Critical Period for Weed Control in Corn in the South-West of Iran

Ghanizadeh, Hossein; Lorzadeh, S H; Nazer, Ariannia

doi:10.3923/ajar.2010.80.86

Cited by 11 publications

(8 citation statements)

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“…Critical period for weed control depends on the density, competitiveness and emergence periodicity of the weed population (Evans et al, 2003;Bystro et al, 2012). In maize this period varied from 1 to 15-leaf stages of crop (Ghanizadeh et al, 2010). Thus, weed control in maize is absolutely necessary and is mainly based on chemical method.…”

Section: Introductionmentioning

confidence: 99%

Impact of tembotrione and flufenacet plus isoxaflutole application timings, rates, and adjuvant type on weeds and yield of maize

Idziak

Woźnica

2014

Chilean J. Agric. Res.

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Due to the steadily increasing cost of weed control in corn (Zea mays L.) and possible negative impact of chemicals on environment the demand for less and more efficient herbicide use is rising. Field studies were carried out in 2010 and 2011 in the Middle-West Poland in order to assessment the effective weed control. Treatments included herbicides tembotrione and flufenacet + isoxaflutole at recommended (88.0 and 36.0 + 7.5 g ha -1 ) and reduced rates (44 and 22 g ha -1 ; 19.2 + 4.0 or 9.6 + 2.0 g ha -1 ) with addition of methylated seed oil (MSO) and ammonium nitrate (AMN) adjuvants. Tembotrione was applied once at the stage of 3-5 maize leaves and flufenacet + isoxaflutole once at pre-emergence of maize. Mixtures of these herbicides were applied sequentially post-emergence, at 16-20-d intervals, after successive weed emergence. Results indicate that herbicide applied at reduced rates with adjuvants provided satisfactory weed control in maize. Application of reduced rates of tembotrione (44 and 22 g ha -1) and especially mixture of tembotrione with flufenacet + isoxaflutole and MSO + AMN adjuvants applied twice provided similar grain yield of maize as from treatments where tembotrione or flufenacet + isoxaflutole herbicides were applied only once at recommended rates (9.5, 9.7, and 10.0 t ha -1 , respectively).

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Section: Introductionmentioning

confidence: 99%

Impact of tembotrione and flufenacet plus isoxaflutole application timings, rates, and adjuvant type on weeds and yield of maize

Idziak

Woźnica

2014

Chilean J. Agric. Res.

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“…Corn (Zea mays L.) is one of the most popular crops in Iran and is cultivated often for both human and animal consumption (Ghanizadeh et al 2010). Weeds are one of the limiting factors for crop growth and development and cause a significant yield loss when not controlled (Keramati et al 2008).…”

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confidence: 99%

Effect of weed interference on Zea mays: Growth analysis

Ghanizadeh

Lorzadeh

Aryannia

2014

Weed Biology and Management

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In order to investigate the effect of weed competition on corn, growth trials were conducted in Shushtar, Iran, using a comparative growth analysis. In this study, two sets of treatments were imposed, based on the phenological stages of corn development, using a randomized complete block design with three replicates. The results showed that barnyardgrass and redroot pigweed were the most dominant weeds in these trials. Increasing the duration of weed interference reduced the corn leaf area index gradually. The reduction in the corn leaf area index led to a decline in the crop growth rate as a result of a reduction in the ability of corn to capture light and its photosynthetic ability. The total dry matter and relative growth rate of corn were decreased when the weeds were removed later as a result of a reduction in the leaf area index. According to these results, the leaf area index has a critical role in weed–crop competition.

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“…The weedy environment beyond 30 days and up to 45days after sowing was detrimental to maize growth and causes yield loss (Porwal, 2000). Ghanizadeh et al (2009) from Sushtar, Iran stated that critical period for weed control in maize was from 5-9 leaf stage (17-36 DAS). Anil kumar et al (2015) reported that the emergence of maize and weeds was simultaneous and the first 20-60 days was the most critical period of competition for the crop.…”

Section: Critical Period Of Crop-weed Competitionmentioning

confidence: 99%