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Home > Plants, Pests & Pest Control > Pest Management > Invasive Plant Pests > Commodities Survey

Commodities Survey


A number of invasive insects and pathogens threaten commodities in Minnesota and could cause problems for production and export if they were to become established here. The Minnesota Department of Agriculture (MDA), along with partners at the USDA and the University of Minnesota, conduct an annual review of invasive species that pose the greatest threat to crops in Minnesota and focus survey efforts accordingly.

Commodity crop surveys are conducted June through August and all of the primary agricultural production areas of Minnesota are included. The following organisms are the focus of surveys in progress during 2016:



  • Cucurbit beetle (Diabrotica speciosa) – last survey in 2015
  • Brown marmorated stink bug (Halyomorpha halys) – last survey in 2015
  • Japanese beetle (Popillia japonica) – last survey in 2015
  • Late wilt of corn (Harpophora maydis) – last survey in 2015
  • Downy mildew of corn (Peronosclerospora maydis) – last survey in 2015
  • Tar spot (Pyllachora maydis / Monographa maydis) – new survey in 2016
  • Southern rust (Puccinia polysora) – new survey in 2016
  • Brown stripe downy mildew of corn (Sclerophthora rayssiae var. zeae) – last survey in 2015
  • Palmer amaranth (Amaranthus palmeri) – last survey in 2015
  • Witchweed (Striga asiatica) – last survey in 2015

Last Updated: June 14, 2016