Home Crop Monitoring Wheat School: Getting the better of bluegrass

Wheat School: Getting the better of bluegrass


Grain growers are reporting that bluegrass is changing into a rising weedy problem in lots of Ontario discipline crops. There are three varieties of weedy bluegrass species which are being discovered: annual bluegrass, rough-stalk bluegrass, and Canada bluegrass.

As Mike Cowbrough, Ontario Ministry of Agriculture, Meals and Rural Affairs weed specialist explains on this Wheat College episode, the motive bluegrass is such an issue is as a result of all three species are prolific seed producers and spreaders. The latter two species, rough-stalk and Canada bluegrass, additionally unfold by stolons — root stems that journey alongside the floor of the soil, ship out nodes, and root themselves in.

“Populations can build up in a hurry, and in a winter wheat crop like this, Michigan State University has seen as much as 50 per cent yield loss from this species being in the field,” says Cowbrough.

Bluegrass additionally heads out at the similar time that wheat does, so when making use of a fusarium fungicide, the bluegrass head can hinder the spray utility.

To rapidly establish bluegrass, Cowbrough says to tug again the leaf blade and take a look at the spot the place the leaf blade attaches to the fundamental stem, the place there’s a membraneous ligule. The seed head is an open panicle, and the leaf blades are folded and there’s a novel bend to the high of the leaf. (See video for much more element, story continues beneath)

Cowbrough additionally says {that a} pattern could be despatched to a diagnostic lab, the place DNA testing can affirm precisely which species of bluegrass is current.

A discipline trial that Cowbrough has been keeping track of this season, has taught him two issues: making use of herbicide when bluegrass is lower than 10 cm tall is essential to getting good management; and timing of that herbicide utility can have an effect on bluegrass’ copy possibilities.

“You always have to be a little bit careful about environmental conditions at the time of application,” warns Cowbrough, however provides to deal with staging of bluegrass — smaller is better.

Backside line, Cowbrough says is to scout fields in the fall and early spring to be on the lookout for bluegrass in between the rows of winter or spring wheat. If there’s vital stress, it must be handled when vegetation are small to have the finest likelihood at management.


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