Under what condition can mosquito control be conducted on private land without explicit permission?

Mosquito control can be conducted on private land without explicit permission during a public health emergency because such conditions typically invoke a need for immediate action to protect public safety. During these emergencies, the risks posed by mosquito-borne diseases increase significantly, necessitating rapid response measures. Public health authorities are often empowered to take necessary actions to control pests that may threaten the health of the community in such scenarios, which includes conducting mosquito control operations without requiring permission from landowners.

In contrast, conditions such as pest infestation may allow for control measures, but generally, the landowner's consent is still needed. Similarly, conducting a land survey or pesticide experimentation would not warrant proceeding without permission, as these activities do not necessarily pose immediate public health risks and typically require proper consent from the property owner.