sentences:  This leads researchers to believe that beet leafhoppers are unable to use the natural turgor pressure of phloem sap in order to ingest fluid and may need to use muscles to actively draw sap from phloem.A study of beet leafhoppers in Idaho showed that they are capable of producing multiple generations within a year, with generally 3 different generations produced in Idaho in a year.The insects are active in mustard and flixweed plants over winter and females begin laying eggs in March.