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Loss Assessment in Potato Due to Cutworm, Agrotis Ipsilon (hufnagel) (lepidoptera : Noctuidae) and Its Control

A. K. DAS
Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Joydebpur

G. P. DAS
Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Joydebpur

M. K. ISLAM
Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Joydebpur

Abstract/ Executive Summary:

The damage of potato tubers due to cutworm, Agrotis ipsilon (Hufnagel) (Lepidoptera : Noctuidae) was recorded in the variety 'Lal Pakri' from the farmers' fields in the northern parts of Bangladesh. the highest tuber damage was found in Bogra district (20.60% by number and 22.08% by weight) while the lowest tuber damage was observed in Dinajpur district (8.17% by number and 7.30% by weight) which differed significantly. All the treatments viz. Dursban 20 EC at 1.5 kg a.i./ha, Furadan 5G at 2.0 kg a.i./ha, Lorsban 15G at 2.0 kg a.i./ha, Basudin 10G at 2.0 kg a.i/ha, Pyrifos 20 EC at 2.0 kg a.i./ha, mechanical control, neem oil at 2Lha and nimbecidine at 2 L/ha significantly reduced the cutworm infestations in tubers as compared with the untreated control

Keywords: Loss assessment, Cutworm, Agrotis ipsilon

Location: Northern Districts

Start Date: 01-02-2000

End Date: 31-03-2000

Program Area: Pest Management

Commodity: Insects

Objectives:

To assess the damage potential of cutworm under farmers' field conditions from several districts as well as to find out the performance of some synthetic chemical insecticides, botanical insecticides and the mechanic! method for controlling the cutworm.

Methodology:

To estimate the loss of potato tubers by the cutworm a survey work was conducted in eighteen upazilla under seven districts, such as Panchagarh, Thakurgaon, Dinajpur, Nilphamari, Rangpur, Bogra and Joypurhat during February-March, 2000. The potato variety considered was 'Lal Pakri' as this is the most widely cultivated variety in these districts. In each upazilla three locations (Farmers' fields) were randomly selected. Three unit samples were taken at random from each location. From each unit sample (50 kg) numbers of cutworm infested and undamaged tubers were counted. The weights of infested and undamaged tubers were also taken. These results were finally expressed as percentage.Tuber was harvested after 90 days of planting. Percentage of damaged tuber by number and weight and yield of undamaged tubers were recorded. Data were analyzed for different parameters separately following the analysis of variance (ANOVA). Means were separated by Duncan's Multiple Range Test (DMRT). The percent data were transformed to arcsine values prior to analysis.

Source of Information: Bangladesh J. Agril. Sci. 31(1): 65-69, January, 2004

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

All the treatments have shown significantly lower tuber damage as compared with the untreated control. The performance of Dursban, Furadan, Lorsban, Basudin and nimbecidine is statistically similar. Farmers are suggested to use insecticides against the cutworm as a last resort when the cutworm population is high. When the cutworm population is low, the mechanical control is useful. Furthermore, the use of mechanical control and neem based botanical pesticides is environmentally safe. Farmers need training to divert their attention gradually from conventional insecticides to eco-friendly methods of cutworm control.

Knowledge Management: Journal