50 acre property needs to be treated for chiggers.

I am in need of a professional who can treat my fifty acre property for chiggers. The current level of infestation is moderate, and needs to be addressed immediately with an application of pesticide. I need the treatment to occur as soon as possible, due to an upcoming event. After the initial treatment, the property will need to be treated every three months to ensure a continued period without chigger infestation.