Gerald L. Long, 36, a research aide at the University of Maryland and a resident of the Washington area since the early 1960s, died Wednesday at Prince George's General Hospital of injuries suffered in a motorcycle accident that day.

Prince George's County police said Mr. Long was eastbound in the 10400 block of Cherry Hill Road in Beltsville when he lost control of his motorcycle on a curve and collided with two oncoming cars. He was taken to the hospital by helicopter.

Police said there were no other injuries in the accident.

Mr. Long was a native of Williamsport, Md., and attended the University of Maryland. Since 1968, he had worked for the university's agricultural engineering department on tobacco research projects.

He lived in Beltsville and belonged to the Manor Church of the Brethren in Boonsboro, Md. Mr. Long also was a member of the Choral Arts Society of Washington.

His marriage to Patricia E. Long ended in divorce.

Survivors include his parents, Lawrence and Hazel Long, a brother, Galen, and two sisters, Rebecca and Brenda Long, all of Williamsport.

The family suggests that expressions of sympathy be in the form of contributions to the memorial fund at the Manor Church of the Brethren, Rte. 1, Box 373A, Boonsboro, Md., 21713.