THE CRITICAL PERIOD OF WEED CONTROL IN TWO LATE AND MEDIUM MATURITY GRAIN MAIZE (ZEA MAYS L.) CULTIVARS

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

ASGHARI J.; CHERAGHI GH.R.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Crop Sciences Year:2003 | Volume:5 | Issue:4 Page(s): 285-301

Download Full-Text

Persian Verion

View:

974

Download:

Cites:

Information Journal Paper

Title

THE CRITICAL PERIOD OF WEED CONTROL IN TWO LATE AND MEDIUM MATURITY GRAIN MAIZE (ZEA MAYS L.) CULTIVARS

Author(s)

ASGHARI J. | CHERAGHI GH.R. | Issue Writer Certificate

Keywords

GDDQ3

CRITICAL PERIODQ3

LOGISTICQ4

GOMPERTZQ4

GRAIN MAIZEQ2

WEED COMPETITIONQ2

Abstract

To determine the CRITICAL PERIOD of WEED COMPETITION and adequate time for weed control an experiment was conducted with two factors including maize varieties (SC-704 and SC-604) and weeding times (12 times of hand weeding) in Kermanshah province in 1999 cropping season. The weeding times were divided into two sets; including weed interference util 0, 2, 5, 10 leaf stages, tasling and silking stages and weed removal at these stages. These two sets of data were analysed and LOGISTIC and GOMPERTZ equations were fitted, respectively. With a 5% yield reduction tolerance, SC-704 had a CRITICAL PERIOD of 5-8 leaves stages (26-37 days after emergence) for grain yield and a period of 4-12 leaves stages (23-47 DAE) for dry mass. In SC-604 the CRITICAL PERIODs for grain yield and dry mass were 3-9.5 leaves stages (20-41 DAE) and 2-13 leaves stages (17-51 DAE), respectively. Based on accumulated degree days (GDD), the CRITICAL PERIOD of WEED COMPETITION for grain yield and dry mass in SC-704 and SC-604 were 318-471 and 286-644 and 256-556 and 206-676 GDD, respectively. Wild Licorice (Glycyrrhiza lepidota), field Bindweed (Convulvulus arvensis) and Common purslane (Portulaca oleracea) were the dominant weeds in the early growing season, while Johnsongrass (Sorghum halepense) and Camelhom (Alhagi camelorum) were dominant at the end of the growing season. The number of weeds and its dry weight in weed free treatment decreased by 75 and 81% in comparison with control for 35 days after crop emergence. The whole season weed interference with maize reduced the yield and dry mass by 80 and 86% of weed free control.

Cites

No record.

References

Cite

APA: Copy

ASGHARI, J., & CHERAGHI, GH.R.. (2003). THE CRITICAL PERIOD OF WEED CONTROL IN TWO LATE AND MEDIUM MATURITY GRAIN MAIZE (ZEA MAYS L.) CULTIVARS. IRANIAN JOURNAL OF CROP SCIENCES, 5(4), 285-301. SID. https://sid.ir/paper/57185/en

Vancouver: Copy

ASGHARI J., CHERAGHI GH.R.. THE CRITICAL PERIOD OF WEED CONTROL IN TWO LATE AND MEDIUM MATURITY GRAIN MAIZE (ZEA MAYS L.) CULTIVARS. IRANIAN JOURNAL OF CROP SCIENCES[Internet]. 2003;5(4):285-301. Available from: https://sid.ir/paper/57185/en

IEEE: Copy

J. ASGHARI, and GH.R. CHERAGHI, “THE CRITICAL PERIOD OF WEED CONTROL IN TWO LATE AND MEDIUM MATURITY GRAIN MAIZE (ZEA MAYS L.) CULTIVARS,” IRANIAN JOURNAL OF CROP SCIENCES, vol. 5, no. 4, pp. 285–301, 2003, [Online]. Available: https://sid.ir/paper/57185/en

Related Journal Papers