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Optimization of Herbicide Teana 9 Ec Dose for Controlling Weeds in Brinjal

S.K.Paul
Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur - 1701, Bangladesh

S.Kundu
Planning and Evaluation Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh.

S.K.Roy
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

S.Mazumder
Sher - e - Bangla Nagar Adorsha Mohila College, Dhaka - 1207, Bangladesh

T.A.Mujahidi
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at th eresearch field of Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during the rabi season of 2013-2014 to find out the optimum dose of herbicide (Teana 9 EC) to control weeds in brinjal field for getting higher yield. Six treatments , viz.: (i) Teana 9 EC @ 750 ml ha^-1 spraying on 15 DAS and 45 DAS, (ii) Teana 9EC @1000 ml ha^-1 spraying on 15 DAS and 45 DAS, (iii) Teana 9EC @ 1250 ml ha^-1 spraying on 15 DAS and 45 DAS, (iv) Teana 9EC @ 1500 ml ha^-1 spraying on 15 DAS and 45 DAS, (v) two hand weddings , and (vi) no weeding (control) were used in the experiment. Among the weed species, Bathua (Chenopdium album), Durba (Cynodon dactylon), Anguli (Digitaria sanguinalis), Helencha (Jussiaea repens), Hatishur (Heliotropium indicum), Shama (Echinochola crusgalli), Swetlomy (Gnaphalium japonicum), Mutha (Cyperus rotundus), Shaknote (Amaranthus viridis), Gaicha (Paspalum commersonii), Chapra (Eleusine indica), Bon Masur (Vicia sativa) were found dominant in wheat field. The result show ed that the highest dry weight of weeds at 30 and 60 DAS were 12.24 and 24.12 gm^-2 in control plot , where as the lowest weed dry weight was observed in two hand weedings . The maximum weed control efficiency over control both at 30 and 60 DAS were 79.41 and 74.32% , respectively in the treatment with two hand weedings . The highest number of fruit s plant^-1, single fruit weight (g), fruit length (cm) and yield (t ha^-1) w as found in the treatment having two hand weeding s and the lowest in no weeding (control). Though the weed control efficiency (WCE) was the highest in the treatment with two hand weedings due to higher labor cost but the maximum benefit cost ratio was the highest when Teana 9EC @ 1500 ml/ha was sprayed two times on 15 and 45 DAS .

Keywords: Herbicide, Weed management, Brinjal

Location: Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Chemical weed management, Brinjal

Objectives:

To determine the optimum doses of herbicide (Teana 9EC) on weed control and subsequent growth and yield of brinjal.

Methodology:

The experiment was conducte d at the Agronomy research field of Bangladesh Agricultural Research Institute, Gazipur during the period from November 2013 to May 2014. The land was medium high and the soil was clay loam in texture. Six treatments viz., (i) Teana 9EC @ 750 ml ha^-1 spray ing at 15 DAS (days after sowing) DAS and 45 DAS, (ii) Teana 9EC @ 1000 ml ha^-1 spraying at 15 DAS and 45 DAS, (iii) Teana 9EC @ 1250 ml ha^-1 spraying at 15 DAS and 45 DAS, (iv) Teana 9EC @ 1500 ml ha^-1 spraying at 15 DAS and 45 DAS, (v) Two hand weeding s and (vi) No weeding were in the study. The unit plot size was 3m x 4m. The brinjal plant was transplanted on 26 November 2013. The brinjal field was fertilized with 80 - 60 - 40 - 20 kg N - P₂O₅ - K₂O - S ha^-1. Three ir rigations were given at 21, 55 and 75 DAS. Brinjal (cv. BARI Begun 10) seedlings were transplanted maintaining 75cm x 60 cm spacing . Herbicides were sprayed with a Knapsack sprayer as per treatment and all other operations were done as and when required. Weed samples were collected at 30 and 60 DAS. Data on yield components were taken and analyzed statistically using MSTAT - C program. The Relative Density (RD) and weed control Efficiency (WEC) were calculated by the following formula.

Relative Density (RD)= (No. of specific weed species/Total no. of weed)X 100

Weed Control Efficiency (WEC)= {(Dry wt. of control plot - Dry wt. of specific plot)/ Dry wt. of control plot)} X 100

Source of Information: Bangladesh Agronomy Journal, 2015 , 18 (1): 113-119

Article Link (Online Journal): http://www.banglajol.info/index.php/BAJ/article/view/25578/17151

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the above findings it may be concluded that Teana 9EC herbicide could be effectively control weeds of brinjal. Though the weed control efficiency (WCE) was the maximum in the treatment with two hand weedings but involved higher labor cost As such, the maximum benefit cost ratio was obtained from herbicides Teana 9EC @ 1500 ml/ha sprayed two times as on 15 and 45 DAS.

Knowledge Management: Journal