Yellow spot (Tan spot)
Tan brown-flecks turning into yellow-brown oval shaped spots/lesions surrounded by yellow margins, may expand into 10-12 mm in diameter. Large lesions coalesce with dark brown centers. Spot develops on both sides of leaves. Temperature from 20ºC to 30ºC and free moisture favours disease development. In susceptible cultivars yellow spot can cause up to 30% yield losses
® Denotes registered trade mark.
R Denotes registered in Queensland
Consult label for dosage
The above information is given as a guide only. These products must be used strictly as directed and in accordance with all instructions on the label and in other current reference material. Fungicide registrations and recommendations change continuously. Always consult the label and adhere to the label recommendations. In particular observe dosage rates, timing of application, re-entry and withholding periods.
It is important to ensure the application equipment is in good working order and accurately calibrated. It is also important to ensure the fungicide has not exceeded its shelf life.
Foliar fungicides can give good control as long as they are applied early in the epidemic. Their effectiveness will depend on varietal susceptibility, level of infection and the stage of crop growth at application.
Diagnosing leaf diseases in wheat
