds in the field crops such as SOYBEAN. In order to determine the critical period of VELVETLEAF control in SOYBEAN field, an experiment was conducted in Gorgan in 2006 using a randomized complete block design with four replications. The experiments consisted of 2 series of treatments; the first set was control treatments that the crop was kept weed-free until the growth stages of 2 leaf, 4 leaf, 6 leaf stages, beginning bloom and beginning pod. The second set was interference treatments that VELVETLEAF was permitted to grow within the crop until the above-mentioned growth stages. Weedy and weed-free controls were also included in the study. The effects of control and interference treatments were significant on yield, height and maximum leaf area index of SOYBEAN and VELVETLEAF. Correlation between height, dry mater and maximum leaf area index of weed with yield of SOYBEAN were shown a negative linear relation. Using the Gompertz and Logistic equations, it was found that the critical period of controlling VELVETLEAF in SOYBEAN, considering 5% allowence decrease in yield, is between V2 (14 days after emergence or 239 CGDD) to V7 (43 days after emergence or 786 CGDD) leaf stages, while with 10% allowence decrease, is between V3 (18 days after emergence or 394 CGDD) to V5 (35 days after emergence or 616 CGDD) leaf stages.

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APA: Copy

HATAMI MOGHADAM, Z., LATIFI, N., & ZEINALI, E.. (2008). DETERMINATION OF THE CRITICAL PERIOD OF VELVETLEAF (ABUTILON THEOPHRASTII) CONTROL IN SOYBEAN (GLYCINE MAX L.) SUMMER CROPPING. AGRICULTURAL RESEARCH, 8(1 (A)), 103-117. SID. https://sid.ir/paper/84744/en

Vancouver: Copy

HATAMI MOGHADAM Z., LATIFI N., ZEINALI E.. DETERMINATION OF THE CRITICAL PERIOD OF VELVETLEAF (ABUTILON THEOPHRASTII) CONTROL IN SOYBEAN (GLYCINE MAX L.) SUMMER CROPPING. AGRICULTURAL RESEARCH[Internet]. 2008;8(1 (A)):103-117. Available from: https://sid.ir/paper/84744/en

IEEE: Copy

Z. HATAMI MOGHADAM, N. LATIFI, and E. ZEINALI, “DETERMINATION OF THE CRITICAL PERIOD OF VELVETLEAF (ABUTILON THEOPHRASTII) CONTROL IN SOYBEAN (GLYCINE MAX L.) SUMMER CROPPING,” AGRICULTURAL RESEARCH, vol. 8, no. 1 (A), pp. 103–117, 2008, [Online]. Available: https://sid.ir/paper/84744/en

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