With the 2017 cropping season shaping as a high risk year for barley leaf rust and wheat leaf rust in Western Australia, it is not too late for growers to control regrowth from last season’s crops that can harbour rust pathogens.
A virulence change in the Ascochyta blight pathogen has broken down the resistance of chickpea varieties to the devastating disease, with all current varieties now rated as either susceptible to moderately susceptible to infection.
Growers across the southern cropping region are avoiding extensive yield and economic losses by knowing the risk of soil-borne diseases before they begin sowing this year’s crops.
Predicta B DNA-based soil tests across northern NSW and southern Queensland so far this year suggest the risk of crown rot and root lesion nematode (Pratylenchus thornei) for 2017 crops is similar to 2016, with 26pc and 49pc of paddocks recording medium to high risk levels respectively.
South Australian chickpea growers are being urged to consider their ability to effectively manage ascochyta blight before planting the crop.
Canola growers in Western Australia’s southern region and parts of the central region have been warned to take evasive action to protect their crops from the fungal disease blackleg, with an elevated risk of infection and the resistance level of several varieties downgraded.
Following the first outbreak of anthracnose disease in commercial lupin crops in NSW last year, the state’s growers have been advised that lupins can be grown outside a small zone of infected properties in southern NSW if they adopt a five-point management plan.
A wet spring may have produced the best conditions for one of the cropping industry’s biggest yield thieves: the cereal cyst nematode (CCN).
The wet season of 2016 will have favoured the multiplication of many soil-borne pathogens, with experts recommending that any growers contemplating growing wheat in paddocks following cereals or grassy pastures to consider using PreDicta B® testing.
Australian grain growers are being advised to implement effective integrated disease management strategies following the discovery of resistance to strobilurin fungicides in wheat powdery mildew (WPM).