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Effect of Botanical Extract on Pest Control in Brinjal Field

M. A. K. Azad
Institute of Environmental Science, Rajshahi University, Rajshahi

M. N. Yesmin
Institute of Environmental Science, Rajshahi University, Rajshahi

M. S. Islam
Department of Crop Science and Technology, Rajshahi University, Rajshahi

Abstract/ Executive Summary:

An experiment was conducted to evaluate the effect of eight botanical extracts on pest control in brinjal field. Accordingly, water extracts of dried leaves of Khuksa (Ficus hispida), Chotra (Lantana sp.), Chirata (Swietia chrata), Neem (Azadiracta indica), Bael (Aegle marmelos), Holde-hurhuri (Cleomp viscosa) and Marigold (Targetes erecta) and seeds of Mahogany (Swietenia mahagoni) were prepared and sprayed in experimental brinjal field at Rajshahi University. Out of these botanicals, Khuksha leaves extract showed best performance against the pest attack compare to other extracts. Marigold leaf extract also showed good performance in the protection of brinjal plant from pest. The efficacy of Chotra, and Chirata leaf extracts was nearly same in brinjal plot against the pest attack. Neem leaf extracts showed moderate performance against pest. Mahogany seed extract showed lowest efficacy and hampered the normal plant growth and caused fruit rottening as well as reduced the yield of brinjal. Although Khuksha, Beal and Marigold leaf extracts were found effective against brinjal pests but a higher production was observed in the treatments of Neem and Chirata leaf extracts in experimental brinjal field.

Keywords: Brinjal, Production, Pest, Botanicals

Location: IES Research Field of Rajshahi University

Start Date: 00-10-2011

End Date: 00-02-2012

Program Area: Pest Management

Commodity: Extract (plant, seed)

Objectives:

To find out the low-cost and effective plant-based pesticides to protect the brinjal field from pest attack.

Methodology:

Experimental Plot Preparation: This experiment was conducted at IES Research Field of Rajshahi University from October, 2011 to February, 2012. First the grasses and weeds of experimental plot were removed and the land ploughed properly and several holes were made every 150 inches interval. In each hole, required amount of cow-dung and chemical fertilizer was applied. About 40-days old brinjal seedlings (locally called kanta begun) were purchased from Katakhali bazar and planted in each hole. The experimental plot was irrigated with tap water when required. Experimental Plot Design Randomized Complete Block Design (RCBD) was followed for this experiment. Nine (9) treatments (three replications in each treatment) were applied in this experiment. Of them eight are different kinds of botanical treatments. Preparation of Botanicals for Spray Plant leaves of Khuksa (Ficus hispida), Chotra (Lantana sp.), Chirata (Swietia chrata), Neem (Azadiracta indica), Bael (Aegle marmelos), Holde-hurhuri (Cleomp viscosa) and Marigold (Targetes erecta) and seeds of Mahogany (Swietenia mahagoni) were collected from Rajshahi region. Before grinding or cutting, the leaves and seeds were dried up in lab for 25-30 days. About 100 gm of leaf dusts or grinding seeds were dissolved in one litre of tap water in a plastic bucket and kept for three days. Then the botanical solution was filtered with plastic filter and preserved the filtrate in refrigerator until use. Spray and Monitoring The botanical solution was sprayed on brinjal experimental field twice a week with the help of a sprayer. The pest was monitored every day and damages were counted every 3-days in a week. The numbers of infested leaves were also recorded. Statistical Analysis The data was first input in Excel program and finally analyzed by ANOVA and DMRT using RCBD design.

Source of Information: J. Environ. Sci. & Natural Resources, 5(2): 173-176, 2012, ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Out of eight botanicals, Khuksha and Marigold leaves extract showed best performances, whereas Mahogany seed extract showed poor efficiency to protect the brinjal plant from pest attack. Mahogany seed extract hampered the normal plant growth and causes fruit rottening and high fruit loss. Although Khuksha, Bael and Marigold leaf extracts were found very effective against the brinjal pests but a higher production was found in the treatments of Neem and Chirata leaf extracts.

Knowledge Management: Journal