Monarchs usually arrive in our region by the first week in July and go through several brood cycles. This year, barely any arrived. The Monarch’s sensitivity to temperature and dependence on milkweed make it vulnerable to environmental changes. Since 1994, U.S. and Mexican researchers have recorded a steady decline in the Monarch population in their overwintering grounds, with 2012-2013 being the lowest recorded to date.
Temperature change and habitat loss affect breeding success and longevity. Dr. Chip Taylor, a leading Monarch researcher at the University of Kansas reports that the widespread adoption of GMO corn and soybean crops resistant to herbicides, along with with intensive herbicide use, coupled with the federal government’s incentivized expansion of corn and soy acreage for the production of biofuels have caused a significant drop in milkweed throughout the heart of the Monarch’s range. Lack of milkweed equals no Monarchs. “Monarch/milkweed habitat has declined significantly in parallel with the rapid adoption of glyphosate-tolerant corn and soybeans and, since 2006, the rapid expansion of corn and soy acreage to accommodate the production of biofuels,” Taylor wrote on May 29.
What can we do? Encourage conservation organizations that conserve Monarch habitat, plant milkweed, plant nectar plants, and raise caterpillars. Hopefully the weather next spring and early summer will be more conducive to the Monarch’s northward migration and breeding success, and if and when the Monarchs arrive, they will find our milkweed plants.
If anyone sees a Monarch, please email me at email@example.com or leave a comment in the comment section.