How to kill red ant colonies in a greenhouse naturally?
Tillamook County Oregon
Please check this Washington State University information sheet to try to verify this is the type of ant in your greenhouse. This describes the European fire ant (sometimes known as red ant). It gives some non-chemical management options to reduce the desirability for colonies and limit populations. http://pestsense.cahnrs.wsu.edu/Search/MainMenuWithFactSheet.aspx?CategoryId=3&ProblemId=848