Sentence:  The department is planning to expand its eradication program soon to four additional counties - Troup , Pierce , Bryan and Bulloch - to <WSD>treat</WSD> 132000 acres infested by the ants , according to W. E. Blasingame state entomologist . 
Meaning of the word marked with <WSD> tags:  subject to a process or treatment, with the aim of readying for some purpose, improving, or remedying a condition