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Check potato crops for aphids

Different thresholds for seed and ware

Aphids have been flying into seed and ware crops during the recent spell of warm weather.

Check crops for aphids and consider treatment with an aphicide if aphids are found.

For seed crops aphid control is essential to minimise the spread of aphid-borne viruses such as leaf roll and severe mosaic. If aphids are being found on seed crops then the aphid management programme should begin immediately.

On ware crops, aphid numbers need to reach 5 aphids per leaf to justify an aphicide treatment. Hallmark Zeon or Aphox can be applied as single applications, but check the efficacy of the product and if aphids are still alive after application of either of these products, there may well be aphicide resistant aphids present, in which case apply Plenum.