There's an update to the scheduled herbicide application on Lake Zoar.  Selected areas of Newtown, Monroe, Oxford and Southbury will be chemically treated with Diquat herbicide, targeting control of the aquatic nuisance plants Eurasian watermilfoil and curlyleaf pondweed.  The treatment is tentatively scheduled for Tuesday, with a rain date of Thursday.   The shorelines of treated areas will be posted with signs that list temporary water use restrictions to be imposed in treated areas.  There will be no restrictions for swimming, boating and fishing , but people shouldn't use treated lake water for drinking purposes for 3 days or for livestock or domestic animal consumption for 1 day.  People should not use treated lake water for irrigating turf or ornamentals for 3 days, or for irrigating food crops or production ornamentals for 5 days.