Grainews

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FEATURE

FEATURE

Lee Hart’s Farmer Panel

Pea leaf weevil moves in to new territory

Spring seeding conditions are a mixed bag across the Prairies 8

Be on guard in your field pea and faba bean fields 9

Volume 43 · number 11 may 16, 2017 · $4.25 Practical production tips for the prairie farmer www.grainews.ca

By Angela Lovell

Insect management

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A NEW SPECIES OF MIDGE

n anonymous midge species has been identified in Saskatchewan and central Alberta. The new species is similar to Swede midge (a species already present in Saskatchewan), but to this point does not appear to have caused significant, widespread damage in canola crops. Researchers are still trying to find out more about the as yet unnamed midge species. “We’ve positively identified that it isn’t Swede midge, and we’ve looked at a lot of other described species. So far, it has not matched up to any of those so we are very certain that it’s yet to be described and is basically a new species,” says research scientist Dr. Boyd Mori of Agriculture and Agri-Food Canada’s Saskatoon Research and Development Centre. Mori first discovered the new midge in soil emergence traps. “We need one more field season to research it and maybe this fall we’ll have a name for it.” Judging by what researchers have seen to date, they don’t believe pro-

Researchers say this new “anonymous” midge is not an imminent concern, but it’s worth watching This is a photo of the female of the new “anonymous” midge species. Photo: AAFC, Saskatoon

ducers should be too concerned about the anonymous midge, or Swede midge, another species that only began showing up in Prairie fields about 10 years ago, for the upcoming season. Last season’s warm, moist spring, which followed an exceptionally mild winter, provided ideal conditions for an explosion of Swede midge (and presumably the new midge species) across the Prairies. Crops emerged six to seven weeks early, favouring Swede midge, which has caused devastation in Ontario, where it can produce up to four or five generations, depending on conditions, in a single season. “We were definitely anticipating some surprises last season,” says Saskatchewan provincial entomologist Scott Hartley. “A warmer spring than we’d had for a while, and the much earlier emergence of crops provided a longer period of time for something that has multiple generations in a year to attack, and we expected to see more of the symptoms that we see in Ontario.” See NEW SPECIES on Page 5 

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