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Management of Jute Leaf Mosaic Through Vector Control and Cultural Practices

M.M. Hoque
Quarantine Pathologist, Plant Quarantine Centre, DAE, Benaple, Jessore, Bangladesh.

K. M. Khalequzzaman
Plant Pathology Division, Agricultural Research Station, BARI, Bogra, Bangladesh.

Md. Abid Hussain
Plant Breeding Division, RARS, BARI, Ishurdi, Pabna, Bangladesh.

Md. Alauddin Khan
Spices Research Centre, BARI, Magura, Bangladesh.

M. Ashrafuzzaman
Department of Plant Pathology, BAU, Mymensingh, Bangladesh.

Abstract/ Executive Summary:

A field study was conducted to study some cultural treatments to find out an effective method, alternative to spraying of insecticide, for controlling vector to manage jute leaf mosaic disease. Five treatments viz. T₁ (Malathion 57 E.C), T₂ (field sanitation with rouging), T₃ (Hanging of polythene strips), T₄ (extra dose of nitrogen) and T₅ (control) were assigned randomly having four replications. T₂ and T₄ showed best performance on all the parameters including leaf mosaic of jute. However, the highest yield of raw jute 3091.5 kg ha^-1 and stick 5709.6 ha^-1was obtained from T₄ and the second highest 2541.6 kg ha^-1 of raw jute and 5039.1 kg ha^-1 of stick were obtained in T₂. A combination of collection and use of seeds from healthy plants, one insecticidal spray around 30 days after emergence (DAE), combined with field sanitation with rouging several times in the growth period and application of an extra booster dose of nitrogen at around 45 DAE may be prescribed to farmers of Mymensingh region of Bangladesh.

Keywords: Jute, Leaf mosaic, Vector, Control, Seed production

Location: Field laboratory, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh

Start Date: 00-03-2002

End Date: 00-10-2002

Program Area: Pest Management

Commodity: Jute

Objectives:

1. To find out an effective management method alternative.

2. To spraying of insecticide to control vector and performance of the cultural methods on yield.

Methodology:

The experiment was conducted in field laboratory, Department of Plant Pathology, Bangladesh Agricultural University (BAU), Mymensingh during March 2002 to October, 2002. The jute seeds of var. D-154 (Corchorus capsularis) were collected from the Central Experimental Station, Bangladesh Jute Research Institute (BJRI), Manikganj, Bangladesh. Cowdung (5,000 kg), Urea (110 kg), TSP (25 kg) and MP (40 kg) were applied to the experimental field as per recommended by BJRI, 2002. The experiment was laid out in a Randomized Completely Block Design (RCBD) with four replications. Five treatments were T₁=Malathion 57 EC, T₂=Field sanitation with rouging, T₃=Hanging of Polythene strips, T₄= Extra dose of nitrogen and T₅=Control. Malathion (2 ml/L) was applied after 15 days interval from the Days after sowing (15, 30, 45 and 60 DAE). Field sanitation with rouging operation of symptom bearing seedlings was done after 15 days interval according to the scheduled treatment (15, 30, 45 and 60 DAE). Hanging of blue colored shining polythene strips were used over the assigned plots with bamboo poles and rope. Extra dose nitrogen (Urea) was applied in splits after each 15 days interval (at 15, 30, 45, 60 DAE) @ 50.6 kg ha^-1 as side dressing only to the assigned plots. The control plots were exposed to natural conditions without hindrance. The incidence of mosaic were recorded three times at 30 DAE, 45 DAE and 60 DAE. The incidence of leaf mosaic was calculated as follows :

% Mosaic expressing plants= (Number of infected plants in each plot/Total number of plants in each plot) x 100

Number of white flies per plant at 15 days interval before the application of insecticides and rouging operation were measured with the help of a plastic Beljar. The visiting white fly insects were also counted. Ten healthy and 10 diseased plants were selected at random from each unit plot for the collection of data in following parameters Plant height (cm), Base diameter (cm), Green weight (g), Leaf weight (g), Fibre weight dry (g plant^-1), Bulk weight of dried capsules (g plant^-1), No. of capsules per plant, 1000 seed weight (g). The mean values were compared by Duncan’s Multiple Range Test (DMRT) which was also done with the help of a computer.

Source of Information: Asian Journal of Plant Sciences, 2 (11): 826-830, 2003; ISSN 1682-3974

Article Link (Online Journal): http://scialert.net/fulltext/?doi=ajps.2003.826.830&org=11

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the treatments used, the treatment T₄ (nitrogen) and T₂(field sanitation with rouging) yielded the highest number of capsules per plant, highest bulk weight of dried capsules and highest 1000 seed weight in the healthy plants. The symptom bearing plants also were found to be similarly influenced. However, the other treatments like spraying Malathion 57 EC (T₁), and hanging of polythene strips over the plants (T₃) have shown significant differences compared to control (T₅) treatment, when seed production in healthy plants were considered. As leaf mosaic disease of jute is different from diseases causes by fungi, bacteria and nematodes, curative measures are very difficult to control the leaf mosaic disease of jute. Extra dose nitrogen and field sanitation with rouging may play a vital role in managing the leaf mosaic disease.

Knowledge Management: Journal