Effective IRM Strategies and Approved Principles

Experience has shown that all effective management strategies seek to minimize the selection for resistance from any one type of insecticide or acaricide. In practice, alternations, sequences, rotations or even mixtures of compounds from different MoA groups provide a sustainable and effective approach to IRM. This ensures that selection from compounds in any one MoA group is minimized. The I RAC classification in this chapter is provided as an aid to insecticide selection for these types of IRM strategies. 

Applications are often arranged into MoA spray windows or blocks that are defined by the stage of crop development and the biology of the pest(s) of concern. 

Local expert advice should always be followed with regard to spray windows and timings. Several sprays of a compound may be possible within each spray window but it is generally essential to ensure that successive generations of the pest are not treated with compounds from the same MoA group. 

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