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Evaluation of Some Management Options Against Brinjal (solanum Melongena L.) Shoot and Fruit Borer (leucinodes Orbonalis [guenee])

Sharmin Akter
Depts. of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M.Z. Alam
Depts. of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M.M. Rahman
Depts. of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

A.M. Akanda
Plant Pathology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

Abstract/ Executive Summary:

A field study was conducted to find out the effectiveness of five management options: i) Bacillus thuringiensis (Bt), ii) Tracer 45 SC (Spinosad), iii) Proclaim 5 SG (Emamectin benzoate), iv) mechanical control, and v) untreated control for suppressing brinjal shoot and fruit borer (BSFB) during-2012 at Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU). The treatments were arranged in a randomized complete block design with four replications. Results indicated that Tracer 45 SC performed the best in reducing 85.60% shoot infestation over control, which was followed by Proclaim 5 SG (76.62%), Bacillus thuringiensis (66.41%) and mechanical control (22.02%). The best performance of fruit infestation reduction over control by number and by weight was also obtained in Tracer 45 SC treated plots and reduced 88.80 and 89.46%, respectively. This was followed by Proclaim 5 SG (65.58 and 67.29%), Bacillus thuringiensis (52.63 and 54.28%) and mechanical control (31.88 and 19.04%). The highest yield of 11.20 t ha^-1 and highest benefit cost ratio of 5.32 were recorded in Tracer 45 SC treated plots.

Keywords: Brinjal shoot borer, Brinjal fruit borer, Microbials, Chemical control, Mechanical Control, Bacillus thuringiensis

Location: Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur

Start Date: 00-11-2011

End Date: 00-04-2012

Program Area: Pest Management

Commodity: Insects

Objectives:

The present studies were, therefore, conducted to develop environment-friendly approach for the control of BSFB by using microbials, chemical insecticide and mechanical control.

Methodology:

The experiment was conducted at the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur. The location of the study site is 24.09Â°N latitude and 90.26Â° E longitude with an elevation of 8.2 from sea level (Anon., 1989). Previously the land was under “Shal forest” and amended later for research purpose. The experimental plot is surrounded by forest trees in the north and east and different crops in the west and the south. Crops include wheat, bitter gourd and musk melon. The experiment was conducted during November 2011 to April 2012 to evaluate the effect of Bacillus thuringiensis (Bt), Tracer 45 SC (Spinosad), Proclaim 5 SG (Emamectin benzoate), mechanical control, and an untreated control with recommended dose viz., Bacillus thuringiensis 0.4g/l, Tracer 45 SC (Spinosad) 0.4 ml/l, Proclaim 5 SG (Emamectin benzoate) 1 g/l for the management of BSFB and its effects on yield. The experiment was laid out in RCB design with four replications. The whole field was divided into 4 blocks of equal size having space of 2 meters between blocks and 1 meter between plots. Each block was subdivided into 5 equal plots including one control plot. The unit plot size was 3m x 2m accommodating 10 pits per plot. The distance between rows was 1m and that of plants was 60 cm. A total of 200 seedlings were planted in 20 plots @ 10 seedlings per plot. The first application of insecticides was made after 8^th week of transplantation and subsequent applications in each treatment were made at twelve days intervals. Four liters of spray volumes were required to spray four plots at each spraying before fruiting stage while subsequent applications during fruiting required five liters each to ensure cover spray. Mechanical control was done manually at twelve days intervals only in mechanical control treatment plots. Infested shoots and fruits were clipped off by scissors and removed from the field and buried for killing the larvae. Urea, TSP, MP and cow dung were applied in the field @ 250 kg, 150 kg, 125 kg and 15 kg ha^-1 respectively as recommended by Rashid (1993). Other recommended agronomic practices were also followed. The effect of different treatments on BSFB infestation was evaluated by determining the level of infestation of shoots and fruits by BSFB and calculating the yield per hectare. Other relevant data e.g., number of infested and healthy shoots, infested and healthy fruits, weight of fruit per plot, fruit infestation by number and weight, marketable and infested yield, total yield and BCR were taken. Data were analyzed by using MSTAT-C software for analysis of variance (ANOVA). Mean separation was performed by using Duncan Multiple Range Test (DMRT) (Gomez and Gomez 1984).

Source of Information: The Agriculturists 15(1): 49-57 (2017)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the study, it could be concluded that Tracer 45 SC (Spinosad) is the most effective insecticide for suppressing brinjal shoot and fruit borer (BSFB) in the field to protect brinjal crop and ensured the highest healthy fruit yield per unit area in winter season. Proclaim 5 SG and Bt was moderately effective while mechanical control is least effective against BSFB. Tracer 45 SC was found as the most effective treatment for the management of BSFB successfully providing the highest marketable yield (11.20 t ha^-1) and the highest BCR (5.32).

Knowledge Management: Journal