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Determination of Baseline Values for Susceptibility of Polyphagotarsonemus latus (Tarsonemidae: Acari) to Acaricides

Author: Neenu Augustine, M. Mohan, N. Srinivasa, T. Venkatesan, A. Mohan Rao and P.S. Benherlal

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Abstract

The broad mite/yellow mite, Polyphagotarsonemus latus (Banks) is an important crop pest damaging several crops including chilli, capsicum, mulberry, jute, tea, sesame, cotton, etc. In India, farmers experience frequent control failures of this mite with several recommended acaricides for which development of acaricide resistance is assumed as the major reason. In order to monitor acaricide resistance in field populations, the availability of a population that is completely susceptible is crucial. To achieve this, an iso-female colony of P. latus was maintained under nethouse conditions for more than 70 generations without exposure to any xenobiotics and leaf dip bioassays were conducted using diafenthiuron, dicofol, propargite and spiromesifen. The LC50 values determined were 0.40 ppm for diafenthiuron, 0.70 ppm for dicofol, 0.37 ppm for propargite and 0.58 ppm for spiromesifen. This is the first report of baseline toxicity data of commonly used acaricidal compounds to P. latus which can serve as reference data in monitoring acaricide resistance in field populations.

Keywords

Broad mite, Polyphagotarsonemus latus, acaricide, resistance, susceptibility

Conclusion

The control of P. latus is largely accomplished by the use of acaricides. The high reproductive potential and extremely short life cycle of this mite, combined with the frequent applications of acaricides facilitate resistance development in this species. The present study is the first report of baseline toxicity data of commonly used acaricidal compounds to P. latus. The baseline values determined were 0.40 ppm for diafenthiuron, 0.70 ppm for dicofol, 0.37 ppm for propargite and 0.58 ppm for spiromesifen.

References

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How to cite this article

Neenu Augustine, M. Mohan, N. Srinivasa, T. Venkatesan, A. Mohan Rao and P.S. Benherlal (2022). Determination of Baseline Values for Susceptibility of Polyphagotarsonemus latus (Tarsonemidae: Acari) to Acaricides. Biological Forum – An International Journal, 14(4): 977-979.