Plant Productions

Cogongrass (Imperata cylindrica L. Beauv) Management in Sugarcane Fields of Subtropical Iran

Farkhondeh Eskandari; Batool Keramat; Yousef Filizadeh; Amir Aynehband

Volume 45, Issue 1 , May 2022, , Pages 123-132

https://doi.org/10.22055/ppd.2020.33905.1919

Abstract

IntroductionAmong all weeds, cogongrass (Imperata cylindrica L. Beauv) has been identified as a problematic weed in the sugarcane (Saccharum officinarum L.) fields of Iran for over ... Read More IntroductionAmong all weeds, cogongrass (Imperata cylindrica L. Beauv) has been identified as a problematic weed in the sugarcane (Saccharum officinarum L.) fields of Iran for over 20 years since 1996. Failure to control of cogongrass regrowth during spring develops it rapidly and, in turn, reduces the sugarcane yield in subtropical Iran. In effect, the identification of weak points in cogongrass phenology and frequency is deemed to help decision makers adopt effective controlling strategies in optimum time. Storage of carbohydrate reserves by plants is, in turn, the best mechanism for optimizing the timing of management strategies when reserves are at the lowest levels in storage organs. Glyphosate has been also widely used in Iran to control of weeds in the sugarcane fields. Currently, despite double spraying, the spring control of cogongrass is not satisfactory in the sugarcane fields in subtropical Iran. Materials and MethodsTwo studies were carried out in Salman Farsi Agro-Industrial Company in about 40 km south-west of the center of Khuzestan Province, Ahvaz, Iran, in 2017. In the first experiment, monthly (February–November) total nonstructural carbohydrate allocation patterns of cogongrass were evaluated to determine carbohydrate low points in the seasonal phenological cycle. To that end, glyphosate (00, 0.92, 1.84, 2.76 and 3.68 L a.i ha-1) was applied in April and June, 2017, in a 10×2 factorial design under randomized complete block designs with four replications. Data were analyzed using standard ANOVA procedures with the subsequent use of Least Significant Difference test (Little and Hills 1978( to separate means. Results and DiscussionThe occurrence of carbohydrate low points (CLPs) (88.69±13.15 mg g-1) was considered from May to August, CLP was found to have two important points with the potential control of cogongrass reported. The first and second points were in May (579 GDD) and August (2683GDD), respectively. The suppression of cogongrass (58-100%) was achieved with the three highest rates (1.84, 2.76 and 3.68 L a.i ha-1) in both application times, although substantial regrowth occurred in all plots by 5 months after the first treatment. Double spraying with a 60-day interval did not result in the effective control of such a troublesome weed in the sugarcane fields. Applying glyphosate two times in the spring and mid-summer (the end of CLP, 2683 GDD) was determined effective for the long-term control (>6 months) of cogongrass. The results suggest that glyphosate 1.84 L a.i ha-1 should be performed on cogongrass in the spring for improved control. ConclusionWe concluded that frequent spring spraying may be excluded to control of cogongrass in the sugarcane fields and only spraying should be made on twice the growth seasons. The first use of glyphosate in its minimum optimum dose (1.84 L a.i ha-1) is made on early spring. The second is sprayed in its maximum optimum dose (3.68 L a.i ha-1) at the midsummer, once the single-sprayed cogongrass gets appropriate leaf surface for transferring the herbicide.

Effect of the rate and split application of urea fertilizer on qualitative and quantitative yields of sugarcane ratoon

A. Koochekzadeh; G. Fathi; M.H. Gharineh; S.A. Siadat; S. Jafari; Kh. Alami Saeid

Volume 36, Issue 3 , December 2013, , Pages 119-129

Abstract

The influence of different rates and split application (AP) of Nitrogen (N) on qualitative and quantitative characteristics of first sugarcane ratoon (Saccharum officinarum L.) cultivar ... Read More

Effect of Integrated Weed Management Systems on Yield Quality and Quantity of Sugarcane in Khouzestan

A H; A A; H H

Volume 35, Issue 3 , December 2012, , Pages 55-68

Abstract

In order to evaluate the effect of integrated weed management on the yield quality and quantity of Sugarcane, variety CP69, a field experiment was conducted during 2009-2010 at the ... Read More

Crop Species Transportability of Sorghum Microsatellite Markers In Sugarcane and Maize

S K; F E

Volume 34, Issue 2 , February 2012, , Pages 27-38

Abstract

Simple sequence repeat (SSR) markers are valuable tools for many purposes, such as mapping, fingerprinting, and plant breeding. However, they are only available in some economically ... Read More

A Study of Genetic Diversity in Iran of Most Important Sugarcane Varieties Based on RAPD Molecular Marker

M B; B SH; SH M; S S

Volume 33, Issue 1 , September 2010, , Pages 75-86

Abstract

This study was accomplished to study genetic variation of 35 cultivars sugarcanes using RAPD marker. The aim was to determine the genetic variation level and relation in some commercial ... Read More

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Keywords = Sugarcane

Cogongrass (Imperata cylindrica L. Beauv) Management in Sugarcane Fields of Subtropical Iran

Abstract

Effect of the rate and split application of urea fertilizer on qualitative and quantitative yields of sugarcane ratoon

Abstract

Effect of Integrated Weed Management Systems on Yield Quality and Quantity of Sugarcane in Khouzestan

Abstract

Crop Species Transportability of Sorghum Microsatellite Markers In Sugarcane and Maize

Abstract

A Study of Genetic Diversity in Iran of Most Important Sugarcane Varieties Based on RAPD Molecular Marker

Abstract