http://www.newsweek.com/these-blood-sucking-sand-flies-love-munching-marijuana-1191783

When they’re not sucking the blood of animals, sand flies have a fondness for munching on the marijuana plant (Cannabis sativa), new research suggests.

An international team of scientists found that, in proportion to its abundance, Cannabis sativa was consumed by sand flies much more frequently than expected, suggesting it is highly attractive to the insects.