Hyola canola varieties have been rated the highest in the industry for blackleg resistance in a recent GRDC publication.
All Hyola varieties currently on the market achieved either the top rating of Resistant (R) or the second highest rating of Resistant-Moderately Resistant (R-MR) in the organisation’s 2015 autumn blackleg management guide.
No other company in the comparisons scored R.
The annual fact sheet helps growers determine whether they are in a high-risk situation and what practices they can change to reduce or prevent yield loss from blackleg, a potentially devastating disease.
Justin Kudnig, canola manager at the company which markets the product, Pacific Seeds, said along with yield and oil, blackleg resistance is a key trait to consider when selecting a cultivar.
“We believe, along with high yield and oil, another trait of equal importance for Australian canola growers is to have the highest levels of inbuilt blackleg resistance,” he said.
Mr Kudnig said industry agronomists and consultants continued to use the GRDC blackleg management guide as it empirically assisted growers with making informed decisions on varietal selections.
Pacific Seeds conducts blackleg screening of its lines at its Toowoomba, Queensland facility and also in the field.
Mr Kudnig said it “continues to invest significantly in research” at its world-class blackleg screening glasshouse facility and in its intensive field screening program across Australia.
“We set out to build an industry leading intensive blackleg screening program that it employs for all its parent lines and new hybrids under development.”
He said this resulted in Hyola hybrids again topping each herbicide tolerance group in Australia with the highest adult resistance ratings possible in the industry, including the new Roundup-Triazine (RT) dual herbicide tolerance category.
“This is a major credit to our diligent and focused research team.”
According to Mr Kudnig, growers have another clear advantage with Hyola hybrids ‚Äì the different combinations of blackleg groupings enable growers each year to effectively use Hyola hybrids for ongoing blackleg resistance management.
The GRDC fact sheet outlines four steps to follow for successful management of blackleg.
It summarises the process in five key points: monitor your crops in Spring to determine yield losses in the current crop; choose a cultivar with adequate blackleg resistance for your region; never sow your canola crop into last year’s canola stubble;relying only on fungicides to control blackleg poses a high risk of fungicide resistance; and, if your monitoring has identified yield loss and you have grown the same cultivar for three years or more, choose a cultivar from a different resistance group.