University of Missouri Extension
       Callaway County


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June 2000

Mayflies in June?

 

Double Cropping after Wheat
June 21

Jim Jarman
573 - 642 - 0755
jarmanj@missouri.edu

 

Over Sunday evening and Monday morning, a large emergence of big Mayflies covered a wide area of Fulton. Many were seen clinging to the County Courthouse and surrounding monuments, other down town buildings, and on new and used cars. They were attracted to the bright lights that were on all night.

The adult Mayfly is just about the most harmless of insects if their numbers are not too large. They live about one day or less and do not feed on anything (because they have no mouths). Since most Mayflies are smaller, live such a short time, and come out at night in smaller numbers, they usually go unnoticed. Very large numbers of Mayflies have been know to cause accidents by making roads and bridges slippery when cars and trucks crush their bodies.

The immature Mayflies live for one, two or three years depending on the species. They live in streams, lakes or ponds and are a common food for fish. They can be identified by the three feather like gills on the tip of their abdomen.