Autumn Aphid BYDV Control

Despite high rainfall in October the weather has remained warm into November and it is important not to forget about controlling aphids to prevent crops being infected with Barley Yellow Dwarf Virus. BYDV-infected cereals produce lower yields and poor-quality, shrivelled grain; the earlier infection occurs, the greater the effect. In winter barley, severe infection can reduce yield by 70-80% and in winter wheat by 25-30%. Aphids feeding on these crops can cause infection in as little as 30 minutes. Where Redigo Deter has been used as a seed dressing, depending on seed rate the crop will protected for up to 10 weeks. Below is a handy in season checklist highlighting the key points.

  • Monitor Rothamsted aphid alerts for seasonal pressure

  • Non-Deter treated September sown/early emerging crops should be treated from 1 leaf - but monitor at emergence for aphid  numbers
  • Treat appropriate to risk and conditions
  •  Applications will be required until seasonal risk has passed
  •  Be realistic with pyrethroid dose and expectation of persistence

  •  Check product label for number of applications or total dose in crop

  •  Ensure that anthropod buffer zones are observed

  •  Do not over react with blanket multiple treatments - this will deplete the natural predatory population.

For more information please speak to your R.M. Jones Agronomist.


















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