Southwest Florida Water Management District will apply herbicides to the Withlacoochee River and Istachatta, Silver and Crump lakes from Monday through Thursday. About 40 acres of the Withlacoochee will be treated with Diquat from Wysong to Jumper and from U.S. 41 to State Road 200. Crops should not be irrigated and the water should not be ingested for 14 days. In addition, no swimming is allowed for 24 hours. Istachatta, Silver and Crump lakes will be treated with Sonar. Crops should not be irrigated for 30 days. Fishing is not restricted at any of the areas. Signs will be posted in treated areas displaying treatment dates and restrictions. For information, call Wendy Andrew at 423-1476 or 796-7211.