A number of Suffolk County salt marshes will be sprayed Tuesday from 5 p.m. to 8 p.m. in an effort to control mosquito larvae, the first such treatment of the season, the county health department said Monday.

No precautions are suggested as "the helicopter will be flying at a very low level over marsh areas and taking other precautions to control drift into inhabited areas," health officials said in a release.

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Plus, the pesticide to be used, Vectobac 12AS, has "no significant human toxicity," officials said, and "human exposure from this operation is unlikely."

The treatment is weather-permitting and could be carried over to another day.

For more information, see www.suffolkcountyny.gov/Departments/HealthServices/PublicHealth/PreventiveServices/PesticideApplicationNotification.aspx