Despite initial success with spraying of Dursban-50W in controlling a roach infestation in the Oak Avenue rubble fill in Joppatowne and neighboring properties, county health officials say more intensive efforts may still be needed to eliminate the pests.
In a report to the County Council Dec. 5, Thomas M. Thomas, the county health officer, suggested that at least five other treatments should be considered.
"With respect to the public and private sewerage systems we feel that several options need to be explored. These options need to address both short-term and long-term measures. . .." Thomas said in his report.
He suggested the following options:
* Treat with pyrethruns, a different insecticide.
* Apply boron dust for six months in residential areas.
* Apply insecticide paint on bottom of manhole covers for 1-1 years.
* Seal manholes after treatment if possible.
* Seek additional options from University of Maryland, Department of Entomology.
A committee of area residents and state and county officials which has been meeting to discuss the issue will make a decision on which option to pursue.
John Goheen, a spokesman for the state Department of the Environment, said two weeks ago that the roach problem within the landfill was under control, but that insecticide spraying would continue in the affected Joppatowne area homes as needed.