A long-term pesticides rotation is one method for managing pesticides resistance. Especially with insects control, where a combination of
- The biology of the insect (short life cycle, fast & high reproduction rate)
- The intensity of chemical use in the past and present made it a critical proble
How is Pesticide resistance developed?
Insects develop a resistance to a chemical through natural selection: the susceptible are dying and the most resistant are the ones to survive and pass on their genetic traits to their offspring.
Long-term pesticides Rotations principles:
- The pesticides used in a rotation should belong to a different chemical group, not just different active ingredients.
- Use each effective pesticide for at least the duration of one generation of the pest before rotating to a different insecticide
- If two pesticides are used within the same pest generation, the selection effect will be essentially the same as using a tank mix
- To minimize the problems of overlapping generations it might be wise to use the same insecticide for two or even three generations prior to rotating.