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Incidence of Different Insect Pest and Diseases on Eggplant as Influenced by Various Organic Farming Components in Northern Bangladesh

M A Rahaman*
Principal Program Officer, Mennonite Central Committee (MCC) Bangladesh, 4/10, Iqbal Road, Mohammadpur, Block-A, Dhaka – 1207

M J Alam
Program Officer, Mennonite Central Committee (MCC) Bangladesh, 4/10, Iqbal Road, Mohammadpur, Block-A, Dhaka – 1207

Abstract/ Executive Summary:

This experiment was conducted at Birganj Upazilla under Dinajpur district during 2008-2009 to know the effects of different organic components on the incidence of insect pest and diseases of eggplant. There were six treatments viz. use of chemical fertilizers (@ recommended dose), poultry refuse (@ 80 g pit^-1), mustard oil cake (@ 80 g pit^-1), vermi-compost (@ 200 g pit^-1), cow-dung (@ 500 g pit^-1) and Trichoderma (@ 2 g pit^-1). Eggplant was selected as test crop. The plants were affected by Phomopsis, bacterial wilt and root knot diseases in different treatments, but statistically there were no significant differences. The highest plant height (cm), number of flower plant^-1 and yield was performed by the treatment use of Poultry Refuses (@ 80 g pit^-1). The highest number of branching plant^-1 was found in treatment use of Poultry Refuses (@ 80 g pit^-1) and use of vermicompost (@ 200 g pit^-1).

Keywords: Trichoderma, Vermicompost, Mustard oil cake, Poultry refuse

Location: Birganj upazilla under Dinajpur district

Start Date: 00-08-2008

End Date: 00-02-2009

Program Area: Pest Management

Commodity: Insects, Diseases

Objectives:

(i) to assess the effectiveness of different organic farming on the incidence of different insect pest and diseases on eggplant, and (ii) evaluate the effects of different organic farming on yield attributes and yield of eggplant.

Methodology:

The trial was conducted at the farmer’s field of Birganj upazilla under Dinajpur district during August 2008 to February 2009. Eggplant was selected as test crop with the variety BARI-5. Treatment plots were assigned to a randomized complete block design (RCBD). The treatments were (1) CF = Recommended chemical fertilizers ( @175 g N decimal^-1 as urea, 175 g P decimal^-1 as triple super phosphate (TSP), 116g K decimal-1 as muriate of potash (MOP), (2) PR = poultry refuse (80 g pit^-1), (3) MOC = mustard oil cake (80 g pit^-1), (4) VC = vermincompost (200 g pit^-1), (5) CD = cow-dung (500 g pit^-1) and (6) AT = Application of Trichoderma (2 g pit^-1). The experiment was laid out in a randomized complete block (RCB) design with six replications. The unit plot size was 3.7 × 2.8 m. Seedlings were prepared in a separate seed-bed of 3 × 1 m. As fertilizer dose mentioned in all treatments, (1) CF - TSP @ 100 g (2) PR @ 0.5 kg (3) MOC @ 0.5 kg (4) VC was @ 2.5 kg (5) CD @ 4 kg and (6) AT @ 10 g were added in each seed-bed. Hand sowing was done keeping 3 cm apart in each furrow at 2-3 cm in depth. After 10 days of sowing some ill health seedlings were thinned to maintain the desired density of plant population. The land was prepared with deep ploughs (four times) and during final land preparation all other common doses of chemical fertilizers at the rate of 175 g N decimal^-1 as urea, 175 g P decimal^-1 as triple super phosphate (TSP), 116 g K decimal^-1 as muriate of potash (MOP) were added to the soil. After that the main plot was divided to make it subplot (3.7 × 2.8 m). Between the plots 50 cm gap was maintained for giving proper irrigation and drainage facilities. Row to row distance was 60 cm and plant to plant distance was 60 cm. Number of plants in each unit plot was 40. Data were recorded on yield and different yield contributing characters, insect and disease status. Number of aphids was counted from the randomly selected plants. Number of infested shoots was counted form each plot separately. All data were tabulated and analyzed by using SPSS (version 11.5) data analyzing computer software and treatment means were compared following DMRT.

Source of Information: J. Sylhet Agril. Univ. 2(1):29-34, 2015 Research Article ISSN: 2308-1597

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest yield was obtained from the Treatment 2 (39.98+6.49 t ha^-1) where the lower yield was performed by the Treatment 6 (23.25 + 4.57 t ha^-1). Treatments 3, 4, 5 and 6 statistically performed insignificant variation among them. Second highest yield was performed by the Treatment 1 (33.04 ?3.03 t ha^-1) and statistically it showed a difference (p<0.01) with other treatments. In an experiment according to Bodabi and Van Damme (2003) nitrogen supplied at 200 kg N ha^-1 produced the highest number of flowers plant^-1 , fruits plant^-1 and yield (32.24 t ha^-1 ) over the untreated control plants. In this experiment the highest yield (39.98+6.49 t ha^-1 ) produced by the Treatment 2 (use of poultry refuses) was higher than the stated yield by Bodabi and Van Damme (2003).

Knowledge Management: Journal