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Development of Bio-rational Based Ipm Packages Against Thrips in Garlic

M.M. Hossain
Scientific Officer
Spices Research Centre, BARI, Shibganj, Bogra, Bangladesh

K.M. Khalequzzaman
Senior Scientific Officer
Spices Research Centre, BARI, Shibganj, Bogra, Bangladesh

M.S. Alam
Principal Scientific Officer
TCRSC, BARI, Seujgari, Bogra, Bangladesh

M.M. Hossain
Senior Scientific Officer
Spices Research Centre, BARI, Shibganj, Bogra, Bangladesh

M.T.R. Mondal
Scientific Officer
Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

Abstract/ Executive Summary:

The field experiment was conducted at SRC, Bogra during Rabi season of 2013-14 to evaluate the effectiveness of several bio-rational based IPM packages against thrips in garlic. The treatments were five bio-rational based IPM packages and one untreated control. Spraying of Spinosad (Tracer 45SC) @ 0.4ml/litre of water + White sticky trap @ 40traps/ha resulted the lowest thrips population (3.20, 3.11, 3.74 thrips/plant after 1^st, 2^nd and 3^rd treatment application respectively) with highest marginal benefit cost ratio (19.94). The highest percentage of thrips population (82.60) reduction (after 3^rd treatment application) over control and the highest garlic bulb yield (8.77 t/ha) was also obtained from Spinosad (Tracer 45SC) + White sticky trap treated plot. So, installation of sticky white trap along with spraying of Spinosad (Tracer 45SC) may be recommended for effective management of thrips in garlic.

Keywords: IPM package, Bio-control agents, Thrips, Yield, Garlic

Location: Spices Research Centre, BARI, Bogra

Start Date: 00-11-2013

End Date: 00-04-2014

Program Area: Pest Management

Commodity: IPM

Objectives:

To assess the efficacy of bio-rational based IPM packages against thrips infestation and on yield of garlic

Methodology:

The experiment was conducted at Spices Research Centre, BARI, Bogra during Rabi season of 2013-14. The experimental plot was prepared with five ploughings and cross ploughings followed by laddering to break the clods as well as level the soil. The weeds and stubbles of previous crops were collected and removed from the soil. The unit plot size was 3 m x 1.2 m. The experiment was laid out in a randomized complete block design (RCBD) with three replications. BARI Garlic-1 was used as test crop for this trial. The cloves were planted on 07 November 2013 maintaining 10 cm x 10 cm spacing. The treatments were T₁= Biopesticide-bioneem (Azadirachtin 3EC) @ 2 ml/litre of water; T₂= Spinosad (Tracer 45SC) @ 0.4ml/litre of water; T₃₌ White sticky trap @ 40 trap/ha; T₄= Spinosad (Tracer 45SC) @ 0.4ml/litre of water + White sticky trap @ 40 trap/ha; T₅= Biopesticide-bioneem (Azadirachtin 3EC) @ 2 ml/litre of water + White sticky trap @ 40 trap/ha and T₆=Untreated control. In addition to 5 t/ha of cow dung, the crop was fertilized with N₁₀₀ P₅₄ K₁₆₆ S₂₀ kg/ha. The entire quantity of cow dung, P, K, S and ½ of N was applied during land preparation. The rest of N was applied in to equal splits at 25 and 50 days after planting (DAP). Weeding was done at 25, 50 and 75 DAP. To control purple blotch disease the crop was sprayed three times with Rovral 50 WP @ 2g/l of water at 35, 45 and 55 DAP. Three irrigation were done at 10-20 days interval during vegetative growth stage. Irrigation was stopped before 20 days of crop maturity. The crop was harvested on 23 March 2014. Thrips population was counted at 10 days interval starting from the first appearance of thrips infestation. The first spray was applied when the thrips population was observed at economic threshold level (6-10 thrips per plant). Number of thrips (both nymphs and adults) was recorded after treatment application from 20 randomly selected plants in each plot by keeping a white paper below the plant and then shaking the plants with finger. Another data were recorded on plant height after 3^rd treatment application, bulb weight and bulb yield. The recorded data were analyzed and mean values were adjusted and separated by Duncan’s Multiple Range Test (DMRT). Percent thrips population reduction over untreated control was calculated using following formula:

Percent thrips population reduction over untreated control = (Mean value of control - Mean value of the treatment) ÷ Mean value of control x 100

Source of Information: Int. J. Sustain. Crop Prod. 9(3):10-14, (2014)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above study, it may be concluded that installation of sticky white trap along with spraying of Spinosad (Tracer 45SC) showed better performance against thrips control in garlic with higher yield and economic return.

Knowledge Management: Journal