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Integrated Management of Leaf Curl Virus Disease of Chili Using Nylon Net, Chemicals, Bio-pesticides and Barrier Crop

M. R. HUMAUAN
RARS, Ishurdi, Pabna

Abstract/ Executive Summary:

The experiment was conducted at the Regional Agricultural Research Station, Ishurdi, Pabna during rabi season 2019-20 to find out the effective management practices for controlling leaf curl virus disease of chili. Seven treatments viz.T₁=Growing of nursery under Nylon net cover (60-80) mesh, T₂=Barrier crop (maize) was grown in three rows all around the main field 15 days before the transplanting of chili, T₃=Spray Neem oil (Azadiractin) @ 5ml/l, T₄=Spray Imitaf (Imidacloprid) @ 0.25ml/l, T₅= T₁ + T₂+ T₃, T₆= T₁ + T₂+ T₄, T₇= Control were used in this experiment. The incidence of virus infected chili plants ranged from 21.94% – 90.28% while the highest was recorded in the control plot and the lowest was found in treatment T₆which was statistically identical to treatment T₅. The highest yield (4.17 t/ha) was recorded in treatment T₆which statistically identical to treatment T₅ (3.91 t/ha) and the lowest (2.95 t/ha) was obtained in control plots.

Keywords: Chilli, Capsicum annuum, Leaf curl virus, Biopesticides

Location: Regional Agricultural Research Station, Ishurdi, Pabna

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Pest Management

Commodity: Virus, Pesticide

Objectives:

The study was undertaken to find out the the effective management practice against leaf curl virus disease of chili

Methodology:

The experiment was conducted at Regional Agricultural Research Station, Ishurdi, Pabna during rabi season 2019-20. The experimental land was well ploughed and properly leveled before bed preparation. Weeds and stubbles were removed from the field. Chili variety BARI Marich-3 was used in this experiment. The experiment was carried out following randomized complete block design (RCBD) with three replications. The unit plot size was 3.2 m X 2 m and plant spacing was 50 cm x 40 cm. Seeds were sown on November 01, 2019, and transplanted in the main field on December 09, 2019. Seven treatments viz.T₁=Growing of nursery under Nylon net cover (60-80) mesh, T₂=Barrier crop (maize) was grown in three rows all around the main field 15 days before the transplanting of chili, T₃=Spray Neem oil (Azadiractin) @ 5ml/l, T₄=Spray Imitaf (Imidacloprid) @ 0.25ml/l, T₅= T₁ + T₂+ T₃, T₆= T₁ + T₂+ T₄ and T₇= Control were used in this experiment. Spraying of Neem oil and Imitaf was done three times at 10 days intervals starting from the immediate appearance of disease symptoms. Recommended fertilizers were applied to raise a good crop. Intercultural operations were done in order to maintain the normal hygienic condition of the crop. The experiment was monitored regularly to observe the onset of the disease. Data were recorded on the incidence of virus infected plants, plant height, number of branches/plant, number of fruits/plant, the weight of fruits/plant (g) and green yield (t/ha). The data were analyzed statistically for tests of significance and mean compared following the Duncan’s Multiple Range Test (DMRT).

Source of Information: Annual Research Report 2019-20, Plant Pathology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above results, it may be concluded that growing of nursery under nylon net cover (60-80) mesh+ barrier crop (maize) was grown in three rows all around the main field 15 days before transplanting of chili+ spray Imitaf (Imidacloprid) @ 0.25ml/l or growing of nursery under nylon net cover (60-80) mesh+ barrier crop (maize) grown in three rows all around the main field 15 days before transplanting of chili+ Spray Neem oil (Azadiractin) @ 5ml/l was found effective in controlling leaf curl virus disease of chili with significant increase in yield

Knowledge Management: Report/Proceedings