i don't know about the toxic thing but in my kitchen when we have fruit flies we put a glass with a about an inch of conyac (i have know idea how to spell it but its pro. con-yac its a type of booze) and we leave it sitting on the conter and just overnite all the fruit flies are drowned in it. there is something in the smell it attracts the fruit flies they land in it and can't get out. it works great. hope this helps.