The Bureau of Insect Control shall be administered by and be under the direct supervision of the Insect Abatement Supervisor, subject to the overall supervision of the City Health Officer.  The duties of the Insect Abatement Supervisor shall be to supervise the eradication of earwigs, elm leaf beetles, mosquitoes, and other injurious insects affecting premises, buildings, trees or shrubs within the City.  To that end the Insect Abatement Supervisor or his assistants or employees in the Bureau of Insect Control shall to the full extent permitted by law, have power and authority to enter into and upon any premises in the City for the purpose of inspecting the same to determine the presence of earwigs, elm leaf beetles, mosquitoes, and all other injurious insects, whether they are on the premises or in the buildings, trees, or shrubs thereon.  If it shall be determined from inspection that any nuisances exist on any such premises in any buildings, on any trees or shrubs, or in any other places within the City, such Insect Abatement Supervisor shall, either directly or through his assistants or employees in the Bureau of Insect Control, take immediate action to abate the same in such manner as may be deemed proper to accomplish such purpose.  The Insect Abatement Supervisor shall have power and authority to confer with and receive gratuitous service and advice from persons trained in eradicating injurious insects.  The Bureau of Insect Control shall have power and authority to use such means, methods, materials, liquids, or poisons as shall be determined necessary to carry out the eradication of the said nuisances, or to use any other scientific and lawful means of eradication or control of such nuisance.