Vet-Kem Siphotrol Plus Fogger kills adult fleas and ticks, stops hatching eggs and larvae from developing into adult fleas and prevents flea reinfestations and flea build-up. Precor IGR stops flea eggs and flea larvae from developing into adult fleas for up to seven months. It's perfect for simultaneous multiple-room treatment, or for treating an entire home at once. One 3-ounce can treats 3,000 cubic feet.