JOHANNESBURG, South Africa (AP) _ A British woman who allegedly threw a tomato at President P.W. Botha was ordered deported, the government announced Saturday.

The tomato reportedly missed the president. The woman, Sally Hutchings, was issued with a deportation order by the Home Affairs Ministry.

The tomato was thrown Friday during a ceremony at the University of South Africa in Pretoria, where Botha was attending a reception for winners of government awards for meritorious service.

According to The Star newspaper, Botha and his wife, Elize, were mingling with guests when the woman took a tomato from one of the buffet tables and flung it at the president. There was no indication of her motive.

Mrs. Hutchings was a lecturer in the university's statistics department and had submitted her resignation prior to the incident, The Star newspaper said.

The Home Affairs Ministry did not say when Mrs. Hutchings would be deported.

''This action, although without serious injurious consequences and in itself not perilous, is considered in a very serious light,'' the ministry said. ''Should the object have contained explosives, the lives of the state president and other persons could have been in jeopardy.''