The economics of blackleg control

Australia’s oilseed expert, Dr Steve Macroft, will discuss the economics of managing blackleg at BCG’s Trials Review Day on Friday 19th of February at the Birchip Leisure Centre.

Research into blackleg control has shown new fungicide actives and timing recommendations have produced large yield responses. However, these are variable ranging from nil to 20% yield increases in on‐farm strip trials and nil to 40% yield increases in small‐plot research trials.

“It can therefore be challenging for growers to decide whether to apply fungicide, particularly in decile 4 to 7 years where there is a lot to be gained or lost from fungicide decisions,” Dr Marcroft said.

The level of crop damage and hence yield loss caused by the disease is determined by a number of interconnected factors, understanding these is key to fungicide application decisions.

“At BCG’s Trials Review Day I’ll be highlighting how these factors—including stubble management, variety resistance ratings, crop rotations and crop isolation, fungicide resistance, seed treatment, sowing time, time of infection and timing of application—can be used to help make fungicide application decisions easier,” Dr Marcroft finished.

Dr Marcroft will also be discussing the BlacklegCM decision support tool to identify high risk paddocks and explore management strategies, the choice of actives and managing fungicides for longevity.

The BCG Trials Review Day is a members’ only event. Attendees are encouraged to register online at https://www.bcg.org.au/events/. The event will be adapted to suit a socially distanced and digital
audience.

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