Here is a picture of an overnight trap capture near Cornwall. Phil Hall is swamped with calls to deal with them not only from a human stand point but for equine and livestock as well. Pyrethroids as premise spray work well if applied correctly at the right dosage. Pick an insecticide with a long residual examples would be Suspend Wisdom etc. If you observe larvae in pools and ponded water then Bt pellets are working. As with any emergency West Nile Virus Educators are treating high population areas but many growers will need to treat their own properties to avoid possible infection. Check out West Nile Educator Phil Halls Facebook for his reports and recommended actions.