Palatability and efficacy of bromadiolone rodenticide block bait previously exposed to environmental conditions (original) (raw)
Related papers
2000
Science for Conservation is a scientific monograph series presenting research funded by New Zealand Department of Conservation (DOC). Manuscripts are internally and externally peer-reviewed; resulting publications are considered part of the formal international scientific literature. Individual copies are printed, and are also available from the departmental website in pdf form. Titles are listed in our catalogue on the website, refer www.doc.govt.nz under Publications, then Science & technical.
Biotechnology in Animal Husbandry, 2011
The Norway rat and house mouse the most important rodent pest at farms eat and polullut the huge food quantity and carry a range of severe infectious deseases to humans and pets. Rodent control is undertaken only after its presence has been registered. Preparations for their control need to meet palatability requirements. Experiments were conducted in animal food blender facilities and pig farm (maternity and rooms with young and adult pigs) in Omoljica following the standard EPPO method. Palatability and efficacy of RB formulated baits (paste in special 10 g paper bags) containing 0.005% bromadiolone and 0.005% brodifacoum were tested against the house mouse and Norway rat . Baits in pelllete formulation were used as the standard. All the baits were placed in special boxes. Rodent abundance was evaluated based on the highest and the lowest daily baits consumption divided by the daily required of food amount, and a census method before and after treatment. Rodent presence was monito...
Germinated and non-germinated cereals (paddy, Oryza sativa; pearl millet, Pennisetum typhoides; and ragi, Eleusine coracana) and pulses (green gram, Phaseolus aureus; black gram, Phaseolus mungo; and Bengal gram, Cicer arietinum) were evaluated to determine their suitability as a bait base for zinc phosphide and bromadiolone for controlling Rattus rattus. Two-choice and multiple-choice experiments were conducted using 10 animals of mixed sex for each experiment to compare bait preference of germinated and non-germinated grains. The results of the two-choice tests revealed that both germinated cereals and pulses were preferred to non-germinated by the test animals. The differences between the quantities consumed were statistically significant (P < 0.01). The results of Duncan's post hoc multiple comparison tests of germinated grain consumption by R. rattus were categorized into three subsets. The first subset consisted of pearl millet, Bengal gram, ragi and paddy. The second and third subsets consisted of green gram and black gram, respectively. It is concluded that by considering the cost of all four grains (in the first subset) any one of the cheapest among them in the germinated form could be recommended or used as a bait base for any of the two rodenticides for the management of R. rattus. Based on these results, germinated paddy was chosen (as it is the cheapest among the grains) for the laboratory toxicity studies. The acute toxicity tests (2% zinc phosphide) resulted in 100% mortality of rats under both no-choice and two-choice (germinated paddy with poison versus plain non-germinated paddy bait) tests. A powder formulation of bromadiolone (0.005%)-treated bait yielded 100% mortality of rats in no-choice tests, but only 60% mortality in two-choice tests. These results suggest that the 2% zinc phosphide with germinated paddy as a bait base was preferred over a powder formulation of bromadiolone (0.005%). However, a field efficacy study is required before a final bait formulation recommendation is made.
Ecohealth, 2012
Sewers are historically considered the main reservoir for commensal rodents, posing threats to urban ecosystem health. Aboveground rodent signs are often assumed to give clues to high sewer infestation, which can chronically restock surface areas. Thus, current sewer-baiting programmes are mostly reactive, responding to increased surface infestation. Conversely, proactive sewer-baiting (regardless of infestation levels) is often disregarded because cost-effectiveness is not always addressed. We explored the extent to which the surface infestation is related to rodent feeding activity on sewer and surface baits by analysing a set of proactive bait records in Bologna city, Italy. Sewer bait intakes were significantly lower than surface ones, suggesting that proactive sewer-baiting is generally less effective. As surface infestation increased, probability of recording surface bait intake increased significantly but this was not reflected by increased sewer bait intake, suggesting that surface infestation is not always a reliable indicator of sewer infestation. This should discourage the use of reactive sewer-baiting as a routine strategy. Poison-based control programmes by themselves are scarcely predictable and strategically limited, and ideally they should be handled within an ecologically based integrated pest management approach for achieving satisfactory results.
This study was, thus aimed at knowing the bait consumption acceptance (crushed maize) of rodents with the addition of natural Materials, seeds powder of cumin (Cuminum cyminum); coriander (Coriander sativum); anise (Pimpinella anisum ) and yeast as attractants and powders of black pepper seed (Piper nigrum); jojoba seed (Simmondsia chinensis); oshar leaf, (Calotropis procera) and neem leaf (Azadirachta indica) as repellent under laboratory condition to reduce the rodent infestation crop. The results show that, the mean consumption of attractive baits was recorded, Yeast with crush maize (7.25 gm/rat) and coriander (2.35 gm/rat) are the most effective baits as compare with control treatment of (crush maize) only (0.9 gm/rat), for Rattus rattus frugivorus. But in Rattus rattus lexandrines, it was observed that the mean consumption was high in yeast bait with crush maize (7.35 gm/rat), and anise (3.63 gm) as compare with control (2gm/rat).In Arvicanthis niloticus the mean consumption was high in yeast bait (4.75 gm) as compared with the control bait (1.83gm/rat). Baits preference tests should be done periodically to find out the proper bait for rodenticide formulation and to overcome the shyness of rodent baits. The mean consumption of repellent bait was less in black pepper bait with crush maize (0.32.5 gm/rat), jejoba seed (1.15 gm) as compared with control one (10.83gm/rat) for R.r.frugivorus. In R.r.alexandrinus was observed that the consumption was less in black pepper bait (0.38 gm/rat), and oshar leaf (0.85 gm/rat) as compared with control (7.05 gm/rat). A. niloticus consumed scarce amount of black pepper bait (0.83 gm/rat) and leaf of oshar (1.58 gm/rat) as compared with control (7.9gm/rat) .Generally; these results may be satisfied in rodent control.
Environmental influence on urban rodent bait consumption
Journal of Pest …, 2010
Anticoagulant poisoning is a common rodent control method in urban areas, but rodents may exhibit versatile feeding behavioural habits in varying environmental conditions. This study has been conducted to determine those environmental factors that ...
Medical and Veterinary Entomology, 2001
Vector control in plague-infested areas requires a simultaneous killing of rodents and their¯eas. We investigated the ef®cacy of a combination of a systemic insecticide, ®pronil, in a rodenticide bait formulation under laboratory conditions. Four different concentrations of ®pronil (0.05%, 0.005%, 0.0005% with acetone as a solvent, and 0.05% with propylene glycol as a solvent) and two controls (solvents only) were combined with the rodenticide bait (crushed organically grown wheat with 0.005% bromadiolone). Each concentration was offered together with an untreated non-poisonous challenge bait to 10 singly caged Rattus rattus L., each with 100 rat¯eas Xenopsylla cheopis Rothschild (Siphonaptera: Pulicidae) in the nest. Treated bait consumption was relatively low and an unsatisfactory rat mortality of around 50% only was obtained in all tests. The palatability of the bait, however, was not affected by the ®pronil concentration. Even at the lowest ®pronil concentration, average¯ea mortality was still above 95%, and doses of more than 1 mg ®pronil per kg rat body weight gave a nearly complete kill of¯eas. Fipronil can be highly effective as a systemic insecticide to for¯ea control, provided that a more attractive bait base for roof rats is used.
Rodenticide efficacy of sodium selenite baits in laboratory conditions
Archives of Biological Sciences, 2014
We examined the acceptance and palatability of baits containing different contents of sodium selenite as a rodenticide, in Swiss mice under laboratory conditions. In a no-choice and choice feeding test, the animals were exposed to baits containing 0.1, 0.05, 0.025 and 0.0125% of sodium selenite. The total bait consumption by Swiss mice in the no-choice feeding test was highly negatively correlated, while total sodium selenite intake was medium-positively correlated to the sodium selenite content in the bait. In the same test, daily intakes significantly depended on the content of sodium selenite in the bait, while the exposure and associated interactions of contents of sodium selenite and exposure had no statistically significant impact. Baits with sodium selenite contents of 0.05 and 0.1% had the most lethal effects. The negative impact of the sodium selenite content on bait acceptance and palatability was confirmed in choice feeding tests. Baits containing 0.05 and 0.1% of sodium selenite displayed the biological potential to be used as a rodenticide. It is necessary to improve its insufficient acceptability and palatability by adding adequate additives to the bait. The results of this study should be verified in experiments with wild rodents.