Home Crop Monitoring Pulse School: Knowing herbicide history and tackling weeds early on

Pulse School: Knowing herbicide history and tackling weeds early on


Relying on the place you farm throughout the Prairies, you may need some issues about herbicide carryover from the earlier yr, particularly after a dry fall.

“If you’re in some of the drier areas of the prairies, especially southern Alberta or across Saskatchewan, you might want to take a look at some of the herbicides you used last year and not necessarily assume they’re gone,” says Robyne Bowness Davidson, pulse analysis scientist at Lakeland School.

There are a variety of things that play into herbicide carryover — moisture being one of the essential, as water can break down chemical molecules into much less lively items.

Which ends up in the subsequent issue, which is soil texture. Soils with excessive natural matter or increased clay content material have a greater likelihood at binding chemical molecules to their clay particles. Due to that natural matter content material, they’ll even have extra soil microbes, that are additionally accountable for breaking down herbicides.

It’s essential to notice that herbicide carryover can construct up from a couple of yr, so having that herbicide history recorded is admittedly essential.

“The ones that come to mind the most would be group 2s — your group 4s and maybe some of your group 27s seem to be the ones that affect the pulses repeatedly every year,” says Bowness Davidson.

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Should you’ve decided that there isn’t an opportunity of herbicide carryover in your goal fields, the subsequent concern is preserving your pulse crop freed from weeds — particularly throughout the important weed-free interval.

Bowness Davidson says that it doesn’t matter which pulse crop you’re speaking about, none of them are good rivals with weeds and proper now’s the time to be occupied with weed points within the discipline from final yr, or when a pulse was grown in that discipline.

In a minimal until or zero-till operation there are pre-seed burn-down merchandise that may be safely used. However, Bowness Davidson cautions that utilizing a pre-seed burn-down product, must be pre-seed, not pre-emergence.

The important weed-free interval to guard the crop in opposition to competitors, and yield loss, is the window from when a pulse crop emerges as much as the sooner vegetative rising stage — the primary 4 to 6 weeks, says Bowness Davidson.

Maintaining these fields clear, and being conscious of herbicide history will set your pulse crop up for achievement.


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