Control of Imperata cylindrica (L.) Raeuschel (speargrass) with nicosulfuron and its effects on the growth, grain yield and food components of maize

Lum, A. Fontem; Chikoye, David; Adesiyan, S. O.

doi:10.1016/j.cropro.2004.06.006

Cited by 16 publications

(11 citation statements)

References 14 publications

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“…This is also confirmed by the higher number of weed species in some treatments at harvest than at 8 WAP. To control these weeds effectively, a postemergence herbicide, selective for maize, such as nicosulfuron may be recommended to control weeds that are poorly controlled by or escape the preemergence herbicide treatment (Lum et al 2005a(Lum et al , 2005b. Maize grain yield in most plots with herbicide was better than that in the unweeded treatment possibly due to good weed control because the weed density and biomass in these plots were lower than in the unweeded control.…”

Section: Discussionmentioning

confidence: 95%

Evaluation of Lumax® for preemergence weed control in maize in Nigeria

Chikoye

Lum

Ekeleme

et al. 2009

International Journal of Pest Management

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The efficacy of various herbicides against weeds of maize was studied in field trials at Ibadan, Nigeria in 2003 and 2004. The formulations were atrazine (Gesaprim 1 90 WDG at 3.5 kg a.i. ha 71 and Rhonazine 1 80 WP at 3.0 kg a.i. ha 71 ), a mixture of atrazine and metolachlor (Primextra 1 Gold TM 660 SC at 4.0 kg a.i. ha 71 and Primextra 1 500 FW at 2.5 kg a.i. ha 71 ), and a mixture of mesotrione, S-metolachlor and atrazine (Lumax 1 at five rates: 1.88-2.96 kg a.i. ha 71 ). Unweeded and hoe-weeded treatments were controls. Lumax 1 at all rates, Rhonazine 1 at 3.0 kg a.i. ha 71 , and Primextra 1 at 2.5 kg a.i. ha 71 controlled sedges, Commelina benghalensis, and Pueraria phaseoloides as effectively as the weeded control (95-100%). Weed density and biomass were significantly reduced and maize yield increased by 12-22%. The highest yield was in treatments with 2.15 7 2.96 kg a.i. ha 71 of Lumax 1 and 3.5 kg a.i. ha 71 of Gesaprim 1 , and the weeded control. Lumax 1 is more effective for weed control at lower rates than the previously used formulations.

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Section: Discussionmentioning

confidence: 95%

Evaluation of Lumax® for preemergence weed control in maize in Nigeria

Chikoye

Lum

Ekeleme

et al. 2009

International Journal of Pest Management

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“…For example, the relation between number of seeds per plant and growth rate was linear in soybean, reflecting reproductive plasticity, but curvilinear in corn and sunflower, reflecting morphogenetic restrictions to generate reproductive sinks (deposits) (Vega et al, 2001). Weeds decrease many physiological parameters in relation to corn growth (Cathcart & Swanton, 2004;Lum et al, 2005) and grain yield (Lum et al, 2005). No papers were found in the consulted literature on the relation between corn green ear growth and yield.…”

Section: Introductionmentioning

confidence: 98%

“…Many plant growth studies have been conducted in several crops, including corn. Corn growth evaluations have been carried out for parameters such as planting density (Sangoi et al, 2005), fertilizers (Wu et al, 2005), and competition with weeds (Lum et al, 2005;Carvalho et al, 2007). Despite being labor-intensive, growth studies provide explanations on aspects related to yield.…”

Section: Introductionmentioning

confidence: 99%

Growth and yield of corn grain and green ear in competition with weeds

et al. 2009

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Studies on plant growth are interesting because they provide explanations for the factors that influence yield in various crops. The objective of this work was to evaluate growth and yield in corn cultivar AG1051, when in competition with weeds. Cultivar AG 1051 was submitted to two groups of treatments: weed control, and sampling periods for dry biomass evaluation. The weed control treatments consisted of hoeing (two hoeings performed at 20 and 40 days after sowing) and no hoeing. Sampling periods consisted of collecting the above-ground part and roots of corn every fifteen days, until 105 days after sowing (DAS); the first sampling was performed 30 DAS. A completely randomized block design with ten replicates was used. For the characteristics evaluated in a single season, statistical analyses were carried out as a random block experiment. For the characteristics evaluated in several periods, statistical analyses were carried out as random blocks with split-plots (weed control assigned to plots). Fourteen weed species, unevenly distributed throughout the experimental area, were the most important. The growth observed for the above-ground part and root system of corn was 30% smaller in the non-hoed plots, compared to the hoed plots. Lack of weed control increased dry matter of the above-ground part of the weeds and reduced the number of unhusked and husked marketable green ears by 23% and 49%, respectively. Grain yield reduction caused by lack of weed control reached 38%.

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“…The reduction in yield due to weed resulted from competition for light, water, nutrition and other potential yield limiting factors [1]. Early weed infestation reduced maize leave area [2], reduce photosynthesis [3] and impact negatively on green ear yield and grain yield by 60% and 80 -90% respectively [4].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Herbicides for Pre-Emergence Weed Control in Maize (Zea mays L.) in Derived Savanna of Nigeria

Aluko

2019

JEAI

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Aims: To evaluate and compare the efficiency of candidate herbicides and increase the latitude of herbicides for pre-emergence weed control in maize. Study Design: Randomized Complete Block Design, with three replicates was used in the study. Place and Duration of the Study: Candidate herbicides were obtained Rainbow Nig. Limited for evaluation. The study was carried out between June – September, 2014 and 2015 at Ibadan (0.7.38N; 003.84E) and Ilora (07.81N; 003.82E) research stations of the Institute of Agricultural Research and Training, Obafemi Awolowo University, Ibadan. Methodology: Weed flora composition was taken with 1sqm quadrat placed randomly before land preparation. Acetochlor 500 g/L, Acetochlor 900 g/L, Metholachlor 720 g and Ametryn 80 WP were applied randomly at three rates of active ingredient (a.i) at maize sowing, while Atrazine (reference), weed-free and weedy check were the control. Agronomic and weed data were taken, analysed and means separated using Duncans Multiple Range Test (DMRT) at p≤ 0.05. Results: Result showed that weed flora composition before land preparation was dominated by annual weeds {broadleaves (80%) and grass (20%)}. At 6 weeks after sowing (WAS), weed flora composition comprised of 8% spiderwort, 8% sedge, 25% grass weeds and 59% broadleaf weed species. Weed flora dynamics after treatments application might have been influenced by types of herbicides, herbicidal activities and previous cultural practices. Herbicides application resultantly increased plant height (50%) and grain yield (46 - 60%) relative to plant height in weedy check at both locations. These might have accrued from minimal weed interference hence, high weed control efficiency (WCE) recorded in herbicides applied (WCE ≥80%) and significant reduction in cumulative weed dry matter of about 80%. Conclusion: Herbicides applied significantly reduced weed growth and enhanced maize grain yield. Notwithstanding, investigation of the benefit cost ratio and the environmental impact assessment of herbicides applied are imperative for sustainability of maize production and agro-ecology.

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Control of Imperata cylindrica (L.) Raeuschel (speargrass) with nicosulfuron and its effects on the growth, grain yield and food components of maize

Cited by 16 publications

References 14 publications

Evaluation of Lumax® for preemergence weed control in maize in Nigeria

Evaluation of Lumax® for preemergence weed control in maize in Nigeria

Growth and yield of corn grain and green ear in competition with weeds

Comparative Study of Herbicides for Pre-Emergence Weed Control in Maize (Zea mays L.) in Derived Savanna of Nigeria

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