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Integrated Management of Cotton Aphid, Aphis Gossypii on Roof-planted Eggplant, Solanum Melongena

Md. Abdul Alim
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh.

AHM Shafiullah Habib
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh.

Habibun Naher
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh.

Md. Aminul Islam
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh.

Abstract/ Executive Summary:

Prevalence and integrated management of cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae) were studied on four varieties of roof planted eggplant (Solanum melongena L.). Along the sixteen weeks study period highest incidence of aphids (1959.17.17±172.44/plant) on eggplant variety of Blackboy were recorded at 16^th week (last week of February, 2013) and the lowest incidence (12.83±8.68/plant) was recorded on the eggplant variety Singnath at 13^th week (first week of February, 2013). The treatment having combination of 2g Neem seed kernel extract (NSKE) + ½gm detergent+100 ml water) was most effective followed by a treatment of 2g NSKE+100 ml water and 1g NSKE+100 ml water in reducing the rate of aphid infestation. Eggplant variety Green round showed comparatively higher resistance in all aspects (from leaf and fruit infestation) followed by variety Muktakeshi and Black boy.

Keywords: Aphis gossypii, Solanum melongena, Neem extract Rooftop garden

Location: Zoology Department, Jagannath University.

Start Date: 01-11-2012

End Date: 15-01-2014

Program Area: Variety and Species

Commodity: Vegetables, Cotton

Objectives:

To assess the incidence of cotton aphid, A gossypii on different varieties of eggplant (Solanum melongena L.) planted on the roof top.

Methodology:

The experiment was carried out at the rooftop garden of Zoology Department, Jagannath University (23°42′37″ N 90°24′40″E), Dhaka during November 1, 2012-February 26, 2013 and November 1, 2013-January 15, 2014. The experiment was laid out in a randomized complete block design (RCBD) with two replications. The experimental field was divided into three blocks each consisted of four varieties, namely- Variety 1 (Black boy), Variety 2 (Singnath), Variety 3 (Green round), and Variety 4 (Muktakeshi). Treatment-1: 1 gm neem seed kernel extracts (NSKE) + 1000 ml water, Treatment-2: 2 gm NSKE + 1000 ml water, Treatment-3: ½ gm detergent + 1000 ml water, Treatment-4: 2 gm NSKE + ½ gm detergent/100 ml water, Treatment-5, Control: Untreated control (an equal volume of water). There were three replications under each treatment and treatments were applied at three days interval. The experiments was conducted for a period of six weeks (01.11.2013 to15.01.2014). The sampling was done by counting the aphid number on different plants which were selected randomly. Counting started two weeks after transplanting. Aphid populations were monitored twice weekly and by leaf count method. The sampling was done at the same time (8:00 am - 11:00 am) in each collection. The average number of insects were counted each time and was computed for each treatment. Harvesting was done at an interval of 10 days. Percent fruit infestation at each harvest was calculated using the following formula: % fruit infestation by number= Number of infested fruits/ Number of total fruits × 100 %, fruit infestation by weight= Weight of infested fruits/Total weight of fruits × 100, % reduction in fruit infestation= % fruit infestation in control - % fruit infestation in treatment/% fruit infestation in control × 100. Humidity and temperature data were obtained from the meteorological department of Dhaka city. The data were analyzed using Microsoft office Excel program.

Source of Information: Bangladesh J. Zool. 43(1): 19-26, 2015, ISSN: 0304-9027 (Print), 2408-8455 (Online).

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Finally results concluded that neem based insecticides should be introduced as alternative to chemical insecticides; that reduced both leaf and fruit infestation and may meet the demand of vegetables for ever-increasing world’s population, can conserve the world’s beneficial organism and ensure the sound health of earth best creature.

Knowledge Management: Journal