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Essential oils have been investigated for control of the poultry red mite

The influence of ‘time since last blood meal’ on the toxicity of essential oils shown to be acaricides for the poultry red mite, Dermanyssus gallinae. Tegan Jade Smith, School of Agriculture, Food & Rural Development, Newcastle University, UK. Email; T.J.Smith@newcastle.ac.uk. Aim

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Essential oils have been investigated for control of the poultry red mite

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  1. The influence of ‘time since last blood meal’ on the toxicity of essential oils shown to be acaricides for the poultry red mite, Dermanyssus gallinae Tegan Jade Smith, School of Agriculture, Food & Rural Development, Newcastle University, UK. Email; T.J.Smith@newcastle.ac.uk Aim ● The aim of the current project was to investigate the toxicity of essential oils to poultry red mite (a serious pest of hens), starved for varying periods, to test the hypothesis that… The toxicity of plant essential oils to the poultry red mite is affected by mite physiological condition. Use of synthetic acaricides is hampered by pest resistance & product withdrawals More research is needed to assess the potential of plant essential oils as acaricides Essential oils contain chemicals toxic to pests. E.g. linalool from lavender Lavender Essential oil toxicity may be affected by mite physiological condition Essential oils have been investigated for control of the poultry red mite Methods ● 23 mites were placed in Petri dishes with a filter paper impregnated with 0.21 mg/cm² of essential oil from thyme, palmarosa, caraway or juniper leaf. ● Mites used had been collected 3, 6, 10, 13, 17 or 20 days prior to experiments, and stored for that period without food. Dishes were left at 22°C for 24 hours. ● % mite mortality in treatment dishes was corrected to account for that in control dishes. Arcsin square-root transformed data were analyzed by ANOVA (& Tukey Tests). Results Conclusions ● There was a trend for the acaricidal effect of all essential oils to increase as mites were starved for long periods. ● Essential oils may be effective as acaricides, especially if used to treat between flocks of hens (if the period between flock removal and treatment is long enough). Mortality of mites in tests (means back-transformed). Within treatment means not sharing a common letter are sig. different (P < 0.05). Poultry red mite Acknowledgements; This work was funded under Newcastle University's 'Vacation Scholarship’ scheme as part of MITEeHEN (a larger, Defra funded study). Images used were sourced from the following locations; Insecticide=amazon.com; toy mite=profesoraloca.vox.com; superman symbol=comicbookcloset.com; lavender=alphazero.web.aplus.net; essential oil=thebodyshop.com; poultry red mite=georgiasouthern.edu; Charlie Brown student=www.saddleback.edu.

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