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Effect of Different Doses of Herbicides in Controlling Common Weeds in Maize Field

Mohammad Sarfuddin Bhuiyan*
Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Rabiul Islam
Oilseed Research center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Md. Abdul Aziz
Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Md. Samsuzzaman
Integrated Agricultural Productivity Project, Regional Agricultural Research Station, Burirhat, Rangpur-5400, Bangladesh

Md. Abdul Mazed Miah
Integrated Agricultural Productivity Project, Regional Agricultural Research Station, Burirhat, Rangpur-5400, Bangladesh

Md. Mosiur Rahman
Pulses Research Sub-center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

A field trial was conducted at Agronomy Research Field of Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh during the period from November 2014 to April, 2015 to find out the optimum dose of herbicide to control weed in maize field. The herbicides were applied at spraying of Nirani @ 0.75 g/lit water (T1), spraying of Nirani @ 1.00 g/lit water (T2), spraying of Dipon @ 0.10 ml/lit water (T3), spraying of Dipon @ 0.12 ml/lit water (T4), two hand weeding at 25 and 50 DAE (Days After Emergence) (T5), and control (no spray or hand weeding) (T6). Results showed that number of weed/m², weed control efficiency, number of seed/cob, 1000 seeds weight and yield of maize were significantly influenced by different weed management methods. The highest weeds/m² ((51 and 151) were recorded in control plot at 25 and 50 DAE, respectively. The lowest weed/m2 (9.7 and 41) was recorded in T2 treatment. The highest WCE was found in T2 treatment (90.38 and 84.35%) at 25 and 50 DAE, respectively followed by T4 treatment. Considering maize yield, the highest no of seeds/cob (457.07), 1000 seeds weight (333 g) and yield (7.26 t/ha) was obtained from T5 treatment which was at par with T2 (6.56 t/ha) and T4 (6.13 t/ha). The lowest was found in T6 treatment. Although treatment T5 has given the highest yield but the highest net return (Tk. 96200/ha) and BCR (3.74) was obtained from the treatment T2 for its low cost of cultivation. The result revealed that spraying of herbicide Nirani @ 1.00 g/lit water would be the most effective to control weeds for obtaining higher yield and economic return for maize production.

Keywords: Zea mays, Weed flora, Herbicides dose, Economic analysis

Location: Agronomy Research Field of Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh during the period from November 2014 to April, 2015

Start Date: 00-11-2014

End Date: 00-04-2015

Program Area: Pest Management

Commodity: Herbicide, Maize

Objectives:

The present study was undertaken to find out the optimum dose of herbicide to control weed in a maize field.

Methodology:

Experimental site: A field trial was conducted at Agronomy research field of Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, during the period from November 2014 to April 2015. The soil was silty clay loam with pH 6.3 belonging to Agro Ecological Zone (AEZ) 28.

In this experiment BARI Hybrid Maize 9 used as a planting material. This is a very popular variety to the farmers for their higher yielding capacity. It is also resistant to disease and insect pest. Doses of herbicides The treatments were as follows: T1 = spraying of Nirani (Metribuzin) @ 0.75 g/lit water, T2 = spraying of Nirani (Metribuzin) @ 1.00 g/lit water, T3 = spraying of Dipon (Cyhalofop-butyl 5% + Fenoxaprop-P-ethyl 5%) @ 0.10 ml /lit water, T4 = spraying of Dipon Dipon (Cyhalofop-butyl 5% + Fenoxaprop-P-ethyl 5%) @ 0.12 ml/lit water, T5 = two hand weeding at 25 & 50 DAE (Days After Emergence), T6 = control (no spray or hand weeding). Cultivation procedure The trial was set up in randomized complete block design with three replications. The unit plot size 3m - 5m. The crop was fertilized with cowdung 5 t/ha, 250-55-110-40-5-1.5 kg ha-1 N-P-K-S-Zn-B in the form of Urea, TSP, MoP, Zypsum, ZnSO4 and Boric acid, respectively. One third of urea and all other fertilizers were applied during final land preparation. Seeds of maize (Var. BARI Hybrid maize 9) were sown on 23 November 2014. Remaining 2/3 urea were top-dressed in two equal splits at 30 and 60 DAE followed by irrigation. Since these are the pre emergence herbicides, so herbicide spraying was done before one week of sowing of maize seed. A light irrigation was given after sowing for uniform emergence of seeds. Data recorded Weed samples were collected using 50cm - 50cm quadrate, from randomly selected four places of each plot at 25 days interval in two times. Number and dry weight of weeds were recorded carefully. Weed control efficiency (WCE) was calculated according to using following formula:

WCE (%) = (A-B) x 100 where A = Dry weight of weeds in no weeding plots and B = Dry weight of weeds in treated plots. The crop was harvested on 20 April 2015.

Statistical analysis: Yield and yield contributing characters were recorded and analyzed statistically using STAR statistical tool for agricultural research, developed by International Rice Research Institute (IRRI) and mean separations were done by LSD test.

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The result revealed that spraying of herbicide (Nirani @ 1.00 g/lit water) would be the most effective to control weeds for obtaining higher yield and economic return for maize production in rabi season at Joydebpur region (AEZ 28) of Bangladesh.

Knowledge Management: Journal