Septoria Resistance Confirmed at Tillage Conference
29 January, 2003
An unexpected discovery of some Septoria resistance to new strobilurin chemicals was announced by Dr. Jimmy Burke, at the Teagasc National Tillage Conference in Carlow on Wednesday 29th January.
This initial discovery of some Septoria resistance to the new strobilurin chemicals, which became available to growers over the past few years and which now treat the majority of cereal crops in Ireland and elsewhere was unexpected. According to Dr. Burke “anti resistance measures proposed by Teagasc must be followed by growers in 2003 otherwise the problem might not be contained”.
This primarily means that alternative control procedures using the older triazole compounds be used in the first and third sprays, while the strobilurin type compounds be used at the flag leaf spray only, with a robust rate of triazole chemistry added to ensure season long disease control added Dr Burke.
The Teagasc National Tillage conference took place after a pretty bad production year in the tillage sector where crop yields and quality were well below average. “This was compounded by very severe disease levels in most cereal crops which farmers found difficult to control,” said Dr. Burke. Prolonged wet weather meant that the number of satisfactory spraying days were greatly reduced and accurate spray timing seriously affected which reduced overall efficacy.
The full conference papers can be found in 2003 National Tillage Conference
