Agricultural
15 March, 2023
Be on alert for powdery mildew
Powdery mildew has been detected in some mungbean crops in southern Queensland within the last few weeks.
The troublesome disease is caused by the fungal species, Podosphaera xanthii and Erysiphe vignae.
It initially appears as small white powdery spots, and can spread to cover the entire leaf surface.
Plant pathologist Lisa Kelly said it has been spotted at Pampas and is likely to be more widely spread.
She said two fungicide options are currently under permit to manage it, including tebuconazole products (PER13979) and Veritas® Opti, which contains a mixture of tebuconazole and azoxystrobin.
The Powdery Mildew MBM app is available to assist growers and advisors in making fungicide management decisions.
The Department of Agriculture and Fisheries and University of Southern Queensland researchers have field trials underway to further validate the Powdery Mildew MBM app.
Contact Lisa Kelly at lisa.kelly@daf.qld.gov.au or 0477 747 040 for further information on disease diagnosis.
