One minute, there are no “ladybugs” in Duluth. Then one sneaks up and nibbles your arm. Suddenly Asian lady beetles are swarming everywhere. And then it’s over. The 2017 invasion happened on the afternoon of Oct. 8.
Asian lady beetles tend to cluster and swarm when daylight hours shorten and a sudden warm spell occurs. They eat aphids while conditions allow, then they quickly disappear.
