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Efficacy of Malathion for Controlling Red Pumpkin Beetle, Aulacophora Foveicollis (lucas) in Cucurbitaceous Vegetables

M. K. Hasan
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. M. Uddin
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. A. Haque
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to study the efficacy of Malathion at different doses against red pumpkin beetle, Aulacophora foveicollis (Lucas) in Field Laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh. Three cucurbit hosts such as sweet gourd (Var. BARI sweet gourd1), bitter gourd (Var. Hybrid Nepali) and bottle gourd (Var. Kajla) were selected to conduct the research with three different doses viz. 0.4%, 0.5% and 0.6% of Malathion. Among the three doses of Malathion it was revealed that minimum number of leaf attack per plant, number of twig attack per plant, and average leaf area damage by red pumpkin beetle was found when the plants were treated with 0.5% and the maximum damage was observed in case of 0.4% Malathion application. The efficacy of the insecticide reduced with increasing time intervals of spraying. Considering the efficacy in reducing the leaf area damage at all the time intervals spraying 5% Malathion was found as the most effective in controlling red pumpkin beetle in three different cucurbit hosts. The efficacy of Malathion was similar on three different cucurbit hosts.

Keywords: Efficacy, Malathion, Control, Red pumpkin beetle, Cucurbit

Location: The Field and Laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh.

Start Date: 15-08-2010

End Date: 20-01-2011

Program Area: Pest Management

Commodity: Insecticide

Objectives:

To investigate the efficacy of Malathion for controlling red pumpkin beetle.

Methodology:

The research work was carried out in the Field and Laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh. The experiment was conducted from 15 August 2010 to 20 January 2011 to evaluate the efficacy of different doses of Malathion. Three cucurbitaceous vegetables such as sweet gourd (Var. BARI sweet gourd1), bitter gourd (Var. Hybrid Nepali), and bottle gourd (Var. Kajla) were selected to conduct the research work. The seedlings of the plants were developed in the earthen pots and the 15 days old seedlings were transplanted to the main field. The field experiment was laid out in a Randomized Complete Block Design (RCBD) with 3 replications. The whole experimental field was 22.65 m × 7.05 m which was divided into 3 equal blocks. Each block was again divided into 9 plots and single treatment was allotted to each plot randomly. Thus, there were 30 (10 × 3) plots in the experiment including the control. The size of a unit plot was 2.15 m × 2.15 m. Distance of 1 m between blocks and 0.5 m between the plots was maintained to facilitate different intercultural operations. Plants were developed providing fertilizers, irrigation and all kinds of intercultural operation as and when necessary.

To find out the effectiveness of Malathion on adult A. foveicollis three doses viz. 0.4%, 0.5%, and 0.6% were applied on the plants in the field for two times at 15 days interval. A control treatment was always maintained. Insecticide was applied with a Knapsack hand pressurized sprayer. Spraying was done at 4.30 p.m. to avoid bright sun and drift caused by strong wind. The efficacy of the insecticide was determined depending on the number of attacked leaf, twig per plant and average leaf area damage (mm²) at different time intervals. The infestation by adult beetle was recorded after 24 hrs, 48 hrs, 72 hrs, 5 days, and 7 days after insecticide spraying. Data were analyzed by using computer programme and the means were separated by LSD value.

Source of Information: Progress. Agric. 22(1 & 2): 11 – 18, 2011 ISSN 1017-8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Malathion is effective to control the red pumpkin beetle and the effective dose is 0.5. Even above this dose significant effect of this insecticide was not found. This result is similar with the following findings. Thapa and Neupane (1992) reported that among the various insecticidal sprays evaluated on water melon seedlings, synthetic pyrethroids (deltamethrin at 0.004%, cypermethrin at 0.012%, and fenvelerate at 0.01%) were effective in controlling the red pumpkin beetle (8.188- 96.88% mortality) for about a week. Khan and Jehangir (2000) conducted an experiment on the efficacy of sevin dust to control A. foveicollis in the muskmelon field and they reported that 2.0% concentration gave the best control of the pest followed by medium (1.0%) concentration. They also stated that high and medium concentrations were found nonsignificantly different in control of the pest.

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