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Identification and Performance Assessment of Weeds Grown in Tossa Jute Growing Areas.

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

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

M. Mahbubul Islam
Director (Admn. & Finance)
Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

The experiment was conducted at Faridpur, Rangpur and Jessore in 2009. It was laid out in RCBD with three replications having three tossa jute varieties viz., O-9897, BJRI Tossa Pat-4 (O-72) and BJRI Tossa Pat-5 (O-795) were used as study materials. Two levels of weeding stage viz., 1st weeding at 20 days after sowing (DAS) and 2nd weeding at 50 DAS were also the treatment of experiment. Results showed that eleven weed species viz., Khude shama (Echinochloa colonum), Mutha (Cyperus rotundus), Basket grass (Panicum javanicum) Durba (Cynodon dactylon), Helencha (Jussiaea repens) Fuska Begun (Physalis heterophylla), Gitlaghas (Paspallum distichum), Boro dodhia (Euphorbia hirta), Suto Dodhia (Euphorbia microphilla) Nunia (Portulaca quadrifida) and Chapra (Eleusine indica) belonging to six families were found to infest the experimental crop. Of these species, 5 belonged to Gramineae, 2 Euphorbiaceae, 1 Solanaceae, 1 Amaranthaceae, 1 Portulacaceae and 1 Cyperaceae. Among them at Jessore was grown 10 type species but Mutha and Khude shama were densely infested, Faridpur 7 type where Mutha was highly infested and Rangpur 3 type major species of weeds and Chapra and Mutha were densely infested. Results also showed that at the time of 2nd weeding it was more infested than 1st weeding.

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

Location: Jute Research Regional station Faridpur, Rangpur and sub station Monirampur, Jessore.

Start Date: 01-03-2009

End Date: 31-12-2009

Program Area: Pest Management

Commodity: Mechanical weed management

Objectives:

1. To identify different type of weeds grown in tossa jute growing areas of Bangladesh

. 2. To optimize cost of production of jute, kenaf and mesta crops, fibre and seed through manipulation of agronomic practices viz., crop combination, land preparation, weeding, thinning, stage of harvest, fertilizer application etc.

Methodology:

The experiment was conducted at Faridpur (AEZ 12) and Rangpur (AEZ 2) and Jessore (AEZ 11) in 2009. It was laid out in RCBD with three replications having three tossa jute varieties viz., O-9897, BJRI Tossa Pat-4 (O-72) and BJRI Tossa Pat-5 (O-795) were used as study materials. Treatments were three levels of locations viz., Jessore, Faridpur and Rangpur, and two levels of weeding stage viz., 1st weeding at 20 days after sowing (DAS) and 2nd weeding at 50 DAS. Unit plot size were 4.0m x 2.5m. Space between plot to plot and around the field 1.0m and between replications 1.5m. were maintained. Seed was sown in line of 30 cm apart. Other standard cultural and intercultural practices were followed. The crop was sown on last week of March and harvested at field duration of 120 days in each location. Data of weed density was collected from each plot at 20 DAS as 1st weeding and 50 DAS as 2nd weeding by using 1m X 1m quadrant as per method. Quadrant was placed at three spots 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/sq.m. After counting weeds in each quadrant and completed washing species wise fresh weight was taken. Average weight of each weed species was expressed in g/sq.m.

Source of Information: Annual Research Report (Agriculture Research on Jute): 2009-10, Bangladesh Jute Research Institute

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 24000

Total Budget (Tk.) : 24000

Achievement/Findings:

Eleven weed species viz., Khude shama (Echinochloa colonum), Mutha (Cyperus rotundus), Basket grass (Panicum javanicum) Durba (Cynodon dactylon), Helencha (Jussiaea repens) Fuska Begun (Physalis heterophylla), Gitlaghas (Paspallum distichum), Boro dodhia (Euphorbia hirta), Suto Dodhia (Euphorbia microphilla) Nunia (Portulaca quadrifida) and Chapra (Eleusine indica) belonging to six families were found to infest the experimental crop. Of these species, 5 belonged to Gramineae, 2 Euphorbiaceae, 1 Solanaceae, 1 Amaranthaceae, 1 Portulacaceae and 1 Cyperaceae. Among them at Jessore (Khude shama, Mutha, Basket grass, Durba, Helencha, Fuska Begun, Gitlaghas, Boro dodhia, Suto Dodhia and Nunia) was grown 10 type species but Mutha and Khude shama were densely infested, Faridpur 7 type where Mutha was highly infested and Rangpur 3 type major species of weeds and Chapra and Mutha were densely infested. Results also showed that at the time of 2nd weeding it was more infested than 1st weeding.

Knowledge Management: Report/Proceedings