DETERMINATION OF THE CRITICAL PERIOD OF WEED CONTROL IN COTTON FIELDS (GOSSYPIUM HIRSUTUM L.)

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SALIMI H.; ATRI A.R.; RAHIMIAN MASHHADI H.

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Journal: Applied Entomology and Phytopathology Year:2006 | Volume:74 | Issue:1 (81) Page(s): 47-64

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Title

DETERMINATION OF THE CRITICAL PERIOD OF WEED CONTROL IN COTTON FIELDS (GOSSYPIUM HIRSUTUM L.)

Author(s)

SALIMI H. | ATRI A.R. | RAHIMIAN MASHHADI H. | Issue Writer Certificate

Keywords

COTTONQ3

WEED CONTROLQ3

CRITICAL PERIODQ3

GAMPERTZ AND LOGESTIC EQUATIONSQ3

Abstract

In order to determine the CRITICAL PERIOD of WEED CONTROL in COTTON, an experiment was carried out at Varamin Research Center during years 2000-2001. The experiment was conducted in randomized complete block design with 14 treatments and 4 replications, applied in two series. In the first series, weeds competed with COTTON at different phonological stages of COTTON (production of I and 5th true leaf stage, I, 3 and 5th reproductive branches and production of brown flower) and during the growing period as check treatment. In the second series, weeds were controlled as above-mentioned stages and during the growing period as check treatment. Results showed that the height of COTTON plant, number and length of branches, number of bolls and COTTON yield were affected by weed competition. The CRITICAL PERIOD of WEED CONTROL began from production of the first reproductive branch and continued up to production of brown flower on COTTON plants in the first year of experiment. The CRITICAL PERIOD began sooner due to drought stress in second year and started when the 5th leaves appeared. Amaranthus retroflexus L., A. viridis L., A. blitoides S.Watson, Portulaca oleracea L., Echinochloa crus-galli (L.) P.Beauv., Cyperus rotundus L., Sorghum halepense (L.) Pers were the most dominant weeds in experimental location.

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APA: Copy

SALIMI, H., ATRI, A.R., & RAHIMIAN MASHHADI, H.. (2006). DETERMINATION OF THE CRITICAL PERIOD OF WEED CONTROL IN COTTON FIELDS (GOSSYPIUM HIRSUTUM L.). APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY, 74(1 (81)), 47-64. SID. https://sid.ir/paper/13149/en

Vancouver: Copy

SALIMI H., ATRI A.R., RAHIMIAN MASHHADI H.. DETERMINATION OF THE CRITICAL PERIOD OF WEED CONTROL IN COTTON FIELDS (GOSSYPIUM HIRSUTUM L.). APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY[Internet]. 2006;74(1 (81)):47-64. Available from: https://sid.ir/paper/13149/en

IEEE: Copy

H. SALIMI, A.R. ATRI, and H. RAHIMIAN MASHHADI, “DETERMINATION OF THE CRITICAL PERIOD OF WEED CONTROL IN COTTON FIELDS (GOSSYPIUM HIRSUTUM L.),” APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY, vol. 74, no. 1 (81), pp. 47–64, 2006, [Online]. Available: https://sid.ir/paper/13149/en

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