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Species Identification, Density Evaluation and Green Weight of Weeds in Deshi Jute (corchorus Capsularis) Growing Areas of Bangladesh.

M. Shahadat Hossain
SSO (c.c.)
Crop Management Department, Agronomy Division,Bangladesh Jute Research Institute,Manik Mia Avenue, Dhaka-1207.

A.T.M. Morshed Alam
SSO
Crop Management Department, Agronomy Division,Bangladesh Jute Research Institute,Manik Mia Avenue, Dhaka-1207.

M. Mahbubul Islam
CSO (c.c.)
Agronomy Division, Bangladesh Jute Research Institute,Manik Mia Avenue, Dhaka-1207.

Jahangir Alam
SSO (c.c.)
JFS Division, Bangladesh Jute Research Institute,Manik Mia Avenue, Dhaka-1207.

Izaz Ahmed and M
PSO
Crop Management Department, Agronomy Division,Bangladesh Jute Research Institute,Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

The experiment was conducted at Manikganj, Kishoreganj and Comilla during 2009-11 to identify the weed population (wd. popⁿ.) and their green weight (grn. wt.) and to generate information. It was laid out in RCBD with 3 replications and jute variety CVL-1 was used. Treatments were 3 locations viz., Manikganj, Kishoreganj & Comilla, and 2 weeding stage viz., 1^st weeding (20 DAS) & 2^nd weeding (50 DAS). Results revealed that 17 different crop affected weed species of which 10 major viz., Cyperus rotundus, Echinochloa colonum, Digitaria sanguinalis, Cynodon dactylon, Physalis heterophylla, Paspallum distichum , Eleusine indica, Jussiaea repens, Euphorbia hirta, Euphorbia microphilla were observed more serious to the crop. There were 6 families of weed species found to infest the experimental plots. Among total weed vegetation, sedge 68%, grass 26% & broad leaf weed 6% on the basis of wd. popⁿ. (m^-2) & sedge 59%, grass 28% and the broad leaf weed 13% on the basis of weed grn. wt. (gm^-2). Cyperus rotundus was very seriously affected at Kishoreganj. Manikganj jute field was also infested by Cyperus rotundus. The experimental plots of Comilla were seriously infested by Echinochloa colonum.

Keywords: Jute weed density, weed species, Tossa jute.

Location: Jute Agricultural Experimental Station Manikganj, Jute Research Regional Station Kishoreganj and Comilla

Start Date: 01-03-2009

End Date: 31-10-2011

Program Area: Pest Management

Commodity: Jute

Objectives:

This study was undertaken to identify the major weed species and population associated with deshi jute under different agro-ecological zones of Bangladesh.

Methodology:

The experiment was conducted at Jute Agricultural Experimental Station, Manikganj (AEZ 7), Jute Research Regional Station, Kishoreganj (AEZ 9) Jute Research Regional Station, Comilla (AEZ 19) during 2009-11 with a view to identify the weeds in deshi jute field and generate the information about their population and green weight status at different jute growing areas. The experiment was laid out in RCBD with three replications. The jute variety CVL-1 was used as study material. The treatments were three locations viz., Manikganj (L₁) Kishoreganj (L₂) and Comilla (L₃) and two levels of weeding stage viz., 1^st weeding (W₁) at 20 days after sowing (DAS) and 2^nd weeding (W₂) at 50 DAS. Data on weed density was collected from each plot at 20 DAS as 1^st weeding and 50 DAS as 2^nd weeding of the jute plants by using 1m´1m quadrant as per method. The quadrant was placed in three spots at randomly in each unit plot. In each spot all weeds inside the quadrant were counted species wise and their average values were taken as the weed population m^-2. After counting the weeds in each quadrant and after completed the washing their species wise green weight was taken. Average weight of each weed species was expressed in gm^-2. The crops were harvested at field duration of 120 days in each location. Ten major species of weeds (Mutha, Khudesama, Anguli, Durba, Fuskabegun, Knotgrass/Gitlaghass, Chapra, Helencha, Borododhia and Sutododhia) population (m^-2) and green weight (gm^-2) had analyzed for the study. The mean difference among the treatments were adjudged by the New Duncan`s Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: Bangladesh Journal of Weed Science. 3 (1&2): 47-52.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 24000

Total Budget (Tk.) : 24000

Achievement/Findings:

Seventeen different crop affected weed species of which 10 major viz., Cyperus rotundus, Echinochloa colonum, Digitaria sanguinalis, Cynodon dactylon, Physalis heterophylla, Paspallum distichum , Eleusine indica, Jussiaea repens, Euphorbia hirta, Euphorbia microphilla were observed more serious to the crop. There were 6 families of weed species found to infest the experimental plots. Among total weed vegetation, sedge 68%, grass 26% & broad leaf weed 6% on the basis of wd. popⁿ. (m^-2) & sedge 59%, grass 28% and the broad leaf weed 13% on the basis of weed grn. wt. (gm^-2). Cyperus rotundus was very seriously affected at Kishoreganj. Manikganj jute field was also infested by Cyperus rotundus. The experimental plots of Comilla were seriously infested by Echinochloa colonum.

Knowledge Management: Journal