Laboratory evaluation of Beauveria bassiana, some plant oils and insect growth regulators against two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae)

Tarikul Islam, Md. Jamil Hossain Biswas, Mohammad Tofazzal Hossain Howlader, Mohammad Shaef Ullah

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The acaricidal activity of entomopathogenic fungus Beauveria bassiana (strain GHA), three essential plant oils namely, neem (Azadirachta indica A. Juss), mahogany (Swietenia mahogoni L.) and karanja (Millettia pinnata L.), and two insect growth regulators (buprofezin and lufenuron)  were evaluated against the two-spotted spider mite, Tetranychus urticae Koch under laboratory conditions by leaf disc bioassay method. Results revealed that B. bassiana was highly effective in controlling T. urticae adults causing mortality from 3 days after treatment application. Among the plant oils tested, karanja and mahogany oils were found most effective against T. urticae and both the oils showed significantly better performance compared to all other treatments (P <0.05). Although neem oil showed comparatively lower toxicity than other plant oils, it was more effective than both the IGRs, buprofezin and lufenuron. However, all the treatments were found effective in controlling T. urticae populations and the study, therefore, suggested that the selected treatments could be considered for biorational management of the T. urticae.
Original languageEnglish
Pages (from-to)203-211
Number of pages9
JournalPersian Journal of Acarology
Issue number3
Publication statusPublished - 2017
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • Beauveria bassiana
  • bioassay
  • essential plant oils
  • insect growth regulators
  • Tetranychus urticae
  • Bioassay
  • Essential plant oils
  • Tetranychus urticae.
  • Insect growth regulators


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