DETERMINATION OF THE CRITICAL PERIOD FOR WEED CONTROL IN SUNFLOWER (HELIANTHUS ANNUUS CV. RECORD)

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SHAHVERDI M.; HEJAZI A.A.; RAHIMIAN MASHHADI H.R.; TORKAMANI A.

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Journal: Iranian Journal of Crop Sciences Year:2002 | Volume:4 | Issue:3 Page(s): 152-162

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Title

DETERMINATION OF THE CRITICAL PERIOD FOR WEED CONTROL IN SUNFLOWER (HELIANTHUS ANNUUS CV. RECORD)

Author(s)

SHAHVERDI M. | HEJAZI A.A. | RAHIMIAN MASHHADI H.R. | TORKAMANI A. | Issue Writer Certificate

Keywords

SUNFLOWERQ3

CRITICAL PERIODQ3

WEED CONTROLQ2

WEED INTERFERANCEQ2

WEED FREEQ2

COMPETITION AND OIL PERCENTQ2

Abstract

A field experiment was conducted to determaine the CRITICAL PERIOD for WEED CONTROL in SUNFLOWER in Borugerd in southwestern Iran in 1999 cropping season. Treatments included WEED FREE and weed interference periods up to 10, 20, 30, 40 days after emergence and WEED FREE during growing season. Treatmensts were replicated four times in a complete randomized block design. Gampertz and Logestic equations were fitted to WEED FREE and weed interference data. Results showed a CRITICAL PERIOD of WEED CONTROL based on 5% and 10% of acceptable yield loss from 10-43 and 18-33 days after emergence (DAE) equal to 250-1250 and 300-950 GDD or V2 to R1 and V2 to V9 stages, respectively. Weed interference reduced the height, oil and kernel yield. Oil percent was not affected by weed interference or control.

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References

بررسی اثر تنش خشکی در برخی از صفات مورفوفیزیولوژیکی و اجزا عملکرد آفتابگردان (Helianthus annuus L.)

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APA: Copy

SHAHVERDI, M., HEJAZI, A.A., RAHIMIAN MASHHADI, H.R., & TORKAMANI, A.. (2002). DETERMINATION OF THE CRITICAL PERIOD FOR WEED CONTROL IN SUNFLOWER (HELIANTHUS ANNUUS CV. RECORD). IRANIAN JOURNAL OF CROP SCIENCES, 4(3), 152-162. SID. https://sid.ir/paper/57083/en

Vancouver: Copy

SHAHVERDI M., HEJAZI A.A., RAHIMIAN MASHHADI H.R., TORKAMANI A.. DETERMINATION OF THE CRITICAL PERIOD FOR WEED CONTROL IN SUNFLOWER (HELIANTHUS ANNUUS CV. RECORD). IRANIAN JOURNAL OF CROP SCIENCES[Internet]. 2002;4(3):152-162. Available from: https://sid.ir/paper/57083/en

IEEE: Copy

M. SHAHVERDI, A.A. HEJAZI, H.R. RAHIMIAN MASHHADI, and A. TORKAMANI, “DETERMINATION OF THE CRITICAL PERIOD FOR WEED CONTROL IN SUNFLOWER (HELIANTHUS ANNUUS CV. RECORD),” IRANIAN JOURNAL OF CROP SCIENCES, vol. 4, no. 3, pp. 152–162, 2002, [Online]. Available: https://sid.ir/paper/57083/en

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