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Study on the Effectiveness of Newly Designed Single and Multiple Capture Traps for Controlling Rodents

M. A. RAHMAN
Vertebrate Pest Division, BARI

M. A. ZAHID
Vertebrate Pest Division, BARI

M.S. ALAM
Vertebrate Pest Division, BARI

G. C. BISWAS
Vertebrate Pest Division, BARI

M. AHMED
Vertebrate Pest Division, BARI

Abstract/ Executive Summary:

Efficacy of newly designed multiple capture live trap and two single capture live bamboo and live metal box trap for controlling rat, were manufactured and evaluated inside the rat enclosure in Vertebrate Pest Division, BARI, Gazipur during the period of 2014 and 2015. All traps including live metal box trap performed well ranging 40% to 60% success.

Keywords: Live trap, Capture efficacy, Multiple capture live trap

Location: Vertebrate Pest Division, BARI, Gazipur

Start Date: 00-00-2014

End Date: 00-00-2015

Program Area: Pest Management

Commodity: Rats

Objectives:

The present study was conducted to develop a new multiple capture live trap and to evaluate its rodent capture efficacy

Methodology:

Trap preparation: One multiple capture live trap and two single capture live trap (one is modified and one is new) were designed and fabricated at the workshop of the Farm Machinery and Post-harvest Process Engineering Division and Vertebrate Pest Division of Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur during 2014-15.

Multiple Captures live Trap: The multiple capture live trap was fabricated with GI wire (2.6 mm). Weight of the live trap was 3 kg. The functional parts of the machine were (1) Frame; (2) Lower plate (3) Entrance cone and (4) Exit gate.

Frame: All components are supported by a Frame which was made by 12 numbers Aluminum GI wire (diameter 2.6 mm). Length, width and height of the frame were 35, 35 and 30 cm respectively.
Lower plate: The lower part of the trap was made by 12 numbers Aluminum GI wire (diameter 2.6 mm). Dimension of the plate was 30 x 30 cm. usually trap foods was placed on it.
Entrance cone: One entrance cones was placed on the upper portion of the frame vertically suspended from it. Length of the conical was 10 cm which was ended forming a 2cm diameter ring. The ring was made of with 15 numbers spring wire (diameter 2 mm).
Exit gate: There was an exit gate on one side wall (frame). It was used to catch and bring out the rats captured in the trap.

Trap mechanism: The trap mechanism was the main functional part of the multiple capture live trap. Rats could easily enter into the trap to take food placed in it but they were not able to return back. About 15 numbers of suspended spring wires were placed at the entrance gate. When the rats tried to enter into the trap, through its entrance cone the spring wires of entrance cone expanded due to its elasticity but after entering into the trap, the spring wires got back their normal position. Consequently, the rats captured into the trap could not come out from the trap because when the rats tried to come back through the entrance cone, they were faced by sharp and narrow end of the spring wires.

Single Captured Live Bamboo Trap:

The single captured live bamboo trap was made of bamboo and GI wire (diameter 2.6 mm). It was nothing but a piece of a big bamboo containing a one side opened internodes with a node. The functional parts of the trap were divided into two parts; (1) frame and (2) entrance gate.

Frame: It was made by a mature bamboo piece consist a node and opened internodes. First of all mature bamboo was cut by hand saw in such a way so that the frame of the trap contained a node and an internodes. Node was considered the back side of the trap. A hole was created (with the help of drill machine) on the as back side node. The hollow internode was actually acted as the frame. The length of the trap frame was 33 cm and diameter was 6.5 cm.
Entrance gate: On the open end of the frame, a W like (Double-u) shaped gate (made by GI wire) (diameter 2.6 mm) was set by making two hole on the bamboo. The entrance gate was very flexible and it was always kept lying approximately 45⁰ in the inner side of the lower side of the trap frame. Such characteristics of the gate kept it close all the time but its flexibility permitted the rats to enter into the trap whenever they wanted.

Trap mechanism: The trap mechanism is the main functional part of the single captured live bamboo trap. This type of bamboo live trap was set by fixing the open end of the trap into the active burrow opening. Because of setting the trap in such a way, active burrow opening was closed by the trap but some light of rays was entered through the hole of the back side node (Bamboo node) of the trap. And we know that rats are always curious about new things so when they saw the light, they became interested about the source of the light and following the source of the light they entered into the trap. After entering into the trap the entrance gate was closed due to its flexibility and consequently rat could not come out from the bamboo trap. In 2013-2014, the trapped rat able to cut the opposite end and easily get rid from the trap due to more hole/points to the opposite tunnel of the opening side. The number of holes was reduced for increasing the efficacy of single captured live bamboo trap. So, only 01 (one) hole was kept and gave optimum result in 2014-2015 experiment

Source of Information: Annual Research Report, Vertebrate Pest Division, BARI--2014-15

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Multiple Capture live Trap: The per cent trap success of newly designed multiple capture live was about 50%. Rats entered in to the trap successfully but they could not come out due to narrow space between the wires of entrance cone and they were also faced by the sharp end of the wires of the trap.

Live bamboo trap: The per cent trap success of newly designed single captured live bamboo trap was about 50% in a single hole to the opposite tunnel of the opening side. Rats could easily enter into the trap but could not come out from the trap because the entrance gate was closed automatically due to its flexibility

Live metal box trap: Rats could easily enter into the trap but could not come out from the trap because the entrance gate was closed automatically due to its flexibility. The per cent trap success of newly designed single captured live bamboo trap was about 60%. The USA made live trap cannot catch the house mouse at store and house but the newly designed small metal box trap could effectively catch house mouse, shrew and black rat (Rattus rattus) at the field, house and store.

Three newly designed live traps were evaluated in laboratory for their efficacy test. Of these live metal box performed better (60%) success than other traps.

Knowledge Management: Report/Proceedings