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Assessment of Sugarcane Damage by Jackal and Rat in Sripur Area of Bangladesh

M. E. Haque
Bangladesh Agricultural Research Institute, Joydebpur. Gazipur.

S. Ahmad
Bangladesh Agricultural Research Institute, Joydebpur. Gazipur.

R. K. Pandit
Bangladesh Agricultural Research Institute,Joydebpur. Gazipur.

A. Karim
Bangladesh Agricultural Research Institute,Joydebpur. Gazipur.

J. E. Brooks
Bangladesh Agricultural Research Institute,Joydebpur. Gazipur.

Abstract/ Executive Summary:

Three species of rats. Rattus rattus, Bandicotu bengalensis and Nesokia indica and the jackal. Canis aureus. cause damage to sugarcane in Bangladesh. Farmers reported to the Vertebrate Pest Section, BARl, In late December. 1983. that they we are suffering heavy rat and jackal damage to their sugarcane plots in Sripuar area of Gazipur District. this survey was done in that area in late February at the time of sugarx ane harvest. Three methods of damage assessment were used to estimate jackal and rat damage to the sug arcane Jackals caused 24.4 damage and rats caused 7.5 damage on the 5 by 5 m sampled plots. The weight losses of sugarcane stalks damaged by jackal is and rats were 32 and 14.3. respectively. Trapping result, indicated that R. rattus was the major rat species present, while onIy a few B. bengalensis were founds. Damage to sugarcane in this area by jackals was far more severe and important than that by rat. There was no statistical difference between three damage assessment methods, estimating jackal damage but the differences were significant when measuring rat damage to sugarcane.

Keywords: Sugarcane, Damage, Jackal, Rat

Location: Joydebpur (Sripur) area.

Start Date:

End Date:

Program Area: Pest Management

Commodity: Sugarcane

Objectives:

1.To determine how much or per cent of sugarcane stalks were damaged by rats and jackals

2.To compare several different methods of damage assessment for accuracy and ease of use.

Methodology:

Damage assessments of the jackals and rats were carried out in the later part of February, just at the time of sugarcane harvest in the Sripur area, approximately 20 km north of the BARl campus Joydebpur. Three methods were compared for damage assessment : 1) cutting and examining all canes from 5 by 5 m plots in each field; 2) cutting and examining all canes in 2 by 2m plots in the same field, and 3) without cutting the canes, using a point -circle area method where all canes growing within 1.5 m radius of a randomly selected point were examined for damage. To establish the point -circle area, a 1.5 m length of cord was used, attaching it to a randomly selected cane in the survey area. On all sampled plots, total internodes for each examined cane stalk were recorded together with the number of internodes damaged by either jackals or rats. Five fields were examined for this survey. Ten samples from both the 5m x 5m and 2m x 2m plots were taken, and 21 samples of the 1.5 m point -circle radius were taken. Analysis of variance for unequal sample sizes were done using arcsin transformed values of per cent infestation data of jackals and rats. Both jackal and rat-damaged canes were weighed and compared in weight with an equal number of undamaged canes. Snap traps were set in 3 fields in January to capture rats for identification. These were run for 3 nights.

Source of Information: Bangladesh Journal of Sugarcane. Vol: 7, pp: 47-51, ISSN 1991-8925, July-1985

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Three methods of damage assessment were used to estimate jackal and rat damage to the sugarcane Jackals caused 24.4 damage and rats caused 7.5 damage on the 5 by 5 m sampled plots. The weight losses of sugarcane stalks damaged by jackal is and rats were 32 and 14.3 respectively. Trapping result, indicated that R. rattus was the major rat species present, while only a few B. bengalensis were founds. Damage to sugarcane in this area by jackals was far more severe and important than that by rat. There was no statistical difference between three damage assessment methods, estimating jackal damage but the differences were significant when measuring rat damage to sugarcane.

Knowledge Management: Journal