Top Crop Manager

News Insect Pests
Sharing pest lessons from Ontario’s challenging season


September 30, 2019
By Field Crop News

Topics

Parts of Ontario experienced one of their most challenging cropping seasons this year when a wet spring derailed season plans. However, with challenge comes opportunity. The field crop team from Ontario’s Ministry of Agriculture, Food and Rural Affairs (OMAFRA) compiled a list of pest lessons learned from this past year.

Highlights from the latest crop report include:

  • In general, when planting is very delayed, insecticide seed treatments may be less important than mid to later season scouting and crop protection against the later season pests.
  • Corn rootworm adults were very high this year, so corn after corn in 2020 will need rootworm protection.
  • It is always best to plan scouting when the crop is nearing the stages the pest is most attracted to rather than what the calendar says.
  • Most above ground Bt traits are only effective against one or two of our ear pests (not all of them) or are no longer effective because of resistance.
  • Traps don’t replace scouting. Western bean cutworm (WBC) traps appeared to be less effective than usual, making in-field scouting more important.

Read more in the latest crop report from OMAFRA’s field crop team.