In spite of the dramatic swings in temperature experienced in recent weeks, cereal crops are still showing signs of active mildew, reports Dr Dawkins, Certis’ technical manager.
“The burden of mildew on crops was very high in early January following a very mild winter but the cold snap certainly reduced the visible levels and older leaves bearing infections were removed,” he explains.
However, he warns that inoculum levels remain high and new infections are now beginning to establish on new leaves.
“Given these recent sightings, growers should consider adding a robust mildewicide to either T0 or T1 to ensure the disease is kept in check and doesn’t become a problem later in the season,” advises Dr Dawkins.
“Products containing the active ingredient cyflufenamid used at between 0.15 and 0.2l/ha will give excellent control of mildew from a preventative and curative perspective.
“Compatible with SDHI chemistry and triazoles, it has given very worthwhile yield benefits when used as part of disease control programmes.
“And in studies conducted over the last four seasons on over 400 isolates of mildew from the UK there has been no shift in sensitivity to cyflufenamid shown,” he reports. “This illustrates the robust nature of products containing this active ingredient.”
“It will be a very valuable addition to the control armoury this spring given the current scenario of mildew risk,” he believes.