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Effectiveness of Molasses Mixed Poison Bait for Controlling Rodents

Md. Shah Alam
Senior Scientific Officer
VPD,BARI,Gazipur

A. T.M. Hasanuzzaman
Senior Scientific Officer
VPD,BARI,Gazipur

Abstract/ Executive Summary:

This study was aimed to illustrate the efficacy of brodifacum rodenticides mixed with different concentration of molasse (20% and 30% molasses) The experiment was carried out in the laboratory and semi-natural field condition at VPD, BARI, Gazipur. Both the concentration of molasses led to an increase in the consumption rate of brodifacoum poison bait. The highest consumption (52.25%) was recorded in 30% molasses followed by 20% molasses (38.96) and no molasses (31.1%). Cent percent mortality was observed in all the concentration of molasses. In the semi natural field condition 90%, 80% and 60% mortality was observed in 30% molasses, 20% molasses and no molasses respectively.

Keywords: Effectiveness, molasses, poison bait, control, rodent,

Location: Vertebrate Pest Division. BARI, Gazipur

Start Date: 01-09-2004

End Date: 30-06-2005

Program Area: Pest Management

Commodity:

Objectives:

To find out the effectiveness of brodifacoum poison bait at different concentration of molasses mixed with wheat flour for rodent control.

Methodology:

The experiment was conducted at the laboratory and inside the rodent enclosure of Vertebrate Pest Division. BARI, Gazipur. Bandicota bengalensis were kept under the laboratory condition for at least 3 weeks for acclimatization before starting the experiment. All animals were starved for 6 hours before applying the treatment. Two concentration of molasses i e 20% and 30% were used for preparing plain bait with wheat flour. In the reference treatment no molasses (only wheat flour) was used. For each treatment 10 rats (5 male & 5 female) were used and they were individually cased. For all testing method 30 g of bait was provided in individual food cups and consumption rate was recorded to the nearest g on a daily basis for each rat to each food type presented. Daily food intake was determined by subtraction the spilled grain and the food remaining in the cups from the quantity originally given to each rat.10 acclimatized adult rat (5male, 5 female) was used for each treatment. Two concentrations of molasses i.e. 20% and 30 % were used for preparing poison bait and in the control treatment no molasses was used in the bait. For each treatment one kilogram of brodifacum (0.005 %) bait based on wheat four was prepared by following the standard method. Bait was offered to the rat for 24 hours. Sex, body weight were recorded.

Source of Information: VPD annual Report, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Twenty thousands

Total Budget (Tk.) : Twenty thousands

Achievement/Findings:

Food consumption test: The consumption rates of test foods were 52.29% (15.67g /rat/day), 38.96% (11.48 g/rat/day) and 31% (9.30 g/rat/day) for 30% molasses, 20% molasses and no molasses (wheat flour only) respectively. Food consumption studies using single cup indicated that the lesser bandicoot rat prefer 30% molasses + wheat flour than 20% molasses + wheat flour and only wheat flour. Efficacy test: The effectiveness of brodifacoum bait (0.005%) mixed with 20% and 30% molasses with wheat flour found to be toxic for the rat. 100% success was observed in all the concentration of molasses. The highest consumption was observed in 30% molasses concentration (18.17 g/rat/day) followed by 20% molasses concentration (16.55 g/rat/day). Days to death of rats were also significantly different among the treatments. Higher bait consumption consequently lower the days to death. Semi natural field test: Efficacy of molasses mixed brodifacoum poison bait in semi natural field condition is indicated that 9 rat in 30% molasses died with in 3–9 days. In 20% molasses concentration, 8 rat died from 5-12 days and in no molasses concentration rat died with in 9-19 days. The morality rate of this three treatment are 90 %, 80 % and 60 % in 30 % molasses, 20 % molasses and no molasses respectively. The present findings indicate that mortality and bait consumption can be increased by adding molasses with bait.

Knowledge Management: Report/Proceedings