The Connecticut Agricultural Experiment Station shall, within available appropriations and in accordance with the provisions of this chapter, conduct surveillance and testing for the existence of mosquitoes carrying the eastern equine encephalitis virus in accordance with a plan developed and agreed upon by the Commissioner of Energy and Environmental Protection, the Commissioner of Public Health and the director of the Connecticut Agricultural Experiment Station. Such plan shall specify procedures to assure that any expenditures for surveillance and testing shall be reasonable and prudent. The director of the Connecticut Agricultural Experiment Station or any person authorized by him to implement the provisions of this section may, at any reasonable time, enter any public or private premises in the performance of his duty.