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Effects of background food on alternative grain uptake and zinc phosphide efficacy in wild house mice
Pest management science, 2022-03, Vol.78 (3), p.1090-1098
Henry, Steve
Brown, Peter R
Van de Weyer, Nikki
Robinson, Freya
Hinds, Lyn A
2022
Details
Autor(en) / Beteiligte
Henry, Steve
Brown, Peter R
Van de Weyer, Nikki
Robinson, Freya
Hinds, Lyn A
Titel
Effects of background food on alternative grain uptake and zinc phosphide efficacy in wild house mice
Ist Teil von
Pest management science, 2022-03, Vol.78 (3), p.1090-1098
Ort / Verlag
Chichester, UK: John Wiley & Sons, Ltd
Erscheinungsjahr
2022
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
BACKGROUND House mice (Mus musculus) cause significant, ongoing losses to grain crops in Australia, particularly during mouse plagues. Zinc phosphide (ZnP) coated grain is used for control, but with variable success. In a laboratory setting, we tested if mice would (i) switch from consumption of one grain type to another when presented with an alternative and (ii) consume ZnP‐treated grains when presented as a choice with a different grain. RESULTS Mice readily switched from their background grain to an alternative grain, preferring cereals (wheat or barley) over lentils. Mice readily consumed ZnP‐coated barley grains. Their mortality rate was significantly higher (86%, n = 30) in the presence of a less‐favoured grain (lentils) compared to their mortality rate (47%, n = 29; 53%, n = 30) in the presence of a more‐favoured grain (wheat and barley, respectively). Mice died between 4 and 112 h (median = 18 h) after consuming one or more toxic grains. Independent analysis of ZnP‐coated grains showed variable toxin loading indicating that consumption of a single grain would not guarantee intake of a lethal dose. There was also a strong and rapid behavioural aversion if mice did not consume a lethal dose on the first night. CONCLUSIONS The registered dose rate of 25 g of ZnP/kg wheat (~1 mg of ZnP/grain) in Australia needs to be re‐evaluated to determine what factors may be contributing to variation in efficacy. Further field research is also required to understand the complex association between ZnP dose, and quantity and quality of background food on efficacy of ZnP baits. Number (mean ± 95% CI) of ZnP‐coated grains [barley with husk (), malt barley with husk () or malt barley without husk ()], consumed by mice (n = 10) over three nights while held on either lentil, barley with husk or wheat background. Shapes (, , and ) represent estimates of fixed effects (individual mice as random effects). © 2021 Commonwealth Scientific & Industrial Research Organisation. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
Sprache
Englisch
Identifikatoren
ISSN: 1526-498X
eISSN: 1526-4998
DOI: 10.1002/ps.6720
Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_9299914
Format
–
Schlagworte
Animals
,
Aversion
,
bait substrate
,
Baits
,
Barley
,
Cereals
,
Coatings
,
control
,
Crops, Agricultural
,
Dosage
,
Edible Grain
,
Food
,
food preference
,
Food quality
,
Grain
,
Grain crops
,
Lentils
,
Lethal dose
,
Mice
,
Mortality
,
Mus musculus domesticus
,
Phosphides
,
Phosphines
,
rodenticide
,
Toxins
,
Wheat
,
Zinc
,
Zinc coatings
,
Zinc Compounds
,
Zinc phosphide
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