[1] Native to North America, it has been introduced into Russia and China for the biological pest control of ragweed.

The success of C. suturalis in Russia led to a population explosion with densities of up to 100,000,000 adults per square kilometre recorded subsequently.

[5] Overwintering adults began feeding in late April or early May of the following year, having emerged when ragweed seedlings were only 2–5 cm tall.

[6] No complex courtship behavioural patterns have been observed in C. suturalis; copulation most commonly takes place during the late morning or early evening and lasts from a few minutes to well over an hour.

[6] Eggs are deposited in clusters of two or three on the underside of young ragweed leaves, usually near the leaf tip.